Two numbers are in the ratio 15:6 and their sum is 521. Find the numbers. MCQ with Answer and Explanation

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Two numbers are in the ratio 15:6 and their sum is 521. Find the numbers.

A. 375 and 127

B. 347 and 158

C. 720 and 288

D. 360 and 144

Answer: Option D

Solution (By JKSSB Mock Tests)

Numbers = 15k and 6k. 15k + 6k = 521 ⇒ k = 24. Thus, numbers are 360 and 144.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 22 and 16.

A. 36

B. 21

C. 38

D. 18

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Correct Answer: Option D

Explanation:
Mean proportional = √(22 × 16) = √(352) = 18.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 4:9 and b:c = 9:8, then a:b:c = ?

A. 4:9:8

B. 3:9:9

C. 4:10:8

D. 8:18:16

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 4:9, b:c = 9:8 ⇒ a:b:c = 4:9:8.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 2:3 and b:c = 3:9, then a:b:c = ?

A. 4:6:18

B. 1:3:10

C. 2:4:9

D. 2:3:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:9 ⇒ a:b:c = 2:3:9.

This question belongs to: Maths Ratio and Proportion

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