There is a jail room with two doors. There is a guard at each of the doors. One of them always tells truth & the other one always tells 100% lies.
One of the two doors leads to freedom, the other door leads to 50 years imprisonment in a dark cell. Also it is not known which of the guard tells the truth, which one tells lies (but the guards know among them their nature).
Suppose you are imprisoned in that jail room & now you are given a chance to get freedom by asking only one question to any one of the guards.
Frame the suitable question which you will ask so that you know the real door leading to freedom & get out.
Wrong door will lead to another 50years in dark cell.
2007-01-19 22:28:20 · 14 answers · asked by Rjoy 1 in Social Science ➔ Psychology
you can ask any question about the other gaurd, like
"will the other guard say he is a truth teller or a liar"
"which door will the other guard tell me is freedon"
or you can ask any question that is obviously known
"is it daytime"
"are you a guard"
"are you alive"
"am i male/female"
2007-01-19 22:45:17 · answer #1 · answered by Anonymous · 1⤊ 1⤋
I love this one. The answer is "what would the other guard say" or "what would the other guard tell me". The liar guard is lying so do the opposite and the truth guard will give you the answer that the lying guard would give. The is right because you would do the opposite no matter what.
I love this riddle and I've heard it before and I know for a fact that this is the right answer.
2007-01-20 10:18:43 · answer #2 · answered by I'm done 2 · 0⤊ 0⤋
Where is the jail? What are the two doors made of? Male or female guards? What is freedom?
2007-01-27 17:26:26 · answer #3 · answered by museforlife 1 · 0⤊ 0⤋
Even if you ask a "known" question you still don't know which door leads to which area though. Somehow the question needs to relate to which guard is the liar as well as which door leads where. So asking "is it daytime" limits you to finding out only which guard is the liar.
But I can't honestly think of how to word it so you can get the right answer. TRICKY QUESTION! nicely played, this will haunt me all night
**EDIT** I see it was answered. and brilliantly so. Thank you, now I can sleep!
2007-01-19 22:54:30 · answer #4 · answered by gretz_2324 2 · 1⤊ 0⤋
ask the opposite,"Which door will keep me 50 years imprisonment". truth guard will tell the truth, the possibility the liar guard will tell the truth is very minimal, because of the nature of the interest of freedom.
2007-01-19 23:49:12 · answer #5 · answered by Anonymous · 0⤊ 1⤋
approach door 1
ask guard 1 if that is the door to freedom if it is and
if he's the one who lies he will answer no.
if it isn't guard 1 will answer yes.
then ask guard 2 if guard 1 is telling the truth
If he is the one who tells the truth. he will say no
and choose door 2
if he says yes then choose door 1
2007-01-27 15:09:16 · answer #6 · answered by ? 6 · 0⤊ 0⤋
Which door would the other guard tell me leads to freedom?
(Pick whichever door he doesn't point to.)
2007-01-19 22:38:03 · answer #7 · answered by gelfling 7 · 0⤊ 0⤋
Is the LIAR in front of the door to freedom?
If you ask the Liar and he is in front of the door to freedom he will say NO...
If you ask the Honest Guard and he is in front of the door to freedom he will say NO...
If you ask the Liar and he is in front of the door to jail he will say Yes...
If you ask the Honest guard and he is in front of the door to jail he will say Yes...
Therefore you take the door of the man saying NO and reject the door of the man saying YES
2007-01-19 22:51:59 · answer #8 · answered by riffyxraff 3 · 1⤊ 2⤋
Reminds me of the bit in the labyrinth when Sarah gets to the two doors and has to figure out which door keeper is the liar "One door leads directly to the castle, the other to (bum bum bum bum!) Certain Doom!!!"
2007-01-19 23:44:56 · answer #9 · answered by Anonymous · 0⤊ 0⤋
The question I would ask is "Are you a guard?"
The liar would say no, and the truthful guard would say yes. And, then I'd know which door to enter.
2007-01-19 22:34:40 · answer #10 · answered by boombabybob 3 · 4⤊ 3⤋