Verified 2023 JAMB Mathematics Questions and Answers. Here is Joint Admissions and Matriculation Board released maths expo answers for 25th April, 2023. I will be showing the JAMB CBT mathematics answers and all you need to excel in the examination.

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JAMB is an entrance examination written by students who wish to get admission into tertiary-level institutions. Candidates are required to chose 4 subject including English language.

In this article, we will be showing this year mathematics expo as well as JAMB mathematics past questions and answers pdf for free.

We understand that the 2023 mathematics question and answer will not be the same for all candidate. You have nothing to worry. The expo will cover for different sections or time difference. All you need do is to keep refreshing this page.

### 2023 JAMB Mathematics CBT Questions and Answers (Expo)

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### JAMB Past Mathematics Answers

1. The sum of two numbers is twice their difference. If the difference of the numbers is P, find the larger of the two numbers

A. p/2

B. 3p/2

C. 5p/2

D. 3p

ANSWER: B (3p/2)

2. A binary operation * is defined by a*b = ab+a+b for any real number a and b. if the identity element is zero, find the inverse of 2 under this operation.

A. 2/3

B. 1/2

C. -1/2

D. -2/3

ANSWER: D ( -2/3) 3.

A cone has a base radius of 4 cm and a height of 3 cm. The area of its curved surface is

A. 12 pi cm^2

B. 20 pi cm^2

C. 24 pi cm^2

D. 251 pi cm^2

ANSWER: B (20 pi cm^2)

4. Find the rate of change of the total surface area S of a sphere with respect to its radius r when r = 2

A. 8 B. 16 C. 10 D. 14

5. Differentiate (cosӨ + sinӨ)2 with respect to Ө.

A. 2cos2Ө B. 2sin2Ө C. -2cos2Ө D. -2sin2Ө

6. A binary operation * on the set of rational numbers is defined as x * y = 2x + [x3 – y3/x + y]. find -1*2

A. 11 B. -11 C. 8 D. -8

7. A polynomial in x whose zeroes are 2, 1 and -3 is ______

A. x3 – 7x + 6

B. x3 + 7x – 6

C. x3 – 7x – 6

D. x3 + 7x + 6

8. Find the range of values of x for which 7x – 3 > 3x + 4

A. x < 7/4

B. x > 7/4

C. 7x < 4

D. -4x < 7

9. Some red balls were put in a basket containing 12 white balls and 16 blue balls. If the probability of picking a red ball from the basket is 3/7, how many red balls were introduced?

A. 13 B.20 C. 12 D. 21

10. Convert 12314 to a number in base 6.

A. 1056

B. 3016

C. 1036

D. 5016

11. Find the slope of the curve y = 3×3 + 5×2 – 3 at (-1, 5).

A. 1 B. -1 C. 19 D. -19

12. Find the area of the region bounded by y = x2 + x – 2 and x-axis.

A. 9/2 B. -39/6 C. 8/3 D. 16/3

13. The minimum value of y = x2 – 4x – 5 is ______

A. 2 B. -2 C.13 D. -13

14. There are 8 boys and 4 girls in a lift. What is the probability that the first person who steps out of the lift will be a boy?

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

15. H varies directly as p and inversely as the square of y. If H = 1, p = 8 and y = 2, find H in terms of p and y.

A. H = p /4y^2 B. H = 2p / y^2 C. H = p / 2 y^2 D. H = p / y^2

16. Solve 4x^2 – 16x + 15

A. X = 1 (1/2) or X = -2 (1/2) B. X = 1 (1/2) or X = 2 (1/2) C. X = 1 (1/2) or X = -1 (1/2) D. X = -1 (1/2) or X = -2 (1/2)

17. If (0.25)^y = 32, find the value of y.

A. y = -5/2 B. y = -3/2 B. y = 3/2 D. y = 5/2.

18. Simplify: log 6 – 3log 3 + 2/3log 27.

A. 3log 2 B. Log 2 C. Log 3 D. 2log 3

19. Bala sold an article for 6,900.00 nairas and made a profit of 15 percent. Calculate his percentage profit if he had sold for 6600.00.

A. 5 percent B. 10 percent C. 12 percent D. 13 percent

20. If 3P = 4Q and 9P = 8Q-12, find the value of PQ.

A. 12 B. 7 C. -7 D. -12

21. Evaluate 0.42 divided by 2.5 /0.5 x 2.05, leaving the answer in standard form.

A. 1.639 x 10^2 B. 1.639 x 10^1 C. 1.639 x 10^-1 D. 1.639 x 10^-2.

22. A husband contributes 7% of his income into a fund and his wife contributes 4% of her income. If the husband earns N5,500 per annum (p.a) and his wife earns N4,000 p.a, find the sum of their contribution

to the fund.

A. N1,045 B. N605 C. N545 D. N490.

23. If the children share N10.50K among themselves in the ratio 6:7:8, How much is the largest share?

A. N3.00 B. N3.50 C. N4.00 D. N4.50.

24. A trader makes a loss of 15% when selling an article. Find the ratio, selling price: cost price.

A. 3:20 B. 3:17 C. 17:20 D. 20:23.

25. The ages of three men are in the ratio 3:4:5. If the difference between the ages of the oldest and youngest is 18 years, find the sum of the ages of the three men.

A. 45 years B. 72 years C. 108 years D. 216 years.

JAMB mathematics is not a difficult task. All you need is to prepare well for the exam. Most of the questions are usually repeated from past questions.

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