Find the mean proportional between 24 and 32. MCQ with Answer and Explanation

Find the mean proportional between 24 and 32.

A. 56

B. 30

C. 54

D. 27

Answer: Option D

Mean proportional = √(24 × 32) = √(768) = 27.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in ratio 6:12. Their difference is 108. What is their sum?

A. 447

B. 554

C. 207

D. 414

Correct Answer: Option D

Explanation:
Numbers 6k, 12k. Difference |6-12|k = 108 ⇒ k = 18. Sum = (6+12)k ≈ 414.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 2:7 and b:c = 7:9, then a:b:c = ?

A. 2:7:9

B. 2:8:9

C. 1:7:10

D. 4:14:18

Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:9 ⇒ a:b:c = 2:7:9.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 3:6 and b:c = 6:9, then a:b:c = ?

A. 3:7:9

B. 2:6:10

C. 3:6:9

D. 6:12:18

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:6, b:c = 6:9 ⇒ a:b:c = 3:6:9.

This question belongs to: Maths Ratio and Proportion