year 8 mid exam paper 1

8
MOCK 2 EXAMINATION MATHEMATICS 1 2 212/1/PNCT SMYSHHB 1. Write the correct number to go in each box. (a) 7.6 + = 7.66 (b) quarter of 48 = (c) 7 = 49 1 [3] 2. Look at the circular board below. Each section has a number between 1 and 10. Using only the numbers on the board, write down (a) factors of 20 Answer (a): ……………………………… [1] (b) highest common factor of 8 and 16 Answer (b): ……………………………… [1] (c) odd composite number Answer (c): ……………………………… [1] 3. (a) Find the value of (i) 9 4 1 2 Answer (a)(i): ……………………………… [1]

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  • MOCK 2 EXAMINATION MATHEMATICS 1

    2

    212/1/PNCT SMYSHHB

    1. Write the correct number to go in each box.

    (a) 7.6 + = 7.66

    (b) quarter of 48 =

    (c) 7 = 49

    1

    [3]

    2. Look at the circular board below. Each section has a number between 1 and 10. Using only the numbers on the board, write down

    (a) factors of 20 Answer (a): [1]

    (b) highest common factor of 8 and 16

    Answer (b): [1]

    (c) odd composite number Answer (c): [1]

    3. (a) Find the value of

    (i) 94

    12

    Answer (a)(i): [1]

  • MOCK 2 EXAMINATION MATHEMATICS 1

    3

    212/1/PNCT SMYSHHB

    (ii) 10 + 6(-3) 10 =

    Answer (a)(ii): [1] (b) (i) Express 2 3 2 2 3 5 5 5 7 in index notation.

    Answer (b)(i): [1] (ii) Express 320 as a product of prime factor.

    Answer (b)(ii): [1]

    4. Here are five numbers written in standard form. 1.75 102 7.03 103 6.11 10-1 8.78 100 9.09 10-2

    (a) Write down the smallest number.

    Answer (a): [1]

    (b) List the number in descending order.

    Answer (b): , , , , [2]

    5. (a) Simplify 15xy 4 8xy + 6

    Answer (a): [1] (b) Factorize completely 3ce 6de + cf 2df

    Answer (b): [2]

  • MOCK 2 EXAMINATION MATHEMATICS 1

    4

    212/1/PNCT SMYSHHB

    (c) Expand (6 + x)(6 x)

    Answer (c): [2] (d) Solve for x 3x 7 = 15

    Answer (d): x = [2]

    6. (a) State the formula for finding the area of trapezium.

    Answer (a): Area of trapezium = [1]

    (b) Hence, find the area of the trapezium IJKL.

    Answer (b): cm2 [2]

    7. Express

    (a) 1.0673 to 2 decimal places Answer (a): [1]

    (b) 54 139 to 3 significant figures

    Answer (b): [1]

    5 cm

    10 cm

    6 cm

    I J

    K L

  • MOCK 2 EXAMINATION MATHEMATICS 1

    5

    212/1/PNCT SMYSHHB

    8. (a) Given that a = 2, b = 3 and c = -1, calculate the value of abc + 4c2

    Answer (a): [2] (b) Make z the subject of formula

    xzy

    2

    5

    Answer (b): [2]

    9. (a) Express 25

    3as a percentage.

    Answer (a): % [1]

    (b) Calculate 30% of $270

    Answer (b): $ [1]

    (c) Shade 7

    3of the smiley face.

    [1]

  • MOCK 2 EXAMINATION MATHEMATICS 1

    6

    212/1/PNCT SMYSHHB

    10. In the space provided below, construct triangle PQR such that PQ = 6 cm, QR = 3 cm and PR = 5 cm.

    [3]

    (a) From the construction above, measure PQR

    Answer (a): [1]

    (b) Bisect the angle QRP [1]

    11. (a) Calculate the value of

    4

    1

    4

    3

    4

    3

    4

    3

    Answer (a): [2] (b) Estimate 34.5 8.5

    Answer (b): [1] (c) Express as a ratio in its simplest form: 1 h 25 min to 55 min.

    Answer (c): : [2]

  • MOCK 2 EXAMINATION MATHEMATICS 1

    7

    212/1/PNCT SMYSHHB

    12. Plot the points A (-3, -1), B (6, 2), C (7, 5), D (-2, 2) on the graph provided below and join the dots to form a shape.

    (a) What is the special name for the shape?

    Answer (a): [1] (b) Find the gradient of the line

    (i) AB

    Answer (b)(i): [1]

    (ii) BC

    Answer (b)(ii): [1] (c) Hence, form the equation of the line

    (i) AB

    Answer (c)(i): [2]

    (ii) BC

    Answer (c)(ii): [2]

    y

  • MOCK 2 EXAMINATION MATHEMATICS 1

    8

    212/1/PNCT SMYSHHB

    13. In the diagram below, AOB and COD are straight lines intersecting at a point O.

    (a) Find the value of:

    (i) x

    Answer (a)(i): [2]

    (ii) y

    Answer (a)(ii): [2]

    14. The figure below shows a right-angled triangle DEF. (a) Find the length of DE

    Answer (a): cm [2] (b) Find the ratio of

    (i) sin

    Answer (b)(i): [1]

    A B

    C

    D E

    O 42

    x

    y 24

    D

    E F

    4 cm

    5 cm

  • MOCK 2 EXAMINATION MATHEMATICS 1

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    212/1/PNCT SMYSHHB

    (ii) cos

    Answer (b)(ii): [1]

    (iii) tan

    Answer (b)(iii): [1]

    15. The figure below shows two identical squares overlapping at the corners. The area of the corners

    being overlapped, IFCJ is 100 cm2; length of EI, IF, AI, IC, CJ, FJ and JD are the same. Find the area of the whole figure.

    Answer: cm2 [2]

    ------------------------------------------------------------------------------------------------------------------------------------

    END OF PAPER

    TOTAL MARKS

    100 cm2

    A B

    C D

    E F

    G H

    I

    J