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Monday, 02 November 2026
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Mathematics Past Questions and Answers

Jamb 1981 Mathematics Questions

Question 21:
Solve \(\frac{1}{x + 1}\) - \(\frac{1}{x + 3}\) = \(\frac{1}{4}\)
  • A X = -1 or 3
  • B X = 1 or 3
  • C X = 1 or -5
  • D X = -1 or 5
  • E X = -1 or -3
View Answer & Explanation
Question 22:
In \(\bigtriangleup\)XYZ, XY = 3cm, XZ = 5cm and YZ = 7cm. If the bisector of XYZ meets XZ at W, what is the length of XW?
  • A 1.5cm
  • B 2.5cm
  • C 3cm
  • D 4cm
  • E None of the above
View Answer & Explanation
Question 23:
If \(\log_{2} y = 3 - \log_{2} x^{\frac{3}{2}}\), find y when x = 4.
  • A 8
  • B \(\sqrt{65}\)
  • C 4\(\sqrt{2}\)
  • D 3
  • E 1
View Answer & Explanation
Question 24:
Given that 10x = 0.2 and log102 = 0.3010, find x
  • A -1.3010
  • B -0.6990
  • C 0.6990
  • D 1.3010
  • E 0.02
View Answer & Explanation
Question 25:
Two cars X and Y start at the same point and travel towards a point P which is 150km away. If the average speed of Y is 60km per hour and x arrives at P 25 minutes earlier than Y. What is the average speed of X?
  • A 51\(\frac{3}{7}\)km per hour
  • B 72km per hour
  • C 37\(\frac{1}{2}\) km per hour
  • D 66km per hour
  • E 75km per hour
View Answer & Explanation