If a:b = 3:7 and b:c = 7:11, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 3:7 and b:c = 7:11, then a:b:c = ?

A. 2:7:12

B. 3:7:11

C. 6:14:22

D. 3:8:11

Answer: Option B

Combine ratios: a:b = 3:7, b:c = 7:11 ⇒ a:b:c = 3:7:11.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in ratio 11:5. Their difference is 105. What is their sum?

A. 320

B. 414

C. 160

D. 368

Correct Answer: Option A

Explanation:
Numbers 11k, 5k. Difference |11-5|k = 105 ⇒ k = 17. Sum = (11+5)k ≈ 320.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

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

A. 8:8:8

B. 3:4:5

C. 4:4:4

D. 4:5:4

Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 2:5 and b:c = 5:7, then a:b:c = ?

A. 4:10:14

B. 1:5:8

C. 2:5:7

D. 2:6:7

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:5, b:c = 5:7 ⇒ a:b:c = 2:5:7.

This question belongs to: Maths Ratio and Proportion