There are two men and two doors, with one man at each door. One man always tells the truth while the other one always lies. Beyond one door is a paradise and beyond the other is a terrible place. Both of the doors look the same and you don't know which man is which. Using only one question, what would you ask to either man that would guarantee that you go through the door with the paradise behind it?
And no peeking through one door first.
Anyways, I'm off for th' night, so if I don't respond, then wait for about 8 hours. It's a school night.