Mathematics 2021 Past Questions | JAMB
Study the following Mathematics past questions and answers for JAMB, WAEC NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.
- Solve the following equation: \(\frac{2}{(2r – 1)}\) – \(\frac{5}{3}\) = \(\frac{1}{(r + 2)}\)
- A. ( 1,\(\frac{5}{2}\) )
- B. ( 1,-\(\frac{5}{2}\) )
- C. ( \(\frac{5}{2}\), 1 )
- D. (2,1)
2. In how many ways can 2 students be selected from a group of 5 students in a debating competition?
- A. 25 ways
- B. 10 ways
- C. 15 ways
- D. 20 ways
3. What is the rate of change of the volume V of a hemisphere with respect to its radius r when r = 2?
- A. 8π
- B. 16π
- C. 2π
- D. 4π
4. determine the maximum value of y=3x2+ 5x – 3
- A. 6
- B. 0
- C. 2
- D. 4
5. A trapezium has two parallel sides of length 5cm and 9cm. If the area is 91cm2, find the distance between the parallel sides
- A. 13 cm
- B. 4 cm
- C. 6 cm
- D. 7 cm
6. find the value of p if the line which passes through (-1, -p) and (-2p,2) is parallel to the line 2y+8x-17=0?
- A. −2/7
- B. 2/7
- C. −6/7
- D. 6/7
7. The ratio of the length of two similar rectangular blocks is 2 : 3. If the volume of the larger block is 351cm3, then the volume of the other block is?
- A. 234.00 cm3
- B. 526.50 cm3
- C. 166.00 cm3
- D. 687cm3
8. Find the derivatives of the function y = 2x2(2x – 1) at the point x = -1?
- A. 18
- B. 16
- C. -4
- D. -6
9. Correct 241.34(3 x 10-3)2to 4 significant figures
- A. 0.0014
- B. 0.001448
- C. 0.0022
- D. 0.002172
10. Find the mean deviation of 1, 2, 3 and 4
- A. 1.0
- B. 1.5
- C. 2.0
- D. 2.5
11. At what rate would a sum of N100.00 deposited for 5 years raise an interest of N7.50?
- A. %
- B. 2%
- C. 1.5%
- D. 25%
12. Three children shared a basket of mangoes in such a way that the first child took 1/4 of the mangoes and the second 3/4 of the remainder. What fraction of the mangoes did the third child take?
- A. 3/16
- B. 7/16
- C. 9/16
- D. 13/16
- A. 8.8 x 10-1
- B. 8.8 x 10-2
- C. 8.8 x 10-3
- D. 8.8 x 103
14. Simplify \(\sqrt{27}\) + \(\frac{3}{\sqrt{3}}\)
- A. 4\(\sqrt{3}\)
- B. \(\frac{4}{\sqrt{3}}\)
- C. 3\(\sqrt{3}\)
- D. \(\frac{\sqrt{3}}{4}\)
15. Three brothers in a business deal share the profit at the end of a contact. The first received 1/3 of the profit and the second 2/3 of the remainder. If the third received the remaining N12000.00 how much profit did they share?
- A. N60 000.00
- B. N54 000.00
- C. N48 000.00
- D. N42 000.00
