- Cut cake into 8 pieces using 3 cuts
- 3 bulbs and 1 room puzzle
- Gold bar weighing problem (8 g)
- Find the odd ball among 6 balls
- 7L & 3L jugs — measure 4 and 5
- Sandglass 7‑min and 4‑min — measure 5 minutes
- Hat color deduction
- Pirates coin distribution
Focus on communicating assumptions, enumerating states, and proving minimality. Interviewers value clarity over speed.