If a:b = 7:9 and b:c = 9:8, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 7:9 and b:c = 9:8, then a:b:c = ?

A. 6:9:9

B. 7:9:8

C. 14:18:16

D. 7:10:8

Answer: Option B

Combine ratios: a:b = 7:9, b:c = 9:8 ⇒ a:b:c = 7:9:8.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 13:5 and their sum is 464. Find the numbers.

A. 314 and 136

B. 325 and 125

C. 341 and 114

D. 650 and 250

Correct Answer: Option B

Explanation:
Numbers = 13k and 5k. 13k + 5k = 464 ⇒ k = 25. Thus, numbers are 325 and 125.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

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

A. 10:12:14

B. 5:7:7

C. 5:6:7

D. 4:6:8

Correct Answer: Option C

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

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. 115 and 199

C. 210 and 450

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