MCQ on Ratio and Proportion

MCQ on Ratio and Proportion

1-I have a box which has 3 green, 9 blue, 4 yellow, 8 orange colored cubes in it

(a) What is the ratio of orange to yellow cubes?

(b) What is the ratio of green to blue cubes?

(c) How many different ratios can be formed, when you compare each color to any one of the other colors?

(a)          (b)            (c)

(A) 3:1         1:2          10 ratios

(B) 1:3         2:1          4 ratios

(C) 1:2         3:1          12 ratios

(D) 2:1         1:3          12 ratios

2-The equivalent ratio of 2:7 is

(A) 4 : 7

(B) 8 : 21

(C) 6 : 14

(D) 6 : 21

3-If A:B=1/2 : 3/8; B:C=1/3 : 5/9 and C:D=5/6 : ¾, then the ratio A:B:C:D is

(A) 4:6:8:10

(B) 8:6:10:9

(C) 6:4:8:10

(D) 6:8:9:10

4-Two angles are in the ratio 4: 9 and their supplementary angles are in the ratio 8: 3 then the two angles are respectively

(A) 60, 135

(B) 30, 90

(C) 40, 100

(D) 80, 40

5- If x:y = 2:3 then find (6x -y):(3x+ 2y)

(A) 2:3

(B) 3:2

(C) 3:4

(D) 4:3

6- Three tangent galvanometer have turns ratio of 2 : 3 : 5 when connected in series in a circuit, they show deflection of 30°, 45°, 60° respectively. Find the ratio of their radii

(A) 1:2:3

(B) 1:3:6

(C) 6:3√3:5

(D) 1:4:9

7- If A:B:C=2:3:4 then A/B:B/C:C/A is equal to

(A) 4:9:16

(B) 7:9:12

(C) 7:9:16

(D) 8:9:24

8- If the area of two spheres are in the ratio 1: 4 then the ratio of their volumes is

(A) 1:2

(B) 1:3

(C) 1:5

(D) 1:8

9-20% of (A+B) = 50%(A-B). Find the ratio of A and B.

(A) 3:8

(B) 8:3

(C) 3:7

(D) 7:3

10-In a village, 15% are children, 40% are women. There are 900 people in the village. What is the ratio of Men: Women: Children?

(A) 9:5:4

(B) 9:8:3

(C) 7:9:4

(D) 8:9:3