Your are being held in a room with only two doors. One door leads to freedom the second door leads to a death chamber (where you will be killed if you enter it). By each door a guard is standing. One guard <i>always</I> tells the truth the other guard <i>always</I>lies. You can put only one times one question to one guard only. What are you going to ask?
"If you were the other guard, which exit would you say is the death chamber?" and go into that one.(assuming the guards know which door is which)
ja. Here's another one, if people are up for making this a thread with a bunch of stumpers. You are in a room, and in the next room is a lamp. there are three switches in front of you. how can you tell which switch turns the light on? limitations: 1)you can only enter the other room once. 2)no light can get from the other room into your room or vise versa. 3)there are no windows in either room. 3a)basically, no light can exit the room with the lamp, you *have* to enter the room to see if the bulb is lit. 4)the lamp cannot be moved. 5)the walls are made out of god-concrete and can't be broken, bent, transformed or changed in any way. 6)you do not have access to the main wiring blueprints for the building. 7)blowing up the building and going home are not options.
Turn one switch on for a while to let the bulb heat up (if it's the right switch). Then turn that one off, quickly turn on a second switch and go into the room. If the bulb is on, then it was the second switch you threw. If the bulb is off and is warm, then it was the first switch. If it is cool and off then it was the switch you didn't throw.
One more then: there is this bad king who likes to liquidate his oponents frequently. But to keep good public relations record the king lets the executioner to give the prisoners the last chance to save themselves. They can pick one small ball from a black sack which contains two balls 1 black and 1 white. If the prisoner picks the white ball he gets pardon. If the ball is black he is beheaded. Now the king wants one dangerous human rights activist dead proper. So he orders the executioner to put two black balls in the black sack to be sure that this one will be beheaded. To complicate the thigs a bit a remorsefull executioner betrays to the prisoner that the king is cheating on him: that both balls will black. The prisoner makes his choice the next mornig and the king has to pardon him. How could the prisoner have achieved that?
original thinking, but no, he had nothing on - only a piece of rag around his waist and nothing under it (besides the "customary" equipment Please Register or Log in to view the hidden image! ) But he went away free, that's for sure.
Takes out both balls to show the audience that he was being cheated... so instead having people hate him, he pardons the prisoner
the winner. To swallow the <i>small</i> ball is the thing to do. It does not compromise the king as a cheater. If the prisoner would say Uups, I wanted to kiss the ball for luck and by mistake swallowed it but it was the white ball, then they have to prove it to him that it was not white. That's what they cannot do because the remaining ball is black. Good reasoning curioucity
