✅ Answer: There are only 3 people — a grandfather, his son, and his grandson.
The son is BOTH a father (to the grandson) AND a son (to the grandfather). So “two fathers and two sons” = 3 people, not 4.
Your brain assumed 4 separate people. The word “and” made it feel like they were all different.
Your score: __/15
Next: ➡️ Question #12
