You are trapped in a dimly lit dungeon...

Riddle: You are trapped in a dimly lit dungeon deep below the city of Berlin. There are two doors in the dungeon. You know that one door leads to freedom, and a holiday in the Canary Islands, while the other leads to death. There are two armed giants, each guarding one of the doors. You know that the giants' names are Ivan and Mike. You do not know which is which. You also know that one of them always tells the truth, while the other always tells lies. Yet again, you do not know which is which. You are allowed to ask one of the giants one question. What question should you ask?

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Answer: You should ask one guard which door would the other guard pick as safe and choose the opposite door. The truthful guard will tell you that the other (the liar) will pick door X (wrong one). The liar will lie and tell you that the truthful guard would pick door X (wrong one).

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