Indices, Logarithms and Surds - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 2017

Simplify 4\(\sqrt{27}\) + 5\(\sqrt{12}\) − 3\(\sqrt{75}\)

A. 7
B. - 7
C. - 7\(\sqrt{3}\)
D. 7\(\sqrt{3}\)

Question 17:

• JAMB 2017

Simplify 3 \(^{n − 1}\) x \(\frac{27^{n + 1}}{81^n}\)

A. 3\(^{2n}\)
B. 9
C. 3ⁿ
D. 3 \(^{n + 1}\)

Question 18:

• JAMB 2019

If \(25^{1 - x} \times 5^{x + 2} \div (\frac{1}{125})^{x} = 625^{-1}\), find the value of x.

A. X = -4
B. X = 2
C. X = -2
D. X = 4

Question 19:

• JAMB 2018

Simplify
\(\frac {25^{\frac{2}{3}} \div 25^{\frac{1}{6}}} {(\frac{1}{5})^{\frac{7}{6}} \div (\frac{1}{5})^{\frac{1}{6}}}\)

A. 25
B. \(\frac{1}{5}\)
C. 1
D. \(\frac{1}{25}\)

Question 20:

• JAMB 2018

Evaluate (2√3 - 4) (2√3 + 4)

A. -4
B. -2
C. 2
D. 4