JAMB UTME 2022
JAMB Mathematics 2022 past questions
5 objective questions from the 2022 JAMB Mathematics paper. Answer each one, then reveal the answer and explanation.
Question 1
IndicesEvaluate $2^{2} \times 2^{1}$.
- Option A: 8
- Option B: 4
- Option C: 64
- Option D: 6
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Answer: A, 8
Add the indices: $2^{2} \times 2^{1} = 2^{3} = 8$.
Question 2
StatisticsFind the mean of 22, 24, 26, 16, 17.
- Option A: 22
- Option B: 20
- Option C: 21
- Option D: 105
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Answer: C, 21
The sum is 105 and there are 5 numbers, so the mean is 105 ÷ 5 = 21.
Question 3
Quadratic equationsSolve the equation $x^2 - 5x + 6 = 0$.
- Option A: x = -2 or x = -3
- Option B: x = 2 or x = 3
- Option C: x = -2 or x = 3
- Option D: x = 2 or x = -3
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Answer: B, x = 2 or x = 3
The equation factorises as $(x - 2)(x - 3) = 0$, so x = 2 or x = 3.
Question 4
Linear equationsSolve for $x$: $5x + 13 = 23$.
- Option A: x = 3
- Option B: x = 1
- Option C: x = 7.2
- Option D: x = 2
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Answer: D, x = 2
Subtract 13 from both sides to get 5x = 10, then divide by 5: x = 2.
Question 5
MensurationFind the volume of a cylinder of radius 42 cm and height 10 cm. (Take $\pi = \frac{22}{7}$.)
- Option A: 5,544 cm³
- Option B: 110,880 cm³
- Option C: 2,640 cm³
- Option D: 55,440 cm³
Show the answerHide the answer to question 5
Answer: D, 55,440 cm³
Volume = $\pi r^2 h$ = 22/7 × 42² × 10 = 55,440 cm³.
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