Multiple choice

DIRECTION for the question: Solve the following question and mark the best possible option. A father is now three times as old as his son. Five years back, he was four times as old as his son. What is the age of the son (in years

  1. 12

  2. 15

  3. 18

  4. 20

  5. 22
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let the son's age be x and the father's be 3x. Five years ago, (3x - 5) = 4(x - 5). Solving this, 3x - 5 = 4x - 20, so x = 15.

AI explanation

Let the son's present age be x years, making the father's present age 3x years. Five years ago, their ages were (x - 5) and (3x - 5), so we write the equation 3x - 5 = 4(x - 5). Solving this gives 3x - 5 = 4x - 20, which simplifies to x = 15. The son is 15 years old.

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