If a:b = 2:9 and b:c = 9:7, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 2:9 and b:c = 9:7, then a:b:c = ?

A. 1:9:8

B. 2:9:7

C. 4:18:14

D. 2:10:7

Answer: Option B

Combine ratios: a:b = 2:9, b:c = 9:7 ⇒ a:b:c = 2:9:7.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in ratio 9:5. Their difference is 112. What is their sum?

A. 210

B. 420

C. 448

D. 569

Correct Answer: Option B

Explanation:
Numbers 9k, 5k. Difference |9-5|k = 112 ⇒ k = 28. Sum = (9+5)k ≈ 420.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in ratio 7:12. Their difference is 133. What is their sum?

A. 507

B. 434

C. 199

D. 399

Correct Answer: Option D

Explanation:
Numbers 7k, 12k. Difference |7-12|k = 133 ⇒ k = 26. Sum = (7+12)k ≈ 399.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in ratio 9:7. Their difference is 150. What is their sum?

A. 144

B. 423

C. 326

D. 288

Correct Answer: Option D

Explanation:
Numbers 9k, 7k. Difference |9-7|k = 150 ⇒ k = 75. Sum = (9+7)k ≈ 288.

This question belongs to: Maths Ratio and Proportion