master sat ii math
TRANSCRIPT
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ARCO
MASTER THESAT* SUBJECT TEST:
MATH LEVELS
1 AND 2
4th Edition
Mark N. Weinfeld
Lalit A. AhujaDavid Alan Miller
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An ARCO Book
ARCO is a registered trademark of Thomson Learning, Inc., and is used herein under licenseby Thomson Peterson’s.
About Thomson Peterson’s
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© 2006 Thomson Peterson’s, a part of The Thomson Corporation
Thomson Learning™ is a trademark used herein under license.
Previous editions published as SAT II Success Math 1C and IIC © 2000, 2001, 2004
Special thanks to Joan Marie Rosebush
Editor: Wallie Walker Hammond; Production Editor: Alysha Bullock; Manufacturing
Manager: Raymond Golaszewski; Composition Manager: Gary Rozmierski
ALL RIGHTS RESERVED. No part of this work covered by the copyright herein may be
reproduced or used in any form or by any means—graphic, electronic, or mechanical,
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ISBN 13: 978-0-7689-2304-9
ISBN 10: 0-7689-2304-2
Printed in the United States of America
10 9 8 7 6 5 4 3 2 1 08 07 06
Fourth Edition
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Contents
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
How This Book Is Organized . . . . . . . . . . . . . . . . . . . . . . . . . . viiComprehensive Answer Explanations . . . . . . . . . . . . . . . . . . . viiiSpecial Study Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
You’re Well on Your Way to Success . . . . . . . . . . . . . . . . . . . ixTop 10 Ways to Raise Your Score . . . . . . . . . . . . . . . . . . . . . . x
PART I: SAT SUBJECT TEST BASICS
1 All About the SAT Subject Test: Math Levels 1and 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Get to Know the Exam Format. . . . . . . . . . . . . . . . . . . . . . . . . 3 When to Use Calculators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4How the Test Is Scored . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Some Test-wise Strategies for SAT Subject Test Success . . . . 4Educated Guessing Will Boost Your Score! . . . . . . . . . . . . . . . 6
Getting Ready: The Night Before and the Day of the Test . . 6Summing It Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PART II: DIAGNOSING STRENGTHS AND WEAKNESSES
2 Practice Test 1: Diagnostic Level 1. . . . . . . . . . . . . . . . . 11
Preparing to Take the Diagnostic Test. . . . . . . . . . . . . . . . . . . 11Practice Test 1: Diagnostic Level 1 . . . . . . . . . . . . . . . . . . . . . . 11Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Answer Key and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 Practice Test 2: Diagnostic Level 2. . . . . . . . . . . . . . . . . 25
Preparing to Take the Diagnostic Test. . . . . . . . . . . . . . . . . . . 25Practice Test 2: Diagnostic Level 2 . . . . . . . . . . . . . . . . . . . . . . 25Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Answer Key and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . 35
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PART III: SAT SUBJECT TEST: MATH REVIEW
4 Multiple-Choice Math Strategies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Solving Multiple-choice Math Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Know When to Use Your Calculator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Learn the Most Important Multiple-choice Math Tips . . . . . . . . . . . . . . . . . . 45Summing It Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5 Numbers and Operations Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Properties of Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Exercise: Properties of Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Whole Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Operations with Whole Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Exercise: Whole Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73Operations with Fractions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Exercise: Fractions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Operations with Decimals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79Decimals and Fractions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Exercise: Decimals and Fractions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Operations with Percents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89Exercise: Percents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Exercise: Percent Word Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Systems of Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100Exercise: Systems of Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104Signed Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Exercise: Signed Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Summing It Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
6 Algebra and Functions Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Powers, Exponents, and Roots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112Exercise: Exponents, Powers, and Roots . . . . . . . . . . . . . . . . . . . . . . . . . 117
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Algebra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Exercise: Algebra. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128Exercise: Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
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Contentsiv
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Exercise: Word Problems Involving One Unknown . . . . . . . . . . . . . . . . 138 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139Exercise: Equation-Solving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Exercise: Linear Inequalities and Equations. . . . . . . . . . . . . . . . . . . . . . . 156 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Functions and Their Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164Exercise: Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173Summing It Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
7 Geometry and Measurement Review . . . . . . . . . . . . . . . . . . . . . . . . . 177
Plane Geometry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177Three-dimensional Geometry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Exercise: Geometry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210Coordinate Geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Exercise: Coordinate Geometry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Trigonometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219Exercise: Trigonometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225Trigonometric Functions of the General Angle. . . . . . . . . . . . . . . . . . . . . . . . 228
Exercise: Trigonometric Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235Exercise: Trigonometric Identity and Equations . . . . . . . . . . . . . . . . . . . 241
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242Solving Triangles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243Scalars and Vectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Exercise: Triangles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Graphs of Trigonometric Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251Exercise: Graphs of the Trigonometric Functions . . . . . . . . . . . . . . . . . 255
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256Summing It Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
8 Data Analysis, Statistics, Probability, and Advanced
Math Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
259Set Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Exercise: Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Probability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264Exercise: Probability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
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Permutations and Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270Exercise: Permutations and Combinations. . . . . . . . . . . . . . . . . . . . . . . . 273
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Exercise: Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Exponents and Logarithms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281Exercise: Exponents and Logarithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Exercise: Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Systems of Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296Exercise: Systems of Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Complex Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301Exercise: Complex Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305Sequences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
Exercise: Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310 Answers and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
Summing It Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
PART IV: FOUR PRACTICE TESTS
Practice Test 3: Level 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
317Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Answer Key and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Practice Test 4: Level 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340 Answer Key and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
Practice Test 5: Level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358 Answer Key and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Practice Test 6: Level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377
Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378 Answer Key and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
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Contentsvi
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Before You Begin
HOW THIS BOOK IS ORGANIZED
Almost a qua rter of a million students ta ke SAT Subject Tests every y ear. In
t h e p a st , t h e se t e st s w e re k n ow n a s t h e Co lleg e B oa rd Ach ievem e n t Te st s .
These tests are important for several reasons. Because many of the colleges
requir e SAT Subject Tests, these a re importa nt exams for you. The purpose of
these tests is t o measure a nd demonstra te y our knowledge an d/or skills insp ecif ic su b je ct s a n d t o t e st you r a b il it y t o a p ply t h a t k n ow le d ge t o e a ch
particular examination. The better your score is, the better your application
w ill look t o th e colleges of your choice.
I f yo u ’re re a d in g t h is b o o k , i t ’s l ik e ly t h a t yo u a re p re p a rin g f o r t h e S A T
Subject Test Ma thema tics—either L evel 1 or Level 2. We ha ve tried t o make
this a workable book. In other words, the book is set up so that regardless of
the level exam y ou’re ta king, you w ill be able to find t he ma terial n ecessary to
study and to take those tests that are most applicable to your level.
As a f u rt h er e n h a n ce m en t t o yo ur a b il it y t o p rep a re f or t h is e x a m , w e h a ve
prepared in-depth mathematics review material and highlighted those areas
tha t a re required primarily for Level 2, so tha t t hose studying for the Level 1
test can focus on only those areas that are appropriate.
Divided int o sections, the book begins w ith t w o diagnostic exams. There is one
each for Level 1 and Level 2. Take t hese exam s (and all of t he tests) under
simulated exam conditions, if you can. Find a quiet place in which to work, set
up a clock, a nd t ake th e test w ithout stopping. When you ar e finished, ta ke a
b r ea k a n d t h en g o b a ck a n d ch eck y ou r a n s w er s . Al w a y s r er ea d t h os e
qu e st ion s you g ot w ro n g , s in ce so m et im es you r e rrors com e f rom m e relymisreading the question. Again, double-check your answers, and if they’re still
not clear, read the appropriate section in the review material.
Once you’ve completed your diagnostic test(s), it ’s t ime to move on to the
review section. Study the m at erial car efully, but feel free to skim t he portion
of the review section that is easy for you.
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Then, ta ke the a ctual pra ctice tests. These simulated exams ar e designed t o give you a broad
spectrum of question types th at ar e similar to those you will f ind on t he a ctual S AT Subject
Tests: Ma thema tics. We suggest tha t, rega rdless of the level exam y ou are plann ing to ta ke, it
would be extremely helpful to tak e all of th e tests i n the book
. I f you ar e ta king Level 2, takingthe lower-level test will give you that much more practice for the exam. And if you are taking
Level 1, it would be helpful to test your skills and stretch your thinking to give you a stronger
grounding for the L evel 1 exam.
As you complete each exam, take some t ime to review your answers. We think you’ll f ind a
m a rk e d im provem e n t f rom t a k in g t h e d ia g n ost ic t e st s t o com p le t in g a l l of t h e f u ll-len g t h
practice tests. Always take the t ime to check the review section for clarificat ion, and if you
still don’t un derstan d t he ma terial, go to your teacher for help.
COMPREHENSIVE ANSWER EXPLANATIONSA t t h e e n d o f e a ch p ra ct ice se ssio n , re a d a l l t h e a n sw e rs a n d e x p la n a t io n s, e ve n f o r t h e
questions that you answered correctly. There are comprehensive explanations for every one of
the book’s 1,000+ questions! By reading t he an swer explana tions, you can learn from your
mistakes.
Ou r o b je ct ive is t o h e lp yo u d ra m a t ica l ly ra ise yo u r sco re s so t h a t yo u ca n m a x im iz e t h e
likelihood of getting into the college of your choice. And if you use this book properly, we can
help you reach that goal.
SPECIAL STUDY FEATURES
ARCO M aster th e SAT Su bject Test: Mat h L evels 1 and 2 is designed to be as user-friendly as
it is complete. To this end, it includes severa l feat ures t o ma ke your prepara tion much more
efficient.
Overview
Ea ch chapter begins w ith a bulleted overview list ing the t opics t o be covered in the chapter.
This will allow you to quickly target the areas in which you are most interested.
Summing It Up
Each chapter ends with a point-by-point summary that captures the most important points
conta ined in t he chapter. They a re a convenient wa y to review key points. As y ou work your
way through the book, keep your eye on the margins to find bonus information and advice.
Informat ion can be found in the following forms:
viii Before You Begin
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Note
Notes highlight critical informa tion about t he SAT Subject Test forma t—for example, tha t t he
a n sw e rs in t h e t e st a lw a ys g o fro m sm a ller t o la rg er.
Tip
Tips d ra w you r a t t e n t ion t o va lu a b le con ce pt s, a d vice a n d sh ort cu t s f o r t a ck lin g M a t h :
Levels 1 and 2. By reading the t ips you will learn how to approach different question types,
use process-of-eliminat ion techniqu es, pa ce yourself, a nd guess m ost effectively.
Alert!
Wherever you need to be car eful of a common pit fall or test-ta ker tr ap, y ou’ll f ind a n Alert! .
This information reveals a nd eliminat es the m isperceptions a nd w rong turn s so ma ny people
ta ke on the exam. B y ta king full adva nta ge of all features presented in ARCO M aster t he SAT
Subject Test: M ath L evels 1 an d 2 you will become much more comfortable with the SAT and
considerably more confident about getting a good score.
YOU’RE WELL ON YOUR WAY TO SUCCESS
Re m e m b e r t h a t k n o w le d g e is p o w e r. B y u sin g ARCO M aster the SAT Subject Test: M ath
L evels 1 and 2 you w ill be stu dying the most comprehensive SAT Subject Tests prepara tion
guide a va ilable a nd y ou will become extremely know ledgeable about the S AT. We look forw a rd
to helping you raise your scores and improve your college prospects.
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Before You Begin ix
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Top 10 Waysto Raise Your ScoreWhen it comes t o ta king t he SAT, some test -ta king skills w ill do you more good t ha n
others. There are concepts you can learn, techniques you can follow, and tricks you
can use t hat will help you to do your very best . H ere are our picks for t he top 10 wa ys
to ra ise your score:
1. Regardless of which plan you will follow, get started by reading
Chapter 1 to familiarize yourself with the test format.
2. Take the diagnostic practice tests.
3. Compute your category percentages to assess your relative strengths
and areas for improvement.
4. If you have time, read the book from cover to cover. S t a rt a t t he
b e g in n in g o r st a rt w it h t h e k in d o f qu e st io n o r t h e t o p ic t h a t yo u f in d m o st
difficult.
5. Complete the exercises in each chapter you read and assess your
performance against your diagnostic scores.
6. When you are one third of the way through your preparation, take a
practice test. Compare your scores w ith y our original r esults. Make sure you
are applying new test-taking strategies.
7. Revisit problematic chapters and chapter summaries. Th e n re a d
a d d it ion a l ch a p t e rs, d o e x ercises, a n d com p a re you r p ercen t a g e s w it h you r
original category percenta ges.
8. After you have reviewed all the chapters or all of your weaknesses,
take another practice test.
9. During the last phase of your review, go back over the practice tests.
10. The night before the SAT: RE LAX. You’ll be prepared.
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Petersons.com/publishing
Check out our Web site at www.petersons.com/publishing to see if there is any new information
regarding the tests and any revisions or corrections to the content of this book. We’ve made sure the
information in this book is accurate and up-to-date; however, the test format or content may have
changed since the time of publication.
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All About the SATSubject Test:
Math Levels 1 and 2
OVERVIEW
• Get to know the exam format
• When to use calculators
• How the test is scored
• Some test-wise strategies for SAT subject test success
• Educated guessing will boost your score!
• Getting ready: the night before and the day of the test
• Summing it up
GET TO KNOW THE EXAM FORMAT
Ea ch of the S AT Subject Tests in Ma thema tics (Level 1 an d Level 2) is simila r
in format. They both contain 50 multiple-choice questions. In addit ion, the
current versions of the tests includes a background q uestionna ire on the first
page. The College Board uses this information for stat ist ical purposes; your
answers will not affect your scores in any way.
The Level 1 examinat ion tests ma terial tha t covers t he following topics:
• Algeb ra (30%)
• G eometr y (plan e Euclidean, t hree-dimensional, coordina te) (38%)
• B a sic Trigonomet ry (8%)
• Algebra ic funct ions (12%)
• E le m en t a ry st a t ist ics (p rob a b ili t y, cou n t in g p ro blem s, d a t a in t erp ret a -
tion, mea n, m edian , a nd mode) (6%)
• M iscella n e ou s t o pics (log ic, n u m b er t h e ory, a ri t h m e t ic, g e om e t ric
seq uen ces) (6%)
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h a p
t er 1
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The Level 2 examinat ion tests ma terial tha t covers th e following topics:
• Algeb ra (18%)
• G eometr y (coordina te a nd th ree-dimensional) (20%)
• Tr igon omet ry (20%)
• Fu nct ions (24%)
• St at istics (probability, permuta tions, combinat ions) (6%)
• Miscella neous topics (logic a nd proof, num ber th eory, sequences, limit s) (12%)
You ca n q uickly see where your focus sh ould be for ea ch level, depending upon the percenta ge
of questions that are on the tests.
WHEN TO USE CALCULATORS
You ma y use a lmost a ny scientific or gra phic calculator, and it is est imat ed tha t y ou will f ind
it useful, a nd often necessar y, for a bout 40 percent of th e questions on the Level 1 exam and
for about 60 percent on the Level 2 exam. You should, therefore, be very familiar with the
operation of the calculat or you plan to bring to th e exam .
HOW THE TEST IS SCORED
While it ’s not imperative that you completely understand how the test is scored, since the
p ro ce ss sh o u ld n ’ t d e t e r yo u f ro m t ryin g t o d o yo u r b e st , yo u a re p ro b a b ly a w a re t h a t t h e
scores are reported on the 200–800 range.
Ea ch question a nsw ered correctly receives one point . You lose a fraction of a point for each
incorrect answer. However, you do not lose points if you don’t answer a question. (If you skip
an y a nsw ers, make sure that the next question you answ er is f illed in on your answ er page in
the correct space.) Thus, it ma kes sense to guess at those questions t hat you don’t know, a nd
of course, as w ith most m ultiple-choice questions, you should use t he process of elimina tion to
increase the odds of guessing correctly. The more choices you eliminate, the better your odds
ar e for choosing the correct an swer.
SOME TEST-WISE STRATEGIES FOR SAT SUBJECT TEST SUCCESS
What makes some people better test-takers than others? The secret isn’t just knowing the
su b je ct ; i t ’s k n ow in g sp ecif ic t e st -t a k in g st ra t e gies t h a t ca n a d d u p t o e xt ra p oin t s . Th is
means psyching out the t est , knowing how t he test-ma kers think a nd w hat they’re looking for,
and using this knowledge to your advantage. Smart test-takers know how to use pacing and
guessing t o add points to their score.
4 PART I: SAT Subject Test Basics
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Pace Yourself
You know there a re 50 questions in one of the mat h sections a nd t hey need to be answ ered in
60 minutes. That means tha t y ou ha ve 1 minute and 10 seconds to answ er each question. B ut
sma rt t est-ta kers know t hat ’s not the best w ay to use their t ime. If you use less tha n a minuteto answer the easier questions, you’ll have extra t ime to help you answer the more difficult
ones. Tha t ’s wh y lear ning t o pace yourself is so importa nt .
Question Sets Usually Go from Easiest to Most Difficult—You Should, Too
SAT questions follow the pattern of easiest to hardest . Work your way through the earlier,
e a sier qu e st ion s a s qu ick ly a s you ca n . Th a t w a y you ’l l h a ve m ore t im e f o r t h e la t e r, m o re
difficult ones.
B ut t wo w ords of caut ion. Wha t ma y be easy t o the test-wr iter ma y not be to you. Don’t pa nic
if question 3 seems h ar d. Try to w ork through it , but don’t spend t oo much t ime on it if i t ’s at o pic su ch a s f a ct orin g t h a t h a s ju st n e ve r b e en e a sy f or you t o u n d e rst a n d . S e con d , w ork
quickly but carefully. Don’t work so fast that you make a silly mistake and lose a point that
you should ha ve aced.
You Can Set Your Own Speed Limit
All right , how will you know what your speed limit is? Use the practice tests to check your
timing and see how it affects your answers. I f you’ve answered most of the questions in the
time limit , but also have a lot of incorrect answers, better slow down. On the other hand, if
you are very accurate in your answers but aren’t answering every question in a section, you
can probably pick up th e pace a bit .
It’s Smart to Keep Moving
It’s hard to let go, but sometimes you have to. Don’t spend too much time on any one question
before you’ve tried a ll the questions in a section. There ma y be questions later on in t he test
that you can answer easily, and you don’t want to lose points just because you didn’t get to
them.
You Don’t Have to Read the Directions
Wha t? Yes, you read it correctly th e first time—you don’t ha ve to read th e directions. L ook, bythe t ime you actua lly sit down to t ake the S AT Subject Test , you’ve read this book, y ou’ve
taken all the practice tests you could find, and you’ve read enough SAT directions to fill a
l ib ra ry. S o w h e n t h e e x a m clo ck st a rt s t ick in g , d o n ’ t w a st e t im e re re a d in g d ire ct io n s yo u
alrea dy know. Instea d, go directly to Question 1.
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Chapter 1: All About the SAT Subject Test: Math Levels 1 and 2 5
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You’re Going to Need a Watch
If you’re going to pace yourself , you need to keep track of the t ime—and what if there is no
clock in your room or if th e only clock is out of your line of vision? Tha t’s w hy it’s a good idea
to bring a wa tch to the test . Aw ord of wa rning: don’t use a w at ch alarm or your w at ch will endup on the proctor’s desk.
EDUCATED GUESSING WILL BOOST YOUR SCORE!
T h e f ra ct io n a l d e d u ct io n f o r w ro n g a n sw e rs m a k e s ra n d o m g u e ssin g a w a sh — st a t ist ica l ly
speaking, you’re unlikely to change your score. This means that if you come to a question that
you have a bsolutely no idea how t o answ er, you’re probably better off skipping it and moving
on , ra t h e r t h a n ju st ch oosin g a n a n sw e r a t ra n d om .
Although random guessing won’t help you, anything better than random guessing will . Onmost questions, you should be able to guess better t han ra ndomly by using common sense and
the process-of-eliminat ion techniques tha t ar e developed throughout this book. Even if y ou
aren’t certain which answer is correct , you might be certain that one or more of the answer
choices is definitely wrong. If you can knock out one choice out of five, you have a 25 percent
chance of guessing correctly. If you can knock out two choices, the odds go up to 331
3 percent .
If y ou can kn ock out t hree, you ha ve a 50/50 cha nce of guessing t he right an sw er. With odds
like this, it ma kes sense to guess, especially wh en you realize tha t a single correct guess can
ra ise your scaled score a s much a s 10 points.
Obviously, the better you get at eliminating implausible choices, the more points you will pickup from educated guessing. But no matter what , if you have t ime to read through a question
and eliminate at least one choice, it is always to your benefit to guess.
Don’t worry about the fact that you will probably get the question wrong, because you don’t
need to guess correctly on too many questions to gain points. As long as you are guessing
better t han ra ndomly, you w ill do considerably better.
GETTING READY: THE NIGHT BEFORE AND THE DAY OF THE TEST
If you follow the guidelines in this book, you will be extremely well prepared for the SAT
Subject Test . You will know the format inside and out; you will know how t o approach every
type of question; you will ha ve worked har d to strengthen your weak a reas; a nd you will have
taken multiple practice tests under simulated testing conditions. The last 24 hours before the
SAT Subject Test is not t he t ime to cram—it’s a ctually the t ime to r elax.
Tha t sa id, there a re plenty of steps you can ta ke over the fina l 24 hours t o get ready. For one
thing, don’t do anything too stressful. On the night before the big day, find a diversion to keep
yourself from obsessing a bout the SATS ubject Test. Ma ybe sta y home and w a tch some of your
6 PART I: SAT Subject Test Basics
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ALERT!Don’t spin your
wheels by
spending too
much time on
any one question.
Give it some
thought, take
your best shot,
and move along.
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f a vo ri t e t e le visio n sh o w s. Or g o o u t t o a n e a rly m o vie . Or t a lk f o r h o u rs a n d h o u rs o n t h e
phone about another subject . Do whatever is best for you. J ust make sure you get plenty of
sleep.
You should also lay out the following items before you go to bed:
• Registration ticket: Un le ss yo u a re t a k in g t h e t e st a s a “st a n d b y” t e st e r , yo u sh o u ld
ha ve received one of t hese in the ma il.
• Identification: A driver’s license is prefera ble, but an ything wit h a picture w ill do.
• Pencils: Make sure you bring at least three number-2 pencils; those are the only pencils
t h a t t h e m a ch in es ca n re a d .
• Calculator: B oth tests r equire the use of a calculator. You should bring a calculator w ith
which you are most familiar, but don’t bring a calculator that makes noise, requires an
electrical outlet, or is part of a cell phone.
• Wristwatch: Your classroom should have an operational clock, but if it doesn’t, you want
to come prepared. Again, don’t w ear a wa tch tha t beeps, unless you can t urn off the ala rm
function. You w on’t be allowed to w ear a noise-ma king w at ch during t he exam.
Make sure you allow enough t ime to a rrive at the test sit e at least 15 minutes before the sta rt
t ime. You don’t wa nt to ra ise your level of a nxiety by ha ving to rush to get there.
I n t h e m or n in g , t a k e a s h ow e r t o w a k e u p a n d t h en e a t a s en s ib le b r ea k f a s t . I f y o u a r e a
person who usua lly eats breakfast , you should probably ea t y our customary meal. I f y ou don’t
u su a lly e a t b re a k f a st , d o n ’ t g o rg e yo u rse lf o n t e st d a y, b e ca u se i t w il l b e a sh o ck t o yo u r
system. Eat something light (like a granola bar and a piece of fruit) and pack a snack.
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SUMMING IT UP
The following information is the foundation on which you’re going to build as you prepare for
the SAT Subject Test: M at h L evels 1 an d 2.
• Lear ning the SAT quest ion ty pes is the best wa y to prepare for the SAT. Knowing the test
format and question types will relieve test anxiety because you’ll know exactly what to
expect on test day.
• You may use a calculator on t he SAT, but wh ile it ma y be helpful for some problems, it
isn’t absolutely n ecessary for an y of th em. So use your calculator, but don’t rely on it too
much.
• Questions are usually arra nged from easiest to most difficult .
• Every S AT question is worth 1 point , wh ether it is an easy question or a difficult one. So
nail the ea sier questions—and quickly a ccumulat e points.
• Fill in the an sw er bubbles cleanly a nd completely. Otherw ise you won’t get credit for your
a n sw e rs.
• Ra ndom guessing will have no effect on your score, but educa ted guessing can boost your
score. So if you’ve read t hrough a question and can eliminate a t least one an swer, guess!
• P ace yourself and move through the test relat ively quickly. But you can get a very good
score even if you don’t answer every question.
• Relax th e day before the SAT, but a lso be sure you’re prepared.
• Assemble the supplies you will need for t he test .
• P ick out w hat you’ll wear a nd remember to layer your clothes.
• B e sure your calculator has fresh batt eries.
• On the morning of the test , eat breakfast , pack your snack, and leave for the test site in
plenty of t ime t o get t here 15 minutes before the st ar t t ime.
Remember that because you are working through this book, you’re giving yourself the best
prepara tion a va ilable for succeeding on th e SAT Subject Test: Ma th Levels 1 and 2. Let your
prepar at ion give you th e confidence you need to be calm and focused dur ing th e test .
8 PART I: SAT Subject Test Basics
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PART II. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DIAGNOSING STRENGTHSAND WEAKNESSES
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPTER 2 Practice Test 1:
Diagnostic Level 1
CHAPTER 3 Practice Test 2:
Diagnostic Level 2
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Practice Test 1:
Diagnostic Level 1
B efore you begin preparing for t he SAT, it’s importa nt to know your st rengt hs
an d t he a reas wh ere you need improvement. Taking the D iagnostic Test in
this chapter and then working out your scores will help you determine how
you should a pportion y our study t ime.
PREPARING TO TAKE THE DIAGNOSTIC TESTIf possible, ta ke the test in one sit t ing. Doing this w ill give you an idea of how
it feels to t ake t he test in one hour. You will a lso get a sense of how long y ou
can spend on each q uestion, so you can begin t o work out a pa cing schedule for
yourself.
First , assemble all the things you will need to take the test . These include:
• Lined paper for the essay, at least t wo sheets
• Number 2 pencils, at least three
• A calculator with fresh bat teries
• A timer
• The answ er sheet , page 15
S e t t h e t im e r f o r o n e h ou r. S t ick t o t h e t im e , so yo u a re sim u la t in g t h e re a l
t e st . A t t h is p o in t , i t ’s a s im p o rt a n t t o k n o w h o w m a n y qu e st io n s yo u ca n
answer in the t ime allotted as it is to answer questions correctly.
PRACTICE TEST 1: DIAGNOSTIC LEVEL 1
Wh il e y ou h a v e t a k en m a n y s t a n da r d iz ed t es t s a n d k now t o b la ck en
completely the ovals on th e answ er sheets an d t o era se completely a ny errors,
th e instru ctions for t he SAT Subject Test: Ma thema tics Level 1 exam differs in
t h re e im p o rt a n t w a ys f ro m t h e d ire ct io n s f o r o t h e r st a n d a rd iz e d t e st s yo u
ha ve ta ken. You need to indicat e on th e answ er key which test you are t aking.
The instructions on th e answ er sheet of the actua l test will tell you to fill out
the top portion of the answer sheet exactly as shown.
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r a ct i c et e s t 1
11
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1. P rin t M ATHE M ATI CS L E V E L 1 o n t h e l in e t o t h e r igh t u n d er t h e w o rd s Subject
Test (print).
2. I n t h e sh a d e d box la b e le d Test Code fill in four ovals:
—Fill in oval 3 in t he row labeled V.
—Fill in oval 2 in t he row labeled W.
—Fill in oval 5 in the r ow la beled X.
—Fill in oval A in the row labeled Y.
—Leave the ovals in row Q blank.
Test Code
V ÞO1 ÞO2 Þ ÞO4 ÞO5 ÞO6 ÞO7 ÞO8 ÞO9
W ÞO1 Þ ÞO3 ÞO4 ÞO5 ÞO6 ÞO7 ÞO8 ÞO9
X ÞO1 ÞO2 ÞO3 ÞO4 Þ Y Þ ÞOB ÞOC ÞOD ÞOE
Q ÞO1 ÞO2 ÞO3 ÞO4 ÞO5 ÞO6 ÞO7 ÞO8 ÞO9
Subject Test (print)
MATHEMATICS LEVEL 1
D u rin g t h e a ct u a l t e st , w h e n e ve ryo n e h a s co m p le t e d f i l l in g in t h is p o rt io n o f t h e a n sw e r
s h e e t , t h e s u p e r v i s o r w i l l t e l l y o u t o t u r n t h e p a g e a n d b e g i n t h e M a t h e m a t i c s L e v e l 1
examination. The answer sheet has 100 numbered ovals on the sheet , but there are only 50
multiple-choice questions on the test , so be sure to use only ovals 1 to 50 to record your
a n sw e rs.
REFERENCE INFORMATION
The follow ing informa tion is for your r eference in ans w ering some of the qu estions on this test .
Volume of a right circular cone with ra dius r and height h :
V 51
3pr 2h
L a t e ra l a re a o f a r ig h t circu la r co n e w it h circu m f e re n ce o f t h e b a se c a n d s l a n t
height l :
S 51
2cl
S u rf a ce a re a o f a sp h e re w it h ra d iu s r :
S 5 4pr 2
Volume of a pyramid with base area B and height h :
V 51
3B h
Volume of a sphere w ith r adius r :
V 543pr
3
12 PART II: Diagnosing Strengths and Weaknesses
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Notes
You will need a calculator to a nsw er some (but not a ll) of the q uestions. You must
decide whether or not t o use a calculator for each question. You must use a t least a
s ci en t if ic ca l cu la t or ; y ou a r e per m it t ed t o u se g r a ph in g or pr og r a m ma b lecalculators.
Degree measure is the only a ngle measure used on this test . B e sure your calculator
is set in degree mode.
The figures tha t accompany questions on t he test ar e designed t o give you informa-
tion that is useful in solving problems. They are drawn as accurately as possible
E X CE PT w h e n st a t e d t h a t a f ig u re is n o t d ra w n t o sca le . Un le ss o t h e rw ise in d i-
cated, a ll f igures lie in plan es.
The doma in of an y funct ion f is a ssumed to be the set of all real numbers x for which
f (x ) is a real number, unless otherwise specified.
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Chapter 2: Practice Test 1: Diagnostic Level 1 13
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ANSWER SHEET PRACTICE TEST 1: DIAGNOSTIC LEVEL 1
1. OA OB OC OD OE
2. OA OB OC OD OE
3. OA OB OC OD OE
4. OA OB OC OD OE
5. OA OB OC OD OE
6. OA OB OC OD OE
7. OA OB OC OD OE
8. OA OB OC OD OE
9. OA OB OC OD OE
10. OA OB OC OD OE
11. OA OB OC OD OE
12. OA OB OC OD OE
13. OA OB OC OD OE
14. OA OB OC OD OE
15. OA OB OC OD OE
16. OA OB OC OD OE
17. OA OB OC OD OE
18. OA OB OC OD OE
19. OA OB OC OD OE
20. OA OB OC OD OE
21. OA OB OC OD OE
22. OA OB OC OD OE
23. OA OB OC OD OE
24. OA OB OC OD OE
25. OA OB OC OD OE
26. OA OB OC OD OE
27. OA OB OC OD OE
28. OA OB OC OD OE
29. OA OB OC OD OE
30. OA OB OC OD OE
31. OA OB OC OD OE
32. OA OB OC OD OE
33. OA OB OC OD OE
34. OA OB OC OD OE
35. OA OB OC OD OE
36. OA OB OC OD OE
37. OA OB OC OD OE
38. OA OB OC OD OE
39. OA OB OC OD OE
40. OA OB OC OD OE
41. OA OB OC OD OE
42. OA OB OC OD OE
43. OA OB OC OD OE
44. OA OB OC OD OE
45. OA OB OC OD OE
46. OA OB OC OD OE
47. OA OB OC OD OE
48. OA OB OC OD OE
49. OA OB OC OD OE
50. OA OB OC OD OE
------------
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--------------------------------------
--
✁ an s w
er s h e e
t
15
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MATHEMATICS LEVEL 1
Directions: F or e a ch of t h e f ol low i n g p rob lem s , i de nt i fy t h e B E S T a n s w e r of t h e
choices given. If the exact numerical value is not one of the choices, select the answ ertha t is closest t o this va lue. Then fill in th e corresponding oval on t he a nsw er sheet .
1. I f x 5 2, then (x 2 1)(2x 2 3) 5
(A) 1(B) 3(C) 21(D) 0(E) 23
2. In t he figure below, the side of theinside square is x ; the side of the
outside square is x 1 2. How muchgreater is the area of the outside
squ a re t h a n t h e a re a o f t h e in sid e
squ a re ?
(A) 4(B) 4x (C) 4x 1 4(D) 4x 1 1(E) x 1 4
3. Given the figure below, what is thea re a in t e rm s of a a n d b of the large
squ a re ?
c
(A) a 2 1 b 2
(B) (a 1 b )2
(C) (a 2 b )2
(D) c 2
(E) (a 2 2b )2 1 b 2
4. What is the sine of 30 degrees?
(A)1
2
(B)3
2
(C) =2
2
(D) =3
2
(E) 2
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5. A gumball ma chine conta ins 40 bluegum balls, 20 red gumba lls, 15 green
gumballs, a nd 25 purple gumballs.
What is the probability that a person
gets a red gumball?(A) .10(B) .20(C) .25(D) .15(E) .30
6. Find x if x
41
~x 1 1!
3 5
3
2.
(A) 17
2
(B) 15
7
(C) 2
(D) 1
(E) 22
7. At what point(s) does f(x) 5x 2 1 3x 1 2 intersect the x -axis?
(A) (2, 0) a nd (1, 0)(B) (0, 2) a nd (0, 1)(C) (0, 21) and (0, 22)(D) (21, 0) and (22, 0)
(E) (21, 0) and (2, 0)
8. Sequential a rra ngements of blocks areformed according to a pattern. Each ar-
ra ngement aft er the first one is gener-
a t e d b y a d d in g a ro w o f squ a re s t o t h e
b ot t o m of t h e p reviou s a rra n g em e n t ,a s sh ow n in t h e f ig ure t o t h e r ig h t . I f
this pa tt ern continues, w hich of the fol-
lowing gives t he number of squa res in
t he n t h a rra n g e m e n t ?
(A) 2n 2
(B) 2(2n 2 1)
(C) n ~n 1 1!
2
(D) n (n 1 1)
(E) n 2 1 1
9. I f t h e d ist a n ce b et w e en t h e t w opoints P (a , 3) and Q (4, 6) is 5, t hen
find a .
(A) 0(B) 24(C) 8
(D) 24 a n d 0(E) 0 a n d 8
10. Line m h a s a n e ga t ive slop e a n d anegative y -intercept. Line n is
parallel to line m a n d h a s a p osit ive
y -int ercept. The x -intercept of n
m u st b e
(A) n e ga t ive a n d g re a t e r t h a n t h ex -intercept of m
(B) n e ga t ive a n d le ss t h a n t h ex -intercept of m
(C) zero(D) p osi t ive a n d g re a t e r t h a n t h ex -intercept of m
(E) p osi t ive a n d less t h a n t h ex -intercept of m
18 PART II: Diagnosing Strengths and Weaknesses
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11. Given the list of numbers {1, 6, 3, 9,16, 11, 2, 9, 5, 7, 12, 13, 8}, w ha t is
the median?
(A) 7
(B) 8(C) 9(D) 11(E) 6
12. I f f(x) 5 x 1 1 a n d g(x) 5 x 1 1, thenfind f(g(x) ).
(A) (x 1 1)2 1 1(B) x 2 1 x 1 2(C) x 1 2(D) x 3 1 x 2 1 x 1 1(E) x 2 1 2x 1 2
13. The equation x 2 1 9 5 2y 2 i s a nexample of which of the following
curves?
(A) hyperbola(B) circle(C) ellipse(D) parabola(E) line
14. I f x 1 1 , 0 then ?x ? is
(A) 0(B) x 1 1
(C) 2x (D) 2x 2 1(E) x
15. The an gle of the sun a bove the horizonis 27.5 degrees. Find th e approxima te
length of the shadow of a person who
is 4.75 feet ta ll.
(A) 4.75(B) 2.47(C) 4.65(D) 9.12
(E) 4.86
16. Define the x -coordina te of themidpoint between (21, 1) and (4, 1)a s m a n d d e f in e t h e y -coordinate of
the midpoint between (4, 1) and (4, 3)
a s n
. Wh a t a re t h e x
- a n d y
-coordi-nates of (m , n )?
(A) S52, 32D(B) S52, 2D(C) S32, 32D(D) S32, 2D(E) (4, 1)
17. What is the slope of the line that isperpendicular to y 2 2x 5 1?
(A) 2
(B) 22
(C) 1
2
(D) 21
2
(E) 1
18. Trees are t o be plant ed inside acircular tree orchard so that there
ar e 5 trees per squa re meter. The
circumference of the tree orchard is
30 meters. I f trees are available only
in a llotments of packages of 6, how
m a n y a l lot m e n t s w ill t h e ca re t a k e r
need to purchase?
(A) 59(B) 117(C) 58
(D) 60(E) 118
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19. P lace the following list of numberswit h t he given labels in order of
g re a t e st t o le a st .
F 5 (1010)10
G 5 10101010
H 510100
1010
I 5 10
(A) F, G, H , I (B) G, F, H , I (C) F, H , G, I (D) H , F, G, I (E) G, H , F, I
20. The statement “y va ries inverselyw it h t h e squ a re of x ” m e a n s
(A) y 5 k x
(B) y 5k
x
(C) y 5 k
(D) y 5 k
x 2
(E) y 5 k x 2
21. Suppose one takes a tetra hedronA B C D w i t h b a s e A CD a s sh o w n
below and combines it with another
tetra hedron by connecting their
corresponding ba ses. How m an y
dist inct edges does the r esult ing
object ha ve?
C
B
DA
(A) 9(B) 12(C) 10(D) 11(E) 8
22. The area of the para llelogra m A B C D below is
(A) 20(B) 10
(C) 5=3(D) 10=3
(E) 1823. I f f (x ) 5 3x 2 1 a n d i f f 21 is t h e
inverse function of f , w h a t i s f 21(5)?
(A) 18
(B) 4
3
(C) 5
3
(D) 2
(E) 0
24. I f (x 2 1)x 2
5 1 a n d x is n o t e qu a l t o1, then all the possible values of
x a re
(A) 0(B) 2(C) 22(D) 0 a n d 2(E) None of the a bove
25. Wha t is t he sum of the first 40 evenpositive integers?
(A) 1,600(B) 1,560(C) 820(D) 1,640(E) 400
20 PART II: Diagnosing Strengths and Weaknesses
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ANSWER KEY AND EXPLANATIONS
1. A
2. C3. A
4. A
5. B
6. C
7. D8. C
9. E
10. D
11. B
12. C13. A
14. C
15. D
16. D
17. D18. D
19. C
20. D
21. A
22. A23. D
24. D
25. D
1. The correct answer is (A). I f x 5 2 then (x 2 1)(2x 2 3) 5 (2 2 1)(2(2) 2 3) 5 1(1) 5 1.
2. The correct answer is (C). The area of the larger square is (x 1 2)2, a n d t h e a re a o ft h e sm a ller squ a re is x 2. Hence, the area of the larger square is (x 1 2)2 2 x 2 5 4x 1 4g rea t e r t h a n t h e a re a of t h e sm a ller squ a re .
3. The correct answer is (A). Use t h e P yt h a g o rea n t h e ore m o n o n e of t h e t r ia n g les t oge t c 2 5 a 2 1 b 2.
4.The correct answer is (A). U se a 30-60-90 special tr ian gle to g et s in(30) 5
1
2.
5. The correct answer is (B). The probability that a person gets a red gumball is just
the number of red gumballs divided by the total number of gumballs. That is, 20
100.
6. T he correct answer is (C). I f x
41
~x 1 1!
3 5
3
2 then add the two algebraic fractions by
first gett ing a common denominat or of 12 and then a dding the t wo fra ctions. The result
o f t h i s i s 7x 1 4
12 5
3
2. N ow m u lt i pl y b ot h s id es of t h e e q u a t i on b y 12 t o cl ea r t h e
denominators. The result of this is 7x 1 4 5 18, and now solving for x , w e g et t h e
desired result .
7. The correct answer is (D). S et f (x ) 5 0 a n d s ol ve b y f a ct or i ng a n d u s in g t h ezero-fact or property. Tha t is, f (x ) 5 (x 1 2)(x 1 1) 5 0 then x 1 2 5 0 a n d x 1 1 5 0,w h ich sa ys t h e x -intercepts are (22, 0) an d (21, 0).
8. The correct answer is (C). Since we ar e adding t he numbers from 1 up to the number
t h a t n equals, we use the formula n ~n 1 1!
2 .
9. The correct answer is (E). The distan ce between the t wo points P and Q is defined to
b e 5. Th a t is , =~a 2 4!2 1 ~3 2 6!2 5 5. To f in d t h e a n sw e r, w e n e ed t o so lve t h isequat ion for a . S o, a f t er s q u a r i ng b ot h s id es a n d s im pl if y in g , w e g et t h e eq u a t i on
(a 2 4)2 5 16. So, a 5 0 a n d 8.
10. The correct answer is (D). If l ine m h a s a n e ga t ive slop e a n d a n e ga t ive y -intercept,i t h a s a n e ga t ive x -intercept. Since line n is par allel to line m with a posit ive y -intercept
w e k n ow t h a t l ine n will have a posit ive x -intercept. So, the answer follows.
11. The correct answer is (B). G iven t he list , f irst wr ite the list in increasing order fromt h e le a st n u m b e r t o t h e g re a t e st n u m b e r a n d t h e n f in d t h e n u m b e r t h a t h a s a n e qu a l
n u m ber of n u m be rs on e a ch s id e. Th u s, w e f in d t h a t 8 i s t h e n u m b er t h a t h a s 6
n u m b ers le ss t h a n i t a n d 6 g rea t e r t h a n i t .
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12. The correct answer is (C). E v a l u a t e f a t g (x ) t o g e t f (g (x )) 5 g (x ) 1 1 , a n d n o w substitute g (x ) to get the answer.
13. The correct answer is (A). J ust r ewrite th e equation to 2y 2 2 x 2 5 9 to see that it is
a hyperbola. The equa tion 2y
2
2 x 2
5 9 ca n b e w ri t t e n a s
y 2
1 2
x 2
2 5
9
2, or equivalently,y
2
9
2
2x
2
9 5 1, which represents the general formula of a h yberbola.
14. The correct answer is (C). I f x 1 1 , 0 t h e n x , 21. S o , t h e a b so lu t e va lu e o f anegative number is defined to be the sa me number but posit ive. So, ?x ? 5 2x .
15. The correct answer is (D). G iven the informa tion, w e can dra w the following t riangle:
T h e a n sw e r ca n b e f o u n d b y lo o k in g a t t h e t a n g e n t o f 27.5 a n d so lvin g f o r x . The
equation becomes tan 27.5° 54.75
x , so x 5
4.75
tan27.5°
16. The correct answer is (D). Ca lcu la t e t h e a ve ra g e o f t h e x coordinates of 21 a n d 4(define as m ) a n d a lso ca lcula t e t h e a ve ra g e o f t h e y coordina tes 1 and 3 (define a s n ).
So, (m , n ) is given by choice (D).
17. The correct answer is (D). Write in s lope-intercept form to get the slope of th e givenl i n e t o b e 2 5 m 1. T h u s, t h e l in e t h a t is p e rp e n d icu la r t o t h e g ive n l in e h a s slo p e
21
m 15 2
1
2.
18. The correct answer is (D). Circumference is given by the formula C 5 2pr . So, using
the given information, we can calculate tha t r 5 30
~2p!. Now plug r into A 5 pr 2 to get th e
ar ea in meters squar ed. We know t ha t th ere ar e 5 trees per squar e meter a nd there are
6 trees in a package, so multiply the last result by 5 and divide by 6. That is, 5A
6 '
5
6~71.62! ' 59.68. Therefore, we would need to buy 60 packages.
19. The correct answer is (C). By exponent rules, F 5 10100, G 5 1020, H 5 1090, a n dI 5 10. So, the order of greatest to least is choice (C).
20. The correct answer is (D). Value of y va rie s in ve rse ly w it h t h e squ a re o f x , w h ich
m e a n s y 5 k
x 2.
21. The correct answer is (A). One tetra hedron ha s 6 edges, an d if w e place tw o togethera lo n g t h e b a ses of t h e t w o t e t ra h e d ron s, t h e y sh a re 3 com m on e d ge s f or a t o t a l o f
12 2 3 5 9 edges.
22. The correct answer is (A). The area of the parallelogram is just 4(5) 5 20.
22 PART II: Diagnosing Strengths and Weaknesses
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23. The correct answer is (D). f 21(5) implies that f (x ) 5 5, wh ich sa ys 3x 2 1 5 5 or x 5 2.
24. The correct answer is (D). For (x 2 1)x 2
5 1, either x 2 1 5 61 or x 2 5 0 because theonly va lues th at can be ra ised to a n on-zero power to yield 1 a re 11 a n d 21. x 2 1 5 1⇒ x 5 2; x 2 1 5 21 ⇒ x 5 0; x 2 5 0 ⇒ x 5 0; hence x 5 2 or x 5 0.
25. The correct answer is (D). 2 1 4 1 6 1 .. . 1 80 5 2[1 1 2 1 3 1 .. . 1 40]. The sum
of t he first n positive integers is n ·~n 11!
2 , so t h e t o t a l is 2F40·41
2 G 5 1,640.
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Practice Test 2:
Diagnostic Level 2
B efore you begin preparing for t he SAT, it’s importa nt to know your st rengt hs
an d t he a reas wh ere you need improvement. Taking the D iagnostic Test in
this chapter and then working out your scores will help you determine how
you should a pprotion y our study t ime.
PREPARING TO TAKE THE DIAGNOSTIC TESTIf possible, ta ke the test in one sit t ing. Doing this w ill give you an idea of how
it feels to t ake t he test in one hour. You will a lso get a sense of how long y ou
can spend on each q uestion, so you can begin t o work out a pa cing schedule for
yourself.
First , assemble all the things you will need to take the test . These include:
• Lined paper for the essay, at least t wo sheets
• Number 2 pencils, at least three
• A calculator with fresh bat teries
• A timer
• The answ er sheet , page 29
S e t t h e t im e r f o r o n e h ou r. S t ick t o t h e t im e , so yo u a re sim u la t in g t h e re a l
t e st . A t t h is p o in t , i t ’s a s im p o rt a n t t o k n o w h o w m a n y qu e st io n s yo u ca n
answer in the t ime allotted as it is to answer questions correctly.
PRACTICE TEST 2: DIAGNOSTIC LEVEL 2
Wh il e y ou h a v e t a k en m a n y s t a n da r d iz ed t es t s a n d k now t o b la ck en
completely the ovals on th e answ er sheets an d t o era se completely a ny errors,
th e instru ctions for t he SAT Subject Test: Ma thema tics Level 1 exam differs in
t h re e im p o rt a n t w a ys f ro m t h e d ire ct io n s f o r o t h e r st a n d a rd iz e d t e st s yo u
ha ve ta ken. You need to indicat e on th e answ er key which test you are t aking.
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r a ct i c et e s t 2
25
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The instructions on t he a nswer sheet of the a ctual t est w ill tell you t o fill out t he top portion
of the answer sheet exactly as shown.
1. P rin t M ATHE M ATI CS L E V E L 2 o n t h e l in e t o t h e r igh t u n d er t h e w o rd s Subject
Test (print).
2. I n t h e sh a d e d box la b e le d Test Code fill in four ovals:
—Fill in oval 5 in t he row labeled V.
—Fill in oval 3 in t he row labeled W.
—Fill in oval 5 in the r ow la beled X.
—Fill in oval E in the row labeled Y.
—Leave the ovals in row Q blank.
Test Code
V ÞO1 ÞO2 ÞO3 ÞO4 Þ ÞO6 ÞO7 ÞO8 ÞO9
W ÞO1 ÞO2 Þ ÞO4 ÞO5 ÞO6 ÞO7 ÞO8 ÞO9
X ÞO1 ÞO2 ÞO3 ÞO4 Þ Y ÞOA ÞOB ÞOC ÞOD Þ
Q ÞO1 ÞO2 ÞO3 ÞO4 ÞO5 ÞO6 ÞO7 ÞO8 ÞO9
Subject Test (print)
MATHEMATICS LEVEL 2
Dur ing the actu a l test, wh en everyone has completed filling in this port ion of th e answ er sheet,
the supervisor w ill tell you to turn the page a nd begin the Ma thema tics Level 2 exam inat ion.
The answer sheet has 100 numbered ovals on the sheet, but there are only 50 multiple-choice
questions on t he test , so be sure to use only ovals 1 t o 50 to record your a nsw ers.
REFERENCE INFORMATION
The follow ing informa tion is for your r eference in ans w ering some of the qu estions on this test .
Volume of a right circular cone with ra dius r and height h :
V 51
3pr 2h
L a t e ra l a re a o f a r ig h t circu la r co n e w it h circu m f e re n ce o f t h e b a se c a n d s l a n t
height l :
S 51
2cl
S u rf a ce a re a o f a sp h e re w it h ra d iu s r :
S 5 4pr 2
Volume of a pyramid with base area B and height h :
V 51
3B h
Volume of a sphe