type 3 addition subtraction product on ratio & proportion Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

The sum of three numbers is 68. If the ratio of the first to the second be 2 : 3 and that of the second to the third be 5 : 3, then the second number is

a) 20

b) 48

c) 58

d) 30

Question : 2

In a 45 litres mixture of milk and water, the ratio of the milk to water is 2 : 1. When some quantity of water is added to the mixture, this ratio becomes 1 : 2. The quantity of water added is

a) 35 litres

b) 45 litres

c) 21 litres

d) 10 litres

Question : 3

The ratio between a two - digit number and the sum of the digits of that number is 4 : 1. If the digit at the unit’s place is 3 more than the digit at the ten's place, then the number is

a) 36

b) 25

c) 69

d) 47

Question : 4

Four numbers are in the ratio 1 : 2 : 3 : 4. Their sum is 16. The sum of the first and fourth number is equal to :

a) 10

b) 80

c) 8

d) 5

Question : 5

Three numbers are in the ratio 5 : 6 : 7. If the product of the numbers is 5670, then the greatest number is

a) 21

b) 28

c) 18

d) 15

Question : 6

What number should be subtracted from both terms of the ratio 15 : 19 in order to make it 3 : 4 ?

a) 5

b) 3

c) 6

d) 9