Ratio of present ages of A and B is 6:5. After 5 years, the ratio becomes 7:6. Present age of A is? MCQ with Answer and Explanation

Ratio of present ages of A and B is 6:5. After 5 years, the ratio becomes 7:6. Present age of A is?

A. 54 years

B. 48 years

C. 59 years

D. 108 years

Answer: Option A

Let ages 6k and 5k. Then (6k + 5)/(5k + 5) = 7/6. Solving gives k ≈ 9, age of A = 6*9 = 54.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 13:6 and their sum is 485. Find the numbers.

A. 306 and 158

B. 342 and 131

C. 650 and 300

D. 325 and 150

Correct Answer: Option D

Explanation:
Numbers = 13k and 6k. 13k + 6k = 485 ⇒ k = 25. Thus, numbers are 325 and 150.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Find the mean proportional between 24 and 32.

A. 30

B. 56

C. 54

D. 27

Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

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

A. 8:8:18

B. 4:4:9

C. 4:5:9

D. 3:4:10

Correct Answer: Option B

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

This question belongs to: Maths Ratio and Proportion