Tag: coordination

Interview Questions

• Send a secret hour using four books on a shelf
• Two mentalists and the digit that was crossed out
• Mail a ring safely when you can't share keys
• The assistant who reveals four cards to name the fifth
• Point to the buried key by flipping one stone
• Guarantee half the room guesses their hat right
• Two identical robots on a loop that must meet
• Two switches, unknown start, prove everyone visited