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WAEC WASSCE Mathematics 2021 past questions and answers

This 2021 WAEC WASSCE Mathematics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2021 set with instant marking.

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Sample WAEC WASSCE Mathematics 2021 questions

1. If 3x - 5 = 16, what is the value of x?
  1. 7
  2. 5
  3. 9
  4. 11

Answer: A. 7

Adding 5 and dividing by 3 gives x = 7.

2. If 2x + y = 11 and x - y = 1, what is the value of x?
  1. 3
  2. 5
  3. 4
  4. 6

Answer: C. 4

Adding the equations gives 3x = 12, so x = 4.

3. Which expression is the complete factorisation of x^2 - 7x + 12?
  1. (x - 2)(x - 6)
  2. (x - 3)(x - 4)
  3. (x + 3)(x + 4)
  4. (x - 1)(x - 12)

Answer: B. (x - 3)(x - 4)

The factors -3 and -4 have product 12 and sum -7.

4. The nth term of a sequence is 5n - 2; what is its 12th term?
  1. 52
  2. 55
  3. 56
  4. 58

Answer: D. 58

Substituting n = 12 gives 5(12) - 2 = 58.

5. y varies directly as the square of x, and y = 45 when x = 3; what is y when x = 2?
  1. 20
  2. 15
  3. 10
  4. 30

Answer: A. 20

Since y = kx^2, 45 = 9k gives k = 5 and hence y = 20.

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