NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 111:

• JAMB 2015

Find x if 132_x = 70 _eight.

A. 5
B. 3
C. 6
D. 1

Question 112:

• JAMB 2015

A man sells his new brand car for N420,000 at a gain of 15%. What did it cost him?

A. N410,000
B. N365, 217
C. N157, 250
D. N257,000

Question 113:

• JAMB 2015

Find the value of x if \( [ 1 ÷ 64^{(x + 2)}]= [4^{(x − 3)} ÷ 16^x ] \)

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

Question 114:

• JAMB 2015

A pipe made of metal 10cm thick has an external radius of 11cm. find the area of metal in making 2.4cm of pipe

A. 24πcm²
B. 21πcm²
C. 15πcm²
D. 17πcm²

Question 115:

• JAMB 2015

Simplify 4 √[(390695T− 8)½)]

A. 1/T
B. 2T
C. 5/T
D. T/5