Ratio of present ages of A and B is 5:6. After 9 years, the ratio becomes 7:7. Present age of A is? MCQ with Answer and Explanation
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Question #1
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If a:b = 8:3 and b:c = 3:9, then a:b:c = ?
Correct Answer: Option D
Explanation:
Combine ratios: a:b = 8:3, b:c = 3:9 ⇒ a:b:c = 8:3:9.
Combine ratios: a:b = 8:3, b:c = 3:9 ⇒ a:b:c = 8:3:9.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Two numbers are in ratio 12:7. Their difference is 51. What is their sum?
Correct Answer: Option C
Explanation:
Numbers 12k, 7k. Difference |12-7|k = 51 ⇒ k = 10. Sum = (12+7)k ≈ 456.
Numbers 12k, 7k. Difference |12-7|k = 51 ⇒ k = 10. Sum = (12+7)k ≈ 456.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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If a:b = 3:6 and b:c = 6:7, then a:b:c = ?
Correct Answer: Option A
Explanation:
Combine ratios: a:b = 3:6, b:c = 6:7 ⇒ a:b:c = 3:6:7.
Combine ratios: a:b = 3:6, b:c = 6:7 ⇒ a:b:c = 3:6:7.
This question belongs to:
Maths
Ratio and Proportion
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