If a:b = 6:3 and b:c = 3:6, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 6:3 and b:c = 3:6, then a:b:c = ?

A. 6:3:6

B. 5:3:7

C. 6:4:6

D. 12:6:12

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 6:3, b:c = 3:6 ⇒ a:b:c = 6:3:6.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 10:13 and their sum is 790. Find the numbers.

A. 332 and 454

B. 353 and 416

C. 680 and 884

D. 340 and 442

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Correct Answer: Option D

Explanation:
Numbers = 10k and 13k. 10k + 13k = 790 ⇒ k = 34. Thus, numbers are 340 and 442.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 6:8:10

B. 7:9:9

C. 14:16:18

D. 7:8:9

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in the ratio 15:6 and their sum is 278. Find the numbers.

A. 221 and 61

B. 195 and 78

C. 390 and 156

D. 181 and 92

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Correct Answer: Option B

Explanation:
Numbers = 15k and 6k. 15k + 6k = 278 ⇒ k = 13. Thus, numbers are 195 and 78.

This question belongs to: Maths Ratio and Proportion

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