Two numbers are in ratio 9:7. Their difference is 150. What is their sum? MCQ with Answer and Explanation
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Question #1
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If a:b = 2:5 and b:c = 5:10, then a:b:c = ?
Correct Answer: Option D
Explanation:
Combine ratios: a:b = 2:5, b:c = 5:10 ⇒ a:b:c = 2:5:10.
Combine ratios: a:b = 2:5, b:c = 5:10 ⇒ a:b:c = 2:5:10.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 7:5. After 10 years, the ratio becomes 8:8. Present age of A is?
Correct Answer: Option B
Explanation:
Let ages 7k and 5k. Then (7k + 10)/(5k + 10) = 8/8. Solving gives k ≈ 19, age of A = 7*19 = 133.
Let ages 7k and 5k. Then (7k + 10)/(5k + 10) = 8/8. Solving gives k ≈ 19, age of A = 7*19 = 133.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Two numbers are in the ratio 12:9 and their sum is 569. Find the numbers.
Correct Answer: Option A
Explanation:
Numbers = 12k and 9k. 12k + 9k = 569 ⇒ k = 27. Thus, numbers are 324 and 243.
Numbers = 12k and 9k. 12k + 9k = 569 ⇒ k = 27. Thus, numbers are 324 and 243.
This question belongs to:
Maths
Ratio and Proportion
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