Multiple choice

The sum of the ages of a father and his son is 4 times the age of the son. If the average age of the father and the son is 35 years, what is the son's age?

  1. 14 years

  2. 16 years

  3. 12 years

  4. 8 years

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Let father's age = F, son's age = S. Given F + S = 4S, so F = 3S. Also (F+S)/2 = 35, so F+S = 70. Substituting F = 3S: 3S + S = 70, so 4S = 70, S = 17.5. 17.5 years is not listed in options (14, 16, 12, 8), so 'None of these' (E) is correct.

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