Ques 1

If a : b = 2 : 3 and b : c = 5 : 7, find the value of a : b : c ?

a) 5 : 7 : 13

b) 10 : 15 : 17

c) 10 : 15 : 21

d) 7 : 15 : 13

c is the correct option

Ques 2

What is the fourth proportional to 3, 7, 15.?

a) 15

b) 25

c) 30

d) 35

d is the correct option

Ques 3

What is the fourth proportional to 3, 7, 15.?

a) 2

b) 4

c) 16

d) 32

c is the correct option

Ques 4

Find the fourth proportion of 12,16,18?

a) 22

b) 24

c) 28

d) 30

b is the correct option

Ques 5

Find the third proportion of 18,36?

a) 22

b) 24

c) 48

d) 72

d is the correct option

Ques 6

There are 450 students in a school and there are two sections A & B in the school. There are three streams
in each section i.e., Art, Science & Commerce. (75/4)% of total students in A are in Commerce and (200/7)% of total students in B are in Science. Sum of total students in Commerce in A & total students in Science in B is 105. (400/21)% of total students in B are in Commerce and 50% of total students in A are in Art.

Find the ratio of total students in Commerce in B to total students in Science in A?

a) 8 : 15

b) 8 : 17

c) 8 : 13

d) 8 : 11

is the correct option