If a:b = 6:7 and b:c = 7:12, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 6:7 and b:c = 7:12, then a:b:c = ?

A. 6:8:12

B. 12:14:24

C. 6:7:12

D. 5:7:13

Answer: Option C

Combine ratios: a:b = 6:7, b:c = 7:12 ⇒ a:b:c = 6:7:12.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in ratio 11:4. Their difference is 116. What is their sum?

A. 585

B. 292

C. 695

D. 621

Correct Answer: Option A

Explanation:
Numbers 11k, 4k. Difference |11-4|k = 116 ⇒ k = 16. Sum = (11+4)k ≈ 585.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 5:14 and their sum is 285. Find the numbers.

A. 96 and 184

B. 58 and 219

C. 75 and 210

D. 150 and 420

Correct Answer: Option C

Explanation:
Numbers = 5k and 14k. 5k + 14k = 285 ⇒ k = 15. Thus, numbers are 75 and 210.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 6:9 and b:c = 9:9, then a:b:c = ?

A. 5:9:10

B. 6:10:9

C. 6:9:9

D. 12:18:18

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:9 ⇒ a:b:c = 6:9:9.

This question belongs to: Maths Ratio and Proportion