NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 26:

• JAMB 2019

Find the value of k in the equation: \(\sqrt{28} + \sqrt{112} - \sqrt{k} = \sqrt{175}\)

A. \(\sqrt{28}\)
B. 7
C. 28
D. \(\sqrt{7}\)

Question 27:

• JAMB 2019

Evaluate \(\frac{2\log_{3} 9 \times \log_{3} 81^{-2}}{\log_{5} 625}\)

A. 4
B. -32
C. -8
D. 16

Question 28:

• JAMB 2019

Evaluate \(\frac{2\sin 30 + 5\tan 60}{\sin 60}\), leaving your answer in surd form.

A. \(\frac{2\sqrt{3}}{3} + 10\)
B. \(\frac{3\sqrt{2} - 1}{5}\)
C. \(\frac{3\sqrt{2} + 1}{5}\)
D. \(\frac{2\sqrt{3}}{3} - 10\)

Question 29:

• JAMB 2018

Add 54 \(_{eight}\) and 67\(_{eight}\) giving your answers in base eight

A. 111
B. 121
C. 123
D. 143

Question 30:

• JAMB 2018

Approximate 0.9875 to 1 decimal place.

A. 1.1
B. 1.0
C. 0.9
D. 0.10