Multiple choice

The following questions are accompanied by three statements A, B and C. You have to determine which statement(s) is/are sufficient. What will be the ratio between the ages of Rahul and Prem after 5 years? A. Rahul's present age is more than Prem's present age by 4 years. B. Prem's present age is 20 years. C. Prem and Rahul's present ages are in the ratio 4:5.

  1. Only A and either B or C

  2. Only B

  3. Only C

  4. Only either A or C

  5. Only either B or C
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A Correct answer
Explanation

We need Rahul and Prem's present ages to find the ratio after 5 years. Statement A gives the difference. Statement B gives Prem's age. Statement C gives the present ratio. Combining A and C works: if ratio is 4:5 and difference is 4, then ages are 16 and 20. After 5 years: 21 and 25, ratio is 21:25. Combining A and B also works: Prem is 20, so Rahul is 24. After 5 years: 25 and 29, ratio is 25:29. We need either B or C with A.

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