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Friday, 14 August 2026
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Mathematics Past Questions and Answers

Topic: Variation

Jamb Mathematics Questions - Variation

Question 6:
Father reduced the quantity of food bought for the family by 10% when he found that the cost of living had increased 15%. Thus the fractional increase in the family food bill is now
  • A \(\frac{1}{12}\)
  • B \(\frac{6}{35}\)
  • C \(\frac{19}{300}\)
  • D \(\frac{7}{200}\)
  • E \(\frac{5}{100}\)
View Answer & Explanation
Question 7:
A canal has rectangular cross section of width10cm and breadth 1m. If water of uniform density 1 gm cm-3 flows through it at a constant speed of1000mm per minute, the adjacent sea is
  • A 100000
  • B 1000000
  • C 120000
  • D 30000
  • E 350000
View Answer & Explanation
Question 8:
After getting a rise of 15%, a man's new monthly salary is N345. How much per month did he earn before the increase?
  • A N330
  • B N396.75
  • C N300
  • D N293.25
  • E N360
View Answer & Explanation
Question 9:
The quantity y is partly constant and partly varies inversely as the square of x. With P and Q as constants, a possible relationship between x and y is
  • A Y = Q + \(\frac{P}{x^2}\)
  • B Y = Q + px
  • C Y = \(\frac{PQ}{x^2}\)
  • D Y = Q - \(\frac{P}{x^2}\)
View Answer & Explanation
Question 10:
Find the value of k if \(\frac{5 + 2r}{(r + 1)(r - 2)}\) expressed in partial fraction is \(\frac{k}{r - 2}\) + \(\frac{L}{r + 1}\) where K and L are constants
  • A 3
  • B 2
  • C 1
  • D -1
View Answer & Explanation