NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 66:

• JAMB 2019

If the universal set μ = {x : 1 ≤ x ≤ 20} and
A = {y : multiple of 3}
B = |z : odd numbers}
Find A ∩ B

A. {1, 3, 6}
B. {3, 5, 9, 12}
C. {3, 9, 15}
D. {2, 3, 9}

Question 67:

• JAMB 2018

If y = 23\(_{five}\) + 101\(_{three}\) , find y, leaving your answer in base two

A. 1110
B. 10111
C. 11101
D. 111100

Question 68:

• JAMB 2018

Solve for t in the equation \(\frac{3}{4}\)t + \(\frac{1}{3}\)(21 - t) = 11

A. \(\frac{9}{13}\)
B. \(\frac{7}{13}\)
C. 5
D. 9\(\frac{3}{5}\)

Question 69:

• JAMB 2018

A school girl spends \(\frac{1}{4}\) of her pocket money on books and \(\frac{1}{3}\) on dress. What fraction remains?

A. \(\frac{5}{6}\)
B. \(\frac{7}{12}\)
C. \(\frac{5}{12}\)
D. \(\frac{1}{6}\)

Question 70:

• 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. \(\frac{1}{25}\)