Indices - Jamb Mathematics Past Questions and Answers

Question 11:

• JAMB 2016

Evaluate \(\frac{27^\frac{1}{3} - 8^\frac{2}{3}}{16^\frac{2}{4} \times 2}\)

A. \(\frac{23}{5}\)
B. -\(\frac{23}{5}\)
C. \(\frac{1}{8}\)
D. \(\frac{21}{7}\)

Question 12:

• 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 13:

• JAMB 2015

Solve the equation
\( 5^{(x − 2)} = (1 ÷ 125)^{(x +3)}\)

A. 3/2
B. − 7/4
C. 4/7
D. 7/4

Question 14:

• JAMB 2013

Simplify \(\frac{3^{-5n}}{9^{1-n}} \times 27^{n + 1}\)

A. 3²
B. 3³
C. 3⁵
D. 3

Question 15:

• JAMB 1978

If (25)^{x - 1} = 64(\(\frac{5}{2}\))⁶, then x has the value

A. 7
B. 4
C. 32
D. 64
E. 5