Find the mean proportional between 4 and 32. MCQ with Answer and Explanation

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Find the mean proportional between 4 and 32.

A. 36

B. 11

C. 22

D. 14

Answer: Option B

Solution (By JKSSB Mock Tests)

Mean proportional = √(4 × 32) = √(128) = 11.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 7:4. Their difference is 53. What is their sum?

A. 209

B. 418

C. 471

D. 547

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Correct Answer: Option B

Explanation:
Numbers 7k, 4k. Difference |7-4|k = 53 ⇒ k = 17. Sum = (7+4)k ≈ 418.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 2:3 and b:c = 3:5, then a:b:c = ?

A. 4:6:10

B. 2:3:5

C. 1:3:6

D. 2:4:5

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:5 ⇒ a:b:c = 2:3:5.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 3:5 and b:c = 5:10, then a:b:c = ?

A. 3:5:10

B. 6:10:20

C. 3:6:10

D. 2:5:11

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:5, b:c = 5:10 ⇒ a:b:c = 3:5:10.

This question belongs to: Maths Ratio and Proportion

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