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Saturday, 15 August 2026
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Mathematics Past Questions and Answers

Topic: Ratio, proportion and rate

Jamb Mathematics Questions - Ratio, proportion and rate

Question 16:
If three numbers P, Q, R are in ratio 6 : 4 : 5, find the value of \(\frac{3p - q}{4q + r}\)
  • A \(\frac{3}{2}\)
  • B \(\frac{2}{3}\)
  • C 2
  • D 3
  • E 18
View Answer & Explanation
Question 17:
If x varies directly as y3 and x = 2 when y = 1, find x when y = 5
  • A 2
  • B 10
  • C 125
  • D 250
View Answer & Explanation
Question 18:
If P varies inversely as V and V varies directly as R2, find the relationship between P and R given that R = 7 when P = 2
  • A P = 98R<sup style='font-size: smaller;'>2</sup>
  • B PR<sup style='font-size: smaller;'>2</sup> = 98
  • C P = \(\frac{1}{98R^{2}}\)
  • D P = \(\frac{PR^{2}}{98}\)
View Answer & Explanation
Question 19:
Two sisters, Taiwo and Keyinde, own a store. The ratio of Taiwo's share to Kehinde's is 11:9. Later, Keyinde sells \(\frac{2}{3}\) of her share to Taiwo for N720.00. Find the value of the store.
  • A N1,080.00
  • B N2,400.00
  • C N3,000.00
  • D N3,600.00
View Answer & Explanation
Question 20:
A basket contain green, black and blue balls in the ratio 5 : 2 : 1. If there are 10 blue balls. Find the corresponding new ratio when 10 green and 10 black balls are removed from the basket
  • A 1 : 1 : 1
  • B 4 : 2 : 1
  • C 5 : 1 : 1
  • D 4 : 1 : 1
View Answer & Explanation