Find the mean proportional between 33 and 15. MCQ with Answer and Explanation

Find the mean proportional between 33 and 15.

A. 22

B. 25

C. 44

D. 48

Answer: Option A

Mean proportional = √(33 × 15) = √(495) = 22.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 7:8 and their sum is 572. Find the numbers.

A. 532 and 608

B. 266 and 304

C. 296 and 283

D. 246 and 324

Correct Answer: Option B

Explanation:
Numbers = 7k and 8k. 7k + 8k = 572 ⇒ k = 38. Thus, numbers are 266 and 304.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 12:9 and their sum is 368. Find the numbers.

A. 408 and 306

B. 219 and 124

C. 187 and 162

D. 204 and 153

Correct Answer: Option D

Explanation:
Numbers = 12k and 9k. 12k + 9k = 368 ⇒ k = 17. Thus, numbers are 204 and 153.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 3:9 and b:c = 9:10, then a:b:c = ?

A. 2:9:11

B. 3:9:10

C. 3:10:10

D. 6:18:20

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:9, b:c = 9:10 ⇒ a:b:c = 3:9:10.

This question belongs to: Maths Ratio and Proportion