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Tuesday, 21 April 2026
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Mathematics Past Questions and Answers

Jamb 1990 Mathematics Questions

Question 11:
Simplify 3 log69 + log612 + log664 - log672
  • A 5
  • B 7776
  • C Log<sub style='font-size: smaller;'>6</sub>31
  • D (7776)<sub style='font-size: smaller;'>6</sub>
View Answer & Explanation
Question 12:
Simplify (\(\frac{1}{x^{-1}} + \frac{1}{y^{-1}}\))-1
  • A \(\frac{x}{y}\)
  • B Xy
  • C \(\frac{x}{y}\)
  • D (xy)<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 13:
If a = 2, b = -2 and c = -\(\frac{1}{2}\), evaluate (ab2 - bc2)(a2c - abc)
  • A 2
  • B -28
  • C -30
  • D -34
View Answer & Explanation
Question 14:
If f(x - 4) = x2 + 2x + 3, Find, f(2)
  • A 6
  • B 11
  • C 27
  • D 51
View Answer & Explanation
Question 15:
Factorize 9(x + y)2 - 4(x - y)2
  • A (x + y)(5x + y)
  • B (x + y)<sup style='font-size: smaller;'>2</sup>
  • C (x + 5y)(5x + y)
  • D 5(x + y)<sup style='font-size: smaller;'>2</sup>
View Answer & Explanation