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WAEC mathematics questions and answers 2022 (OBJECTIVE)

INSTRUCTION: Answer all the question. Mathematics tables may be used in any question. The use of non-programmable, silent and cordless calculator is allowed. Think carefully before you shade the answer spaces; erase completely and answer you wish to change. Do all rough work on this question paper.

1. Evaluate, correct to four significant figures, (573.06 x 184.25).

  • A. 105600.00
  • B. 105622.00
  • C. 105500.00
  • D. 105532.00

2. Change 432five to a number in base three.

  • A. 10100three
  • B. 11100three
  • C. 11101three
  • D. 10110three

3. Given that A and B are sets such that n(A) = 8, n(B) = 12 and n(A ∩ B) = 3, find n(A ∪ B).

  • A. 15
  • B. 17
  • C. 20
  • D. 23

4. If √24 + √96 – √600 = y√6, find the value of y.

  • A. 4
  • B. 2
  • C. -2
  • D. -4

5. Evaluate 23 x 54 (mod 7).

A. 2

B. 3

C. 5

D. 6

6. If 43x = 16x + 1. find the value of x.

  • A. -2
  • B. 2
  • C. 1
  • D. – 1

7. A weaver bought a bundle of grass for $ 50.00 from which he made 8 mats. If each mat was sold for $ 15.00, find the percentage profit.

  • A. 240%
  • B. 140%
  • C. 120%
  • D. 40%

8. Find the 17th term of the Arithmetic Progression (A.P): -6, -1, 4, … .

  • A. -91
  • B. -86
  • C. 74
  • D. 79

9. M varies directly as n and inversely as the square of p. If M = 3 when n = 2 and p = 1, find M in terms of n and p.

  • A. M = 3n/2p2
  • B. M = 2n/3p2
  • C. M = 2n/3p
  • D. M = 3n2/2p2

10. If a = 3 and b = -7, find the value of 5b + (a+b)2/(a – b)2

  • A. 0.51
  • B. 0.19
  • C. -0.19
  • D. -0.51

11. Three boys shared D 10,500.00 in the ratio 6 : 7 : 8. Find the largest share.

  • A. D 4,000.00
  • B. D 5,000.00
  • C. D 4,500.00
  • D. D 3,500.00

12. The length of a piece of stick is 1.75 m. A boy measured it as 1.80m. Find the percentage error.

  • A. 4 4/7 %
  • B. 2 6/7 %
  • C. 2 7/9 %
  • D. 4 7/9 %

13. If 5x + 3y = 4 and 5x = 3y = 2, what is the value of (25×2 – 9y2?

  • A. 20
  • B. 16
  • C. 2
  • D. 8

14. Mary has $ 3.00 more than Ben but $ 5.00 less than Jane. If Mary has $ x, how much does Jane and Ben have altogether?

  • A. $ (2x – 8)
  • B. $ (2x + 8)
  • C. $ (2x – 2)
  • D. $ (2x + 2)

15. Consider the statements: p: Stephen is intelligent, q: Stephen is good at Mathematics. If p ⇒ q, which of the following is a valid conclusion?

  • A. If Stephen is good at Mathematics, then he is intelligent
  • B. If Stephen is not good at Mathematics, then he is not intelligent
  • C. If Stephen is not intelligent, then he is not good at Mathematics.
  • D. If Stephen is not good at Mathematics, then he is intelligent

16. What value of p will make (x2 – 4x + p) a perfect square?

  • A. -2
  • B. 16
  • C. 4
  • D. -8

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