WAEC 2010 Mathematics Questions and Answer

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1. Simplify 0.000215 x 0.000028 and express your answer in standard form

  • 6.03×10⁹
  • 6x02x10⁹
  • 6.03×10¯⁹
  • 6.02×10¯⁹

2. Factorise: x+y-ax-ay

  • (x-y)(1-a)
  • (x+y)(1+a)
  • (x+y)(1-a)
  • (x-y)(1+a)

3. In the diagram <PSR=22°,<SPQ=58° and <PQR=41°. Calculate the obtuse angle QRS

  • 99°
  • 100°
  • 121°
  • 165°

4. The bar chart shows the marks distribution in an English test. Use it to answer question 4 and 5. If 50% is the pass mark,how many students passed the test?

  • 100
  • 85
  • 80
  • 70

5. What percentage of the students had marks ranging from 35 to 50?

  • 55 1/3%
  • 60%
  • 65%
  • 66 2/3%

6. A car uses one litre of petrol or every 14km. If one litre of petrol costs #63.00,how far can the car go with #900.00 worth of petrol?

  • 420km
  • 405km
  • 210km
  • 200km

7. Correct 0.002473 to 3 significant figures

  • 0.002
  • 0.0024
  • 0.00247
  • 0.0025

8. Simplify 1½+2⅓x¾-½

  • -2⅓
  • -2¼
  • 2⅛

9. The sum of 2 consecutive whole numbers is 5/6 of their product. Find the numbers

  • 3,4
  • 1,2
  • 2,3
  • 0,1

10. What is the value of m in the diagram?

  • 20°
  • 30°
  • 40°
  • 50°

11. In the diagram,QR//ST,/PQ/=/PR/ and <PST=75°,find the value of y

  • 105°
  • 110°
  • 130°
  • 150°

12. A casting is made up of copper and zinc. If 65% of the casting is zinc and their are 147g of copper,what is the mass of the casting?

  • 320g
  • 420g
  • 520g
  • 620g

13. Given that P={x:≤x≤6} and Q={x:2<2x<10},where x is is an intege. Find the n(PnQ)

  • 4
  • 6
  • 8
  • 10

14. The sum of 6 and one third of x is one more than twice x.Find the x

  • x=7
  • x=5
  • x=3
  • x=2

15. Given that T = {x:-2

  • 9
  • 10
  • 11
  • 12

16. Solve the inequality: 3(x+1)≤5(x+2)+15

  • x≥-14
  • x≤-14
  • x≤-11
  • x≥-11

17. An empty rectangular tank is 250cm long and 120 cm wide. If 80 litres of water is poured into the tank,calculate the height of the water

  • 6.0cm
  • 5.5cm
  • 5.0cm
  • 4.5cm

18. Given that

  • n=1
  • n=2
  • n=3
  • n=5

19. The table shows the number of pets kept by30 students in a class,if a student is picked at random from the class,what is the probability that he/she kept more than one part pet?

  • 1/5
  • 2/5
  • 3/5
  • 4/5

20. Simplify 2√3-6/√3+3/√7

  • 1
  • ⅓√3
  • 2√3
  • 6√3-17

21. In the diagram,triangles HKL and HIJ are similar. Which of the following ratios is equal to LH/JH?

  • KL/JI
  • HK/JK
  • JI/KL
  • HK/LK

22. In the diagram,the targent MN makes an angle of 55° with the chord PS.If 0 is the centre of the circle,find <RPS

  • 55°
  • 45°
  • 35°
  • 25°

23. Simplify 2/2+x +2/2-x

  • 4/4-x²
  • 8/4-x²
  • 4x/4-x²
  • 8-4x/4-x²

24. A rectangle has length xcm and width (x-1)cm. If the perimeter is 16cm,find the value x

  • 3½cm
  • 4cm
  • 4½cm
  • 5cm

25. Given that tan x=1, where 0°≤x≤90°,evaluate 1-sin²x/cosx

  • 2√2
  • √2
  • √2/2
  • ½

26. If sin 3y=cos2y and 0°≤y≤90°, find the values of y

  • 18°
  • 36°
  • 54°
  • 90°

27. The sum of the exterior angles of an n-sided convex polygon is half the sum of its interior angles. Find n

  • 6
  • 8
  • 9
  • 12

28. What is the length of a rectangle garden whose perimeter is 32cm and area 39cm²?

  • 25cm
  • 18cm
  • 13cm
  • 9cm

29. If y=2(√x²+m)/3N,make x the subject of the formula

  • √9y²N²-2m/2
  • √9y²N²+2m/2
  • √9y²N²-4m/2
  • √9y²N²+4m/2

30. The nth term of the sequence: -2,4,-8,16….is given by

  • Tn=2ᵔ
  • Tn=(2)ᵔ
  • Tn=(-2n)
  • Tn=n²

31. In the diagram,o is the centre of the circle.<SQR=60°, <SPR=y and <SOR=3x. Find the value of (x+y)

  • 110°
  • 100°
  • 80°
  • 70°

32. How many times,correct to the nearest whole number,will a man run round a circular track of diameter 100m to cover a distance of 1000m?

  • 3
  • 4
  • 5
  • 6

33. The shaded portion in the diagram is the solution of

  • x+y≤3
  • x+y<3
  • x+y>3
  • x+y≥3

34. In the diagram,/EF/=8cm,/FG/xcm,/GH/=(x+2)cm,<EFG=90cm°.If the area of the shaded portion is 40cm², find the area of ▲EFG

  • 72cm²
  • 64cm²
  • 32cm²
  • 128cm²

35. In the diagram,GI is a tangent to the circle at H. If EF//GI,calculate the size of <EHF.

  • 126°
  • 72°
  • 54°
  • 28°

36. Bala sold an article for #6900.00 and made a profit of 15%. If he sold it for #6600.00 he would make a:

  • Profit of 13%
  • Loss of 12%
  • Profit of 10%
  • Loss of 5%

37. In the diagram,<ROS= 66° and <POQ=3x. Some construction lines are shown. Calculate the value of x.

  • 10°
  • 11°
  • 22°
  • 30°

38. The mean age of R men in a club is 50 years. Two men, aged 55 and 63,left the club and the mean age reduced by 1 year. Find the value of R

  • 18
  • 20
  • 22
  • 28

39. The table is for the relation y=mx+c where m and c are constants. Use it to answer questions 39 and 40. What is the equation of the line described in the table?

  • y=2x
  • y=x+1
  • y=x
  • y=½x+1

40. What is the value of x when y=5

  • 8
  • 9
  • 10
  • 11

41. The diagram is a net of a right rectangular pyramid. Calculate the total surface area.

  • 208cm²
  • 112cm²
  • 92cm²
  • 76cm²

42. The diagram shows a rectangular cardboard from which a semi circle is cut off. Calculate the area of the remaining part

  • 44cm²
  • 99cm²
  • 154cm²
  • 165cm²

43. The subtraction below is in base seven. Find the missing number

  • 2
  • 3
  • 4
  • 5

44. In the diagram,o is the centre of the circle . Find the value x

  • 34
  • 29
  • 17
  • 14

45. If the sum of the roots of the equation (x-p)(2x+1)=0 is 1, find the value of p

  • ½
  • -1½

46. In the diagram <WOX=60°,<YOE=50°,<OXY=30°, what is the bearing of x from y?

  • 300°
  • 240°
  • 190°
  • 150°

47. In an athletics competition, the probability that an athlete wins a 100m race is ⅛ and the probability that he wins high jump is ¼. What is the probability that he wins only ine of the events?

  • 3/32
  • 3/16
  • 7/32
  • 5/16

48. If x²+kx+16/9 is a perfect square ,find the value of x.

  • 8/3
  • 7/3
  • 5/3
  • 2/3

49. י

  • 7/18x
  • 11/20x
  • 4/15x
  • 5/18x

50. The mean of the numbers 2,5,2x and 7 is less than or equal to 5. Find the range of values of x

  • x≤3
  • x≥3
  • x<3
  • x>3

ANSWERS

  1. B
  2. C
  3. C
  4. B
  5. D
  6. D
  7. C
  8. D
  9. C
  10. B
  11. A
  12. B
  13. A
  14. C
  15. C
  16. D
  17. A
  18. C
  19. C
  20. B
  21. A
  22. C
  23. B
  24. C
  25. C
  26. A
  27. C
  28. C
  29. B
  30. C
  31. A
  32. C
  33. C
  34. B
  35. C
  36. A
  37. B
  38. B
  39. A
  40. B
  41. B
  42. A
  43. D
  44. A
  45. A
  46. D
  47. A
  48. D
  49. A