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Saturday, 18 April 2026
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Mathematics Past Questions and Answers

Jamb 2013 Mathematics Questions

Question 21:
If y = x sin x, find \(\frac{\delta y}{\delta x}\)
  • A Sin x - cos x
  • B Cos x - x sin x
  • C Cos x + x sin x
  • D Sin x + x cos x
View Answer & Explanation
Question 22:
If y = (2x + 2)\(^3\), find \(\frac{\delta y}{\delta x}\)
  • A 3(2x +2)<sup style='font-size: smaller;'>2</sup>
  • B 6(2x +2)
  • C 3(2x +2)
  • D 6(2x +2)<sup style='font-size: smaller;'>2</sup>
View Answer & Explanation
Question 23:
The radius of a circle is increasing at the rate of 0.02cms-1. Find the rate at which the area is increasing when the radius of the circle is 7cm.
  • A 0.75cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>
  • B 0.53cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>
  • C 0.35cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>
  • D 0.88cm<sup style='font-size: smaller;'>2</sup>S<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 24:
Find the mean of t + 2, 2t - 4, 3t + 2 and 2t.
  • A T + 1
  • B 2t
  • C 2t + 1
  • D T
View Answer & Explanation
Question 25:
The mean of seven numbers is 10. If six of the numbers are 2, 4, 8, 14, 16 and 18, find the mode.
  • A 6
  • B 8
  • C 14
  • D 2
View Answer & Explanation