Ratio & Proportion (MCQ )

1. Ratio of the earnings of A and B is 4 : 7. If the earnings of A increase by 50% and those of B decrease by 25%, the new ratio of their earnings becomes 8 : 7. What are A’s earnings?
(a) Rs.25,000
(b) Rs.26,000
(c) Rs.29,000
(d) Rs.24,000

2. What least number must be subtracted from each of the numbers 14, 17, 34 and 42 so that the remainders may be proportional?
(a) 4
(b) 3
(c) 2
(d) 9

3. In a mixture of 60 litres, the ratio of milk and water is 2 : 1. If this ratio is to be 1 : 2, then the quantity of water to be further added is:
(a) 30 litres
(b) 70 litres
(c) 40 litres
(d) 60 litres

4. The fourth proportional to 5, 8, 15 is :
(a) 22
(b) 24
(c) 23
(d) 20

5. The mean proportional between 234 and 104 is:
(a) 16
(b) 40
(c) 54
(d) None of these

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