Jamb Mathematics 2021 Past Questions and Answers

Question 36:

• JAMB 2021

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)

Question 37:

• JAMB 2021

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

Question 38:

• JAMB 2021

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

Question 39:

• JAMB 2021

Determine the maximum value of y=3x\(^2\) + 5x - 3

A. 6
B. O
C. 2
D. No correct option

Question 40:

• JAMB 2021

A trapezium has two parallel sides of length 5cm and 9cm. If the area is 91cm\(^2\), find the distance between the parallel sides

A. 13 cm
B. 4 cm
C. 6 cm
D. 7 cm