Two numbers are in the ratio 7:4 and their sum is 257. Find the numbers. MCQ with Answer and Explanation
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Question #1
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If a:b = 4:7 and b:c = 7:4, then a:b:c = ?
Correct Answer: Option D
Explanation:
Combine ratios: a:b = 4:7, b:c = 7:4 ⇒ a:b:c = 4:7:4.
Combine ratios: a:b = 4:7, b:c = 7:4 ⇒ a:b:c = 4:7:4.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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If a:b = 2:8 and b:c = 8:4, then a:b:c = ?
Correct Answer: Option C
Explanation:
Combine ratios: a:b = 2:8, b:c = 8:4 ⇒ a:b:c = 2:8:4.
Combine ratios: a:b = 2:8, b:c = 8:4 ⇒ a:b:c = 2:8:4.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Ratio of present ages of A and B is 5:8. After 12 years, the ratio becomes 6:11. Present age of A is?
Correct Answer: Option A
Explanation:
Let ages 5k and 8k. Then (5k + 12)/(8k + 12) = 6/11. Solving gives k ≈ 11, age of A = 5*11 = 55.
Let ages 5k and 8k. Then (5k + 12)/(8k + 12) = 6/11. Solving gives k ≈ 11, age of A = 5*11 = 55.
This question belongs to:
Maths
Ratio and Proportion
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