Multiple choice

X is 3 years older than Y, who is double the age of Z. If the sum of their ages is 28, how old is Y?

  1. 10 years

  2. 13 years

  3. 5 years

  4. 9 years

  5. None of these

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A Correct answer
Explanation

Let the age of Z be x, age of Y be 2x and age of X be 2x+3.

Sum of ages = x+2x+2x+3 = 5x+3 5x+3 = 28 or 5x = 25 or x = 5