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

Question 36:

• JAMB 2006

The cost of renovating a 6 m square room is N540. What is the cost of renovating a 9 m square room?

A. N1215
B. N720
C. N1620
D. N810

Question 37:

• JAMB 2009

A student spent 1/5 of his allowance on books, 1/2 of remainder on food and kept the rest for contingencies. What fraction was kept?

A. ⁷/₁₅
B. ⁸/₁₅
C. ²/₅
D. ⁴/₅

Question 38:

• JAMB 2010

If p : q = \(\frac{2}{3}\) : \(\frac{5}{6}\) and q : r = \(\frac{3}{4}\) : \(\frac{1}{2}\), find p : q : r

A. 12 : 15 : 10
B. 12 : 15 : 16
C. 10 : 15 : 24
D. 9 : 10 : 15

Question 39:

• JAMB 2011

If the numbers M, N, Q are in the ratio 5:4:3, find the value of \(\frac{2N - Q}{M}\)

A. 2
B. 3
C. 1
D. 4

Question 40:

• JAMB 2011

Raial has 7 different posters to be hanged in her bedroom, living room and kitchen. Assuming she has plans to place at least a poster in each of the 3 rooms, how many choices does she have?

A. 49
B. 170
C. 21
D. 210