Posted by idiosyncratic35 at nfmthfw.nmhschool.org on January 24, 2003 at 22:36:10:
Bob is locked in a crappy dungeon with three doors, all with signs posted on them. He knows that behind one of the doors is freedom, and behind the other two doors are dragons (which will brutally maul him, because that's what they do). He also knows that at least one of the signs is telling the truth, and that at least one of the signs is lying. The signs read:
Door 1: Freedom is not behind this door.
Door 2: Freedom is not behind this door.
Door 3: Freedom is not behind the blue door.
He thinks for a second and then leaves through door number 3. Which is the blue door?
please answer?