A father is now three times as old as his son. Five years back, he was four times as old as his son. The age of the son (in years) is:
Q1. A father is now three times as old as his son. Five years back, he was four times as old as his son. The age of the son (in years) is:
Answer: 15
Explanation: Let son's current age = s; father = 3s; five years ago: 3s−5 = 4(s−5) → 3s−5 = 4s−20 → s = 15.