Two numbers are in the ratio 15:12 and their sum is 319. Find the numbers. MCQ with Answer and Explanation
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Question #1
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If a:b = 7:5 and b:c = 5:5, then a:b:c = ?
Correct Answer: Option C
Explanation:
Combine ratios: a:b = 7:5, b:c = 5:5 ⇒ a:b:c = 7:5:5.
Combine ratios: a:b = 7:5, b:c = 5:5 ⇒ a:b:c = 7:5:5.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 3:6. After 8 years, the ratio becomes 5:8. Present age of A is?
Correct Answer: Option D
Explanation:
Let ages 3k and 6k. Then (3k + 8)/(6k + 8) = 5/8. Solving gives k ≈ 23, age of A = 3*23 = 69.
Let ages 3k and 6k. Then (3k + 8)/(6k + 8) = 5/8. Solving gives k ≈ 23, age of A = 3*23 = 69.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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Two numbers are in ratio 12:10. Their difference is 74. What is their sum?
Correct Answer: Option C
Explanation:
Numbers 12k, 10k. Difference |12-10|k = 74 ⇒ k = 37. Sum = (12+10)k ≈ 264.
Numbers 12k, 10k. Difference |12-10|k = 74 ⇒ k = 37. Sum = (12+10)k ≈ 264.
This question belongs to:
Maths
Ratio and Proportion
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