Two numbers are in ratio 7:12. Their difference is 120. What is their sum? MCQ with Answer and Explanation

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Two numbers are in ratio 7:12. Their difference is 120. What is their sum?

A. 275

B. 593

C. 658

D. 551

Answer: Option D

Solution (By JKSSB Mock Tests)

Numbers 7k, 12k. Difference |7-12|k = 120 ⇒ k = 24. Sum = (7+12)k ≈ 551.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 4:6 and b:c = 6:12, then a:b:c = ?

A. 3:6:13

B. 4:6:12

C. 8:12:24

D. 4:7:12

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:6, b:c = 6:12 ⇒ a:b:c = 4:6:12.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in ratio 12:10. Their difference is 74. What is their sum?

A. 312

B. 264

C. 132

D. 387

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Correct Answer: Option B

Explanation:
Numbers 12k, 10k. Difference |12-10|k = 74 ⇒ k = 37. Sum = (12+10)k ≈ 264.

This question belongs to: Maths Ratio and Proportion

Question #3

Find the mean proportional between 11 and 38.

A. 49

B. 40

C. 20

D. 23

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Correct Answer: Option C

Explanation:
Mean proportional = √(11 × 38) = √(418) = 20.

This question belongs to: Maths Ratio and Proportion

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