Multiple choice

The sum of the ages of A, B, and C is 96 years. 10 years ago, the ratio of their ages was 1:2:3 respectively. What is the present age of A?

  1. 15 years

  2. 12 years

  3. 21 years

  4. 13 years

  5. 16 years
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let ages 10 years ago be x, 2x, 3x. Sum = 6x. Present ages: x+10, 2x+10, 3x+10. Sum = 6x+30 = 96. 6x = 66, x = 11. A's present age = x+10 = 21.

AI explanation

Ten years ago, the total age of A, B, and C was 96 - 30 = 66 years. Using the ratio 1:2:3, A's age ten years ago was (1/6) * 66 = 11 years. Therefore, A's present age is 11 + 10 = 21 years.

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