Ian and Sydney are staying in different rooms in the same hotel. Ian needs to give a gold pendant to Sydney, but both are unable to leave their room. The only way they can transfer objects is by using the bellhops. Both Ian and Sydney have a safe with a large clasp that can be secured with padlocks. Both Ian and Sydney have a padlock and a corresponding key. (So 1 gold pendant, 2 safes, 2 padlocks, and 2 keys.) But the bellhops are thieves. Anything that is not padlocked in the safe will be stolen by the bellhops – including any unlocked padlocks, the keys or the pendant. How can Ian transfer the gold pendant to Sydney without it being stolen?
Difficulty Rating: 14