Multiple choice

The ratio between the ages of A and B is 3: 11. B is 12 years younger than C. After 7 years C's age will be 85 years. What will be the present age of A's father who is 25 years elder than A?

  1. 43

  2. 45

  3. 67

  4. 69
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A Correct answer
Explanation

C's present age = 85 - 7 = 78 years. B's age = 78 - 12 = 66 years. A:B = 3:11, so A = (3/11) × 66 = 18 years. A's father = 18 + 25 = 43 years. The key is working backwards from C's future age.

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