Multiple choice

A father's age is 5 times more than his son. His son's age is 6 years. After how many years will the father's age be four times his son's age?

  1. 5 years

  2. 6 years

  3. 4 years

  4. 2 years
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Son's current age is 6 years. Father's age is 5 times the son's age, so father is 30 years old. Let x years be added. Then (30 + x) = 4(6 + x), which gives 30 + x = 24 + 4x, so 3x = 6, and x = 2. After 2 years, father will be 32 and son will be 8, satisfying the 4:1 ratio.

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