NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 2019

Evaluate \((\frac{6}{0.32} \div \frac{2}{0.084})^{-1}\) correct to 1 decimal place.

A. 1.3
B. 2.5
C. 4.6
D. 3.2

Question 17:

• JAMB 2019

If 2\(^{x + y}\) = 16 and 4\(^{x - y} = \frac{1}{32}\), find the values of x and y.

A. X = \(\frac{3}{4}\), y = \(\frac{11}{4}\)
B. X = \(\frac{3}{4}\), y = \(\frac{13}{4}\)
C. X = \(\frac{2}{3}\), y = \(\frac{4}{5}\)
D. X = \(\frac{2}{3}\), y = \(\frac{13}{4}\)

Question 18:

• JAMB 2019

Simplify \(\frac{0.0839 \times 6.381}{5.44}\) to 2 significant figures.

A. 0.2809
B. 2.51
C. 3.5
D. 0.098

Question 19:

• JAMB 2019

If \(P = (\frac{Q(R - T)}{15})^{\frac{1}{3}}\), make T the subject of the formula.

A. \(T = \frac{15R - Q}{P^3}\)
B. \(T = R - \frac{15P^3}{Q}\)
C. \(T = \frac{R - 15P^3}{Q}\)
D. \(T = \frac{R + P^3}{15Q}\)

Question 20:

• JAMB 2019

A man bought a car newly for #1,250,000. He had a crash with the car and later sold it at the rate of #1,085,000. What is the percentage gain or loss of the man?

A. 43.7% loss
B. 13.2% gain
C. 13.2% loss
D. 43.7% gain