✅ Answer: There are only three people: a grandfather, his son, and his grandson.
The son is BOTH a son (to the grandfather) AND a father (to the grandson). So “two fathers and two sons” = three people, not four.
If you said “impossible” — you fell for the number trap. Your brain heard “two + two = four people” and stopped thinking.
Your score: __/15
Next: ➡️ Riddle #6
