Mathematics 2020 Past Questions | WAEC

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

31. In the diagram, PS¯/SR¯, PS¯/TR¯, QS¯/UR¯, PS¯= 15cm, SR¯= 8cm, PS¯ = 10cm and area of △ SUR = 24cm2. Calculate the area of PTRS.

  • A. 40 cm2
  • B. 48 cm2
  • C. 80 cm2

D. 120 cm2

32. In the diagram, PQR is a circle with centre O. If < OPQ = 48o, find the value of m

  • A. 96o
  • B. 90o
  • C. 68o
  • D. 42o

33. The pie chart shows the population of men, women, and children in a city. If the population of the city is 1,800,000, how many men are in the city?piechart

  • A. 845,000
  • B. 600,000
  • C. 355,000

D. 250,000

34. The mean of the numbers 15, 21, 17, 26, 18, and 29 is 21. Calculate the standard deviation 

  • A. 9
  • B. 6
  • C. 5
  • D. 0

35. In the diagram, O is the centre of the circle. SOQ is the diameter and < SRP = 37o. Find < PSQ.diagram

  • A. 127o
  • B. 65o
  • C. 53o
  • D. 37o

36. Find the sum of the interior angle of a pentagon.

  • A. 340o
  • B. 350o
  • C. 540o
  • D. 550o

37. The diameter of a sphere is 12 cm. Calculate, correct of the nearest cm3, the volume of the sphere, [Take π=22/7]


  • A.
     903 cm3
  • B. 904 cm3
  • C. 905 cm3
  • D. 906 cm3

38.  A box contains 12 identical balls of which 5 are red, 4 blue, and the rest are green.  If a ball is selected at random from the box, what is the probability that it is green? 

  • A. 3/4
  • B. 1/2
  • C. 1/3
  • D. 1/4

39. A box contains 12 identical balls of which 5 are red, 4 blue, and the rest are green. If two balls are selected at random one after the other with replacement, what is the probability that both are red? 

  • A. 25/144
  • B. 5/33
  • C. 5/6
  • D. 103/132

40. In the diagram PQ is a straight line. If m = 1/2(x + y + z), find value of m.

  • A. 45o
  • B. 60o
  • C. 90o
  • D. 100o

41. 

   x

6.20

6.85

7.50

   y

3.90

5.20

6.50

The points on a linear graph are as shown in the table. Find the gradient (slope) of the line. 

  • A. 2 1/2
  • B. 2
  • C. 1
  • D. 1/2

42. In the diagram, O is the centre of the circle, PQ¯and RS¯are tangents to the circle. Find the value of (m + n). 

  • A. 120o
  • B. 90o
  • C. 75o
  • D. 60o

43. Which of the following is not a sufficient condition for two triangles to be congruent?

  • A. AAS
  • B. SSS
  • C. SAS
  • D. SSA

44. A woman received a discount of 20% on a piece of cloth she purchased from a shop. If she paid $525.00, what was the original price?

  • A. $675.25
  • B. $660.25
  • C. $656.25
  • D. $616.25

45. The interquartile range of distribution is 7. If the 25th percentile is 16, find the upper quartile.

  • A. 35
  • B. 30
  • C. 23
  • D. 9
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