Two numbers are in ratio 6:12. Their difference is 108. What is their sum? MCQ with Answer and Explanation
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Question #1
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Find the mean proportional between 22 and 16.
Correct Answer: Option B
Explanation:
Mean proportional = √(22 × 16) = √(352) = 18.
Mean proportional = √(22 × 16) = √(352) = 18.
This question belongs to:
Maths
Ratio and Proportion
Question #2
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Ratio of present ages of A and B is 6:5. After 5 years, the ratio becomes 9:6. Present age of A is?
Correct Answer: Option A
Explanation:
Let ages 6k and 5k. Then (6k + 5)/(5k + 5) = 9/6. Solving gives k ≈ 15, age of A = 6*15 = 90.
Let ages 6k and 5k. Then (6k + 5)/(5k + 5) = 9/6. Solving gives k ≈ 15, age of A = 6*15 = 90.
This question belongs to:
Maths
Ratio and Proportion
Question #3
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If a:b = 8:5 and b:c = 5:6, then a:b:c = ?
Correct Answer: Option D
Explanation:
Combine ratios: a:b = 8:5, b:c = 5:6 ⇒ a:b:c = 8:5:6.
Combine ratios: a:b = 8:5, b:c = 5:6 ⇒ a:b:c = 8:5:6.
This question belongs to:
Maths
Ratio and Proportion
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