Jamb Mathematics 1987 Past Questions and Answers

Question 11:

• JAMB 1987

Four boys and ten girls can cut a field in 5 hours if the boys work at \(\frac{5}{4}\) the rate at which the girls work. How many boys will be needed to cut the field in 3 hours?

A. 180
B. 60
C. 25
D. 20

Question 12:

• JAMB 1987

Evaluate without using tables (0.008) -\(\frac{1}{3}\) x (0.16) - \(\frac{3}{2}\)

A. \(\frac{625}{8}\)
B. \(\frac{8}{625}\)
C. \(\frac{1}{8}\)
D. 8

Question 13:

• JAMB 1987

Simplify without using tables \(\frac{log_26}{log_28}\) - \(\frac{log_23}{log_2\frac{1}{2}}\)

A. \(\frac{1}{5}\)
B. \(\frac{1}{2}\)
C. \(\frac{-1}{2}\)
D. \(\frac{log_23}{log_27}\)

Question 14:

• JAMB 1987

Simplify without using tables \(\frac{2\sqrt{14} \times 3\sqrt{21}}{7\sqrt{24} \times 2\sqrt{98}}\)

A. \(\frac{3\sqrt{14}}{4}\)
B. \(\frac{3\sqrt{2}}{4}\)
C. \(\frac{3\sqrt{14}}{28}\)
D. \(\frac{3\sqrt{2}}{28}\)

Question 15:

• JAMB 1987

If P = \(\frac{2}{3}\) (\(\frac{1 - r^2}{n^2}\)), find n when r = \(\frac{1}{3}\) and p = 1

A. \(\frac{3}{2}\)
B. \(\frac{1}{3}\)
C. 3
D. \(\frac{2}{3}\)