If a:b = 6:9 and b:c = 9:9, then a:b:c = ? MCQ with Answer and Explanation

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

A. 6:10:9

B. 6:9:9

C. 12:18:18

D. 5:9:10

Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

No comments yet. Be the first to start the discussion!

Question #1 Report Error

Two numbers are in ratio 6:4. Their difference is 60. What is their sum?

A. 175

B. 350

C. 497

D. 381

Correct Answer: Option B

Explanation:
Numbers 6k, 4k. Difference |6-4|k = 60 ⇒ k = 30. Sum = (6+4)k ≈ 350.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 2:5 and b:c = 5:10, then a:b:c = ?

A. 1:5:11

B. 2:5:10

C. 4:10:20

D. 2:6:10

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 2:5, b:c = 5:10 ⇒ a:b:c = 2:5:10.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in the ratio 7:15 and their sum is 349. Find the numbers.

A. 94 and 237

B. 210 and 450

C. 115 and 199

D. 105 and 225

Correct Answer: Option D

Explanation:
Numbers = 7k and 15k. 7k + 15k = 349 ⇒ k = 15. Thus, numbers are 105 and 225.

This question belongs to: Maths Ratio and Proportion