Ratio and Proportion Questions and Answers Aptitude Problems

Ratio and Proportion Questions and Answers:

Q.11 Two numbers are in the ratio 3 : 4 and the product of their LCM and HCF is 10800. The sum of the numbers is……

(A) 180

(B) 210

(C) 225

(D) 240

Q. 12 The ages of x and y are in the ratio of 3 : 1. 15 years hence, the ratio will be 2 : 1. Their present ages (in years) are…..

(A) 30, 10

(B) 45, 15

(C) 21, 7

(D) 60, 20

To know more about Input and Output System: input-and-output-system-objective-type-question-for-competitive-exams-part-c

Q.13 Gold is 19 times as heavy as water and copper is 9 times as heavy as water. In what ratio should there be mixed to get 15 times as heavy as water.

(A) 1 : 1

(B) 2 : 3

(C) 1 : 2

(D) 3 : 2

Q.14 85 liters of a mixture contains milk and water in the ratio 27 : 7. How much water is to be added to get a new mixture containing milk and water in the ratio 3 :1?

(A) 5 lt

(B) 6.5 lt

(C) 7.25 lt

(D) 8 lt 

Q.15 A and B are two alloys of gold and copper prepared by mixing metals in the ratio 7 : 2 and 7 : 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, then ratio of gold and copper in C will be….

(A) 5 : 9

(B) 5 : 7

© 7 : 5

(D) 9 : 5

Q.16 A mixture contains milk and water in the ratio 5 : 1. On adding 5 liters of water, the ratio of milk to water becomes 5 : 2. The quantity of milk in the original mixture is….

(A) 16 lt.

(B) 25 lt.

(C) 22.75 lt.

(D) 32.5 lt.

Q.17 The LCM and HCF of two numbers x and y are l and h respectively. Then….

(A) l : h = x : y

(B) x : h = l : y

(C) x : l = y : h

(D) x : h = y : l

Q. 18 If a + b : b + c : c + a = 6 : 7 : 8 and a +b +c = 14, then the value of c is…..

(A) 6

(B) 7

(C) 8

(D) 14

Q.19 Which of the following is greatest 3 : 4, 5 : 6, 6 : 7, 4 : 5?

(A) 3 : 4

(B) 4 : 5

(C) 5 : 6

(D) 6 : 7

Q.20 The ratio between the numbers is 3 : 4 and the sum of their squares is 625. The numbers are……

(A) 6, 8

(B) 15, 20

(C) 18, 24

(D) 20, 25