Ratio of present ages of A and B is 6:7. After 6 years, the ratio becomes 7:8. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 6:7. After 6 years, the ratio becomes 7:8. Present age of A is?

A. 47 years

B. 108 years

C. 54 years

D. 59 years

Answer: Option C

Solution (By JKSSB Mock Tests)

Let ages 6k and 7k. Then (6k + 6)/(7k + 6) = 7/8. Solving gives k ≈ 9, age of A = 6*9 = 54.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 4:9. Their difference is 73. What is their sum?

A. 557

B. 656

C. 260

D. 520

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Correct Answer: Option D

Explanation:
Numbers 4k, 9k. Difference |4-9|k = 73 ⇒ k = 14. Sum = (4+9)k ≈ 520.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 7:5. Their difference is 102. What is their sum?

A. 252

B. 647

C. 546

D. 612

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Correct Answer: Option D

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 6:7 and b:c = 7:12, then a:b:c = ?

A. 6:7:12

B. 12:14:24

C. 6:8:12

D. 5:7:13

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:7, b:c = 7:12 ⇒ a:b:c = 6:7:12.

This question belongs to: Maths Ratio and Proportion

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