Jamb Mathematics 2021 Past Questions and Answers

Question 11:

• JAMB 2021

Musa borrows N10.00 at 2% per month simple interest and repays N8.00 after 4 months. How much does he still owe?

A. N10.80
B. N10.67
C. N2.80
D. N2.67

Question 12:

• JAMB 2021

Simplify 2log \(\frac{2}{5}\) - log\(\frac{72}{125}\) + log 9

A. 1 - 4 log3
B. -1 + 2 log 3
C. -1 + 5 log2
D. 1 - 2log 2

Question 13:

• JAMB 2021

A car travels from calabar to Enugu, a distance of P km with an average speed of U km per hour and continues to benin, a distance of Q km, with an average speed of Wkm per hour. Find its average speed from Calabar to Benin

A. \(\frac{(p + q)}{pw + qu}\)
B. \(\frac{uw(p + q)}{pw + qu}\)
C. \(\frac{uw(p + q)}{pw}\)
D. \(\frac{uw}{pw + qu}\)

Question 14:

• JAMB 2021

If w varies inversely as \(\frac{uv}{u + v}\) and w = 8 when

u = 2 and v = 6, find a relationship between u, v, w.

A. Uvw = 16(u + v)
B. 16uv = 3w(u + v)
C. Uvw = 12(u + v)
D. 12uvw = u + v

Question 15:

• JAMB 2021

If g(x) = x\(^2\) + 3x find g(x + 1) - g(x)

A. (x + 2)
B. 2(x + 2)
C. (2x + 1)
D. (x² + 4)