Ratio, proportion and rate - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 1982

Given that p:q = \(\frac{1}{3}\):\(\frac{1}{2}\) and q:r = \(\frac{2}{5}\), find p:r

A. 4:105
B. 7:15
C. 20:21
D. 2:35
E. 3:20

Question 17:

• JAMB 1985

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

Question 18:

• JAMB 1985

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

Question 19:

• JAMB 1985

John gives one-third of his money to Janet who has N105.00. He then finds that his money is reduced to one-fourth of what Janet now has. Find how much money john has at first

A. N45.00
B. N48.00
C. N52.00
D. N60.00
E. N52.00

Question 20:

• JAMB 1986

Three boys shared some oranges. The first received \(\frac{1}{3}\) of the oranges, the second received \(\frac{2}{3}\) of the remainder. If the third boy received the remaining 12 oranges, how many oranges did they share?

A. 60
B. 54
C. 48
D. 42