WAEC WASSCE 2022
WAEC Mathematics 2022 past questions
5 objective questions from the 2022 WAEC Mathematics paper. Answer each one, then reveal the answer and explanation.
Question 1
MensurationFind the area of a circle of radius 42 cm. (Take $\pi = \frac{22}{7}$.)
- Option A: 5,544 cm²
- Option B: 264 cm²
- Option C: 11,088 cm²
- Option D: 132 cm²
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Answer: A, 5,544 cm²
Area = $\pi r^2$ = 22/7 × 42 × 42 = 5,544 cm².
Question 2
StatisticsFind the mean of 51, 37, 40, 41, 46.
- Option A: 43
- Option B: 44
- Option C: 42
- Option D: 41
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Answer: A, 43
The sum is 215 and there are 5 numbers, so the mean is 215 ÷ 5 = 43.
Question 3
IndicesSimplify $\frac{x^{5} \times x^{3}}{x^{4}}$.
- Option A: $x^{4}$
- Option B: $x^{11}$
- Option C: $x^{12}$
- Option D: $x^{8}$
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Answer: A, $x^{4}$
Add the indices when multiplying and subtract when dividing: 5 + 3 − 4 = 4.
Question 4
Quadratic equationsSolve the equation $x^2 - 11x + 28 = 0$.
- Option A: x = -4 or x = -7
- Option B: x = 4 or x = 7
- Option C: x = -4 or x = 7
- Option D: x = 4 or x = -7
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Answer: B, x = 4 or x = 7
The equation factorises as $(x - 4)(x - 7) = 0$, so x = 4 or x = 7.
Question 5
Linear equationsSolve for $x$: $2x + 7 = 17$.
- Option A: x = 6
- Option B: x = 5
- Option C: x = 4
- Option D: x = 12
Show the answerHide the answer to question 5
Answer: B, x = 5
Subtract 7 from both sides to get 2x = 10, then divide by 2: x = 5.
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