TRINITY HILLS, OFADA, OGUN STATE
FIRST TERM CONTINUOUS ASSESSMENT TEST 2012/2013 SESSION
CLASS: BASIC 8 SUBJECT: MATHEMATICS TIME: 2 HOURS
SECTION A: MULTIPLE CHOICE
INSTRUCTIONS: Answer ALL questions. Each is followed by four options lettered A – D. Find out
the correct option for each question and shade in pencil on your answer sheet the answer space which
bears the same letter as the option you have chosen. Do not waste time on any question. If you find any
difficult, go to others and finish them before you come back to the difficult one(s).
Give only ONE answer to each question.
1. What is the place value of the 9 in 37.29 ?
(A) 9 10-4 (B) 9 10-3 (C) 9 10-2 (D) 9 10-1
2. The shortest distance between two points is …
(A) a curve joining the two points (B)a straight line joining the two points
(C) perpendicular bisector of the line (D) angular bisector of the angles formed
3. Write 650 millionths in digits only
(A) 0.000 65 (B) 0.006 5 (C) 0.065 (D) 0.65
4. How many vertices does a square-based pyramid have?
(A) 16 (B) 9 (C) 7 (D) 5
5. Find the median of this set of numbers: 8, 6, 3, 10, 6, 9
(A) 9 (B) 8 (C) 7 (D) 6
6. An examination that is meant to last
, would last for how many seconds?
(A) !0 000 seconds (B) 9 000 seconds (C) 7 200 seconds (D) 3 600 seconds
7. Find the perimeter of a square of sides 5cm.
(A) 25cm (B) 20cm (C) 10cm (D) 5cm
8. Simplify (
)
(A)
(B)
(C)
(D)
9. One half of a number is equal to 6. What is the number?
(A) 15 (B) 12 (C) 6 (D) 3
10. Find the least value by which 112 must be multiplied to give a perfect square.
(A) 14 (B) 7 (C) 5 (D) 2
11. Express in figure Twenty five thousand, five hundred and seventy three.
(A) 25 573 (B) 25 730 (C) 205 073 (D) 250 703 .
12. Which is the greatest of these negative integers?
(A) -70 000 (B) -7 000 (C) -700 (D) -70
13. Express 43,579 correct to the nearest thousand
(A) 44 000 (B) 43 000 (C) 43 600 (D) 43 500
14. Calculate the value of angle z in the diagram below.
1000 z
(A) 1000 (B) 900 (C) 400 (D) 150
15. Simplify -215 + (-9) - (-19)
(A) -70 (B) -50 (C) -40 (D) -25
16. What is the square root of 0.0081?
(A) 0.09 (B) 0.9 (C) 9.0 (D) 90
17. What is the range of the following set of scores in a music test 4, 1, 3, 0, 2?
(A) 0 (B) 2 (C) 4 (D) 5.
18. Simplify ( ) ( )
(A) +25 (B) +20 (C) -20 (D) -25
19. What is the circumference of a circle of radius 7cm? (Take ⁄ )
(A) 24cm (B) 44cm (C) 37cm (D) 77cm
20. Express 0.00754 in standard form.
(A) 7.54 x10-5 (B) 7.54 x 10-3 (C) 7.54x10-2 (D) 7.54 x10-1
21. Express 9395 to 2 significant figures.
(A) 9200 (B)9300 (C) 9400 (D) 9500
22. What is the sum of 12.41, 120 and 0.426
(A) 117.876 (B) 121.836 (C) 132.836 (D) 132.866
23. Simplify
(A) (B) (C) (D)
24. The marked price of a shirt is $140. If a discount of 25% is given for cash payment. What is the cash price?
(A) $35 (B) $105 (C) $115 (D) $165
25. Simplify 6.5 x 10-5 x 4.2 x 105 and give your answer in standard form.
(A) 2.73 x101 (B) 2.73x102 (C) 27.3 x101 (D) 27.3 x 10 2.
26. Simplify 37 x3-2 x3-1 divided by 30
(A) 243 (B) 81 (C) 27 (D) 12
27. Find the LCM of 10a2b and 30ab
(A) 30a2b (B) 10ab (C) 5a2b (D) 2a2b2
28. If 650 is the supplementary angle of x, find x.
(A) 250 (B) 450 (C) 1150 (D) 1350
29. What is of (-45q)
(A) +9q (B) -9q (C) -9 (D) +9
30. Convert 102ten to a number in base 2
(A) 11001102 (B) 10101002 (C) 100111002 (D) 11101102
31. Divide £960 between Dumebi and Gabriel so that for every £3 Dumebi gets Gabriel receives £5. What is Dumebi’s share?
(A) £600 (B) £576 (C) £360 (D) £300
32. In a group of 40 students, 25 are female. What percent of the group is male?
(A) 16.5% (B) 37.5% (C) 62.5% (D) 75.5%
33. 8.04 to the nearest tenth is …..
(A) 8.0 (B) 8.05 (C) 8,1 (D) 10.0
34. Which one of the following is the inverse operation of divide by -8?
(A) divide by -8 (B) multiply by -8 (C) Subtract +8 (D) Add -1/8
35. How much interest does £1,200 make in years at 30% per annum?
(A) £520 (B) £530 (C) £540 (D) £550.
36. What numbers does the Roman Numeral MCLXXII represent?
(A) 105 (B) 157 (C) 1172 (D) 11502
37. The average mass of six people is 58kg. if one of the people has a body mass of 43kg. What is the average mass of the other 5 people?
(A) 58kg (B) 61kg (C) 64kg (D) 68kg
38. Which of these quadrilateral has ONLY ONE line of symmetry
(A) kite (B) parallelogram (C) rectangle (D) trapezium.. .
39. The square root of a number is 4k.What is half of the number?
(A) 2k (B) 4k2 (C) 6k (D) 8k2
40. An article was bought for N160 and was sold for N200. What was the percentage profit?
(A) 75% (B) 40% (C) 25% (D) 20%
41. The scores of ten students in Basic 8 silver are 3, 1, 5, 6, 4, 7, 6, 7, 5, 6. What is the mode of the scores?
(A) 7 (B) 6 (C) 4 (D) 3
42. Add the square root of 4 to the square of 4, and divide the result by 2.
(A) 2 (B) 4 (C) 7 (D) 9
43. Simplify the expression:
(A) 36n (B) 18n (C) 12n (D) 10n
44. A cartoon of biscuit holds 90 packs of biscuit. How much would the tuck shop manager make if he sells each pack for N650?
(A) N68 500 (B) N58 500 (C) N56 500 (D) N55 800
45. Which of the following options give the correct factors of 36?
(A) 1, 3, 4, 6, 10, 18, 36 (B) 1, 2, 3, 4, 6, 9, 12, 18, 36
(C) 1, 2, 4, 6, 8, 12, 36 (D) 1, 5, 8, 9, 12, 18, 36
46. Find the square root of 20 ¼.
(A) (B) (C) (D)
47. Find the area of a square board of sides k m.
(A) 2k m2 (B) k2 m2 (C) k m2 (D) k/2 m2
48. The L.C.M. of 5ab2 and 3a2b is….
(A) 5a3b (B) 3a5b (C) 15ab (D) 15a2b2
49. Subtract -18 from the product of 4 and 10; then divide the result by -2
(A) 40 (B) 22 (C) -29 D) -8.
50. Change 10010two to base 10
( A) 25 (B) 18 (C) 10 (D) 6
51. If 0.0075 is written as 7.5 x 10n, the value of n is
( A) 5 (B) 3 (C) -3 (D) -5
52. Express 2.1km 201m 48cm in metres
(A) 2 301.48m (B) 230 148m (C) 2 120.148m (D) 2 120 148m
53. Each face of a cube is in the shape of a…….
(A) triangle (B) rectangle (C) square (D) circle
54. What is the sum of the first five prime numbers?
(A) 15 (B) 18 (C) 25 (D) 28
55. Find the area of a circle of radius 3m. ( =3.1)
(A) 27.9m2 (B) 27.2m2 (C) 28.2m2 (D) 28.3m2
56. Evaluate 11011 + 101, each number is in base two. Give your answer as binary number.
(A) 100 000 (B) 110 000 (C) 101 000 (D) 100 100
57. Find the H.C.F. of 144, 90 and 54.
(A) 6 (B) 9 (C) 18 (D) 36
58. Simplify ( )
(A) ( ) (B) ( ) (C) ( ) (D) ( ) 59. A number is divisible by 6 if…….
(A) the unit digit is 0 or 6 (B) the sum of the digits is divisible by 6
(C) the last digit is even and the sum of the digits is divisible by 3
(D) the last three digits formed a number divisible by 6
60. Simplify: 2a-1 X (3a)2
(A) 3a2 (B) 12a-1 (C) 18a (D) 6a-2
SECTION B: THEORY
INSTRUCTIONS: Answer ALL questions. In each question, all necessary details of working including rough/scratch work must be shown in the answer booklet and use appropriate units. Orderly presentation of work will be rewarded. Use pencil for diagrams, graphs and rough work.
Use of calculator is not allowed.
1a. Evaluate 110two (101two +1001two ─ 111two)
b. Simplify (4.8 1015) ÷ (0.12 105) Express your answer in standard form.
c. Simplify 4c3 x 7c2
2a. Remove brackets and simplify 8(a + b) − 7(2a − b)
b. Find the LCM of 3x2y and 2xy2.
3. The Earth is about 1.5. x 108 Km from the sun. The planet Saturn is about 1.43 x 109 km from the sun. Suppose the sun, the Earth and Saturn are in a straight line. What is the distance between Earth and Saturn;
a. When they are on directly opposite sides of the sun.
b. When they are on the same side of the sun.
Leave your answers in standard form.
4a. Find the smallest number by which 540 must be multiplied so that the product is a perfect square.
b. Go is a Japanese game played on a square board divided into smaller squares.
There are 5184 smaller squares. How many small squares are there along each side
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