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Monday, 15 June 2026
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Mathematics Past Questions and Answers

Topic: Number bases

Jamb Mathematics Questions - Number bases

Question 16:
If S = (4t + 3)(t - 2), find ds/dt when t = 5 secs.
  • A 50 units per sec
  • B 35 units per sec
  • C 22 units per sec
  • D 13 units per sec
View Answer & Explanation
Question 17:
If 2\(^{x + y}\) = 16 and 4\(^{x - y} = \frac{1}{32}\), find the values of x and y.
  • A X = \(\frac{3}{4}\), y = \(\frac{11}{4}\)
  • B X = \(\frac{3}{4}\), y = \(\frac{13}{4}\)
  • C X = \(\frac{2}{3}\), y = \(\frac{4}{5}\)
  • D X = \(\frac{2}{3}\), y = \(\frac{13}{4}\)
View Answer & Explanation
Question 18:
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
View Answer & Explanation
Question 19:
A factory worker earns #50,000 per month out of which he spends 15% on his children's education, #13,600 on Food, 3% on electricity and uses the rest for his personal purpose. How much does he have left?
  • A N21,850
  • B N18,780
  • C N27,400
  • D N32,500
View Answer & Explanation
Question 20:
Find the probability that a number selected at random from 21 to 34 is a multiple of 3
  • A \(\frac{3}{11}\)
  • B \(\frac{2}{9}\)
  • C \(\frac{5}{14}\)
  • D \(\frac{5}{13}\)
View Answer & Explanation