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Saturday, 13 June 2026
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Mathematics Past Questions and Answers

Topic: Indices, Logarithms and Surds

Jamb Mathematics Questions - Indices, Logarithms and Surds

Question 41:
y varies partly as the square of x and partly as the inverse of the square root of x.Write down the expression for y if y = 2 when x = 1 and y = 6 when x = 4
  • A Y = \(\frac{10x^2}{31} + \frac{52}{31\sqrt{x}}\)
  • B Y = x<sup style='font-size: smaller;'>2</sup> + \(\frac{1}{\sqrt{x}}\)
  • C Y = x<sup style='font-size: smaller;'>2</sup> + \(\frac{1}{x}\)
  • D Y = \(\frac{x^2}{31} + \frac{1}{31\sqrt{x}}\)
View Answer & Explanation
Question 42:
PQRS is a desk of dimensions 2m x 0.8 which is inclined at 30o to the horizontal. Find the inclination of the diagonal PR to the horizontal
  • A 30<sup style='font-size: smaller;'>o</sup> 35'
  • B 30<sup style='font-size: smaller;'>o</sup> 32'
  • C 15<sup style='font-size: smaller;'>o</sup> 36'
  • D 10<sup style='font-size: smaller;'>o</sup>
  • E 10<sup style='font-size: smaller;'>o</sup> 42'
View Answer & Explanation
Question 43:
Find, without using logarithm tables, the value of \(\frac{log_3 27 - log_{\frac{1}{4}} 64}{log_3 \frac{1}{81}}\)
  • A \(\frac{-3}{9}\)
  • B \(\frac{-3}{2}\)
  • C \(\frac{6}{11}\)
  • D \(\frac{43}{78}\)
View Answer & Explanation
Question 44:
Rationalize \(\frac{5\sqrt{7} - 7\sqrt{5}}{\sqrt{7} - \sqrt{5}}\)
  • A -2 \sqrt{35}\)
  • B 4\sqrt{7}\) - 6\(\sqrt{5}\)
  • C -\(\sqrt{35}\)
  • D 4\sqrt{7}\) - 8\(\sqrt{5}\)
  • E \(\sqrt{35}\)
View Answer & Explanation
Question 45:
The ages of Tosan and Isa differ by 6 and the product of their ages is 187. Write their ages in the form (x, y), where x > y.
  • A (12, 6)
  • B (23, 17)
  • C (17, 11)
  • D (18, 12)
View Answer & Explanation