If a:b = 7:6 and b:c = 6:5, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 7:6 and b:c = 6:5, then a:b:c = ?

A. 7:6:5

B. 6:6:6

C. 7:7:5

D. 14:12:10

Answer: Option A

Combine ratios: a:b = 7:6, b:c = 6:5 ⇒ a:b:c = 7:6:5.

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 91. What is their sum?

A. 449

B. 396

C. 198

D. 533

Correct Answer: Option B

Explanation:
Numbers 6k, 12k. Difference |6-12|k = 91 ⇒ k = 15. Sum = (6+12)k ≈ 396.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 6:4 and b:c = 4:5, then a:b:c = ?

A. 6:4:5

B. 5:4:6

C. 6:5:5

D. 12:8:10

Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:4, b:c = 4:5 ⇒ a:b:c = 6:4:5.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in the ratio 11:5 and their sum is 789. Find the numbers.

A. 524 and 251

B. 566 and 224

C. 539 and 245

D. 1078 and 490

Correct Answer: Option C

Explanation:
Numbers = 11k and 5k. 11k + 5k = 789 ⇒ k = 49. Thus, numbers are 539 and 245.

This question belongs to: Maths Ratio and Proportion