If a:b = 2:9 and b:c = 9:4, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 2:9 and b:c = 9:4, then a:b:c = ?

A. 1:9:5

B. 2:10:4

C. 2:9:4

D. 4:18:8

Answer: Option C

Combine ratios: a:b = 2:9, b:c = 9:4 ⇒ a:b:c = 2:9:4.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 10:5 and their sum is 127. Find the numbers.

A. 80 and 40

B. 92 and 20

C. 61 and 55

D. 160 and 80

Correct Answer: Option A

Explanation:
Numbers = 10k and 5k. 10k + 5k = 127 ⇒ k = 8. Thus, numbers are 80 and 40.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 4:9 and b:c = 9:11, then a:b:c = ?

A. 4:10:11

B. 4:9:11

C. 8:18:22

D. 3:9:12

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:9, b:c = 9:11 ⇒ a:b:c = 4:9:11.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 8:5 and b:c = 5:6, then a:b:c = ?

A. 7:5:7

B. 8:6:6

C. 8:5:6

D. 16:10:12

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:5, b:c = 5:6 ⇒ a:b:c = 8:5:6.

This question belongs to: Maths Ratio and Proportion