Most people rush to guess which glass will fill first in these water puzzles, often choosing glasses 3, 4, or 7. The trick? Every path is blocked:
- Glasses 1 & 5 → sealed
- Glass 2 → pipe blocked at the end
- Glasses 3, 4 & 7 → blocked midway
- Glass 6 → disconnected
Answer: No glass fills.
These puzzles work because we assume something must happen and overlook small obstacles. The key is slow down and observe carefully.