If a:b = 5:3 and b:c = 3:4, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 5:3 and b:c = 3:4, then a:b:c = ?

A. 10:6:8

B. 5:4:4

C. 4:3:5

D. 5:3:4

Answer: Option D

Combine ratios: a:b = 5:3, b:c = 3:4 ⇒ a:b:c = 5:3:4.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in ratio 6:12. Their difference is 108. What is their sum?

A. 207

B. 447

C. 554

D. 414

Correct Answer: Option D

Explanation:
Numbers 6k, 12k. Difference |6-12|k = 108 ⇒ k = 18. Sum = (6+12)k ≈ 414.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 6:3 and b:c = 3:4, then a:b:c = ?

A. 6:3:4

B. 5:3:5

C. 6:4:4

D. 12:6:8

Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:3, b:c = 3:4 ⇒ a:b:c = 6:3:4.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in ratio 9:5. Their difference is 105. What is their sum?

A. 287

B. 633

C. 574

D. 684

Correct Answer: Option C

Explanation:
Numbers 9k, 5k. Difference |9-5|k = 105 ⇒ k = 26. Sum = (9+5)k ≈ 574.

This question belongs to: Maths Ratio and Proportion