What should be the question?

Milos · 2005-05-07 05:22:12

There is a prisoner in one room with two guards. One guard stands in a front of the door which will lead prisoner to freedom if he choses that door. That guard tells truth and nothing but the truth. The other one stands in a front of the door which will lead prisoner to 5 years in prison. That one tells only lies. Prisoner can ask one question to one of the guards so the guard could answer Yes or NO. With this question he should find out through which door he should pass(logically that should be the door of freedom).

*Note: He doesn't know the connection between guards and doors(that the guard who tells truth is in a front of the door of freedom and that the other one is in a front of 5 y. in preason), but he does know that one of them tells truth and one doesn't.

Vulcan · 2005-05-08 23:51:48

for once i am stumpppedd
take that zach!

Roraborealis · 2005-05-09 03:06:08

Zach knows the answer.

Mr T · 2005-05-09 03:58:35

tis same as two cities but different

Milos · 2005-05-19 07:49:45

I would really like if someone tried to solve this puzzle. Zach?

Roraborealis · 2005-05-19 08:51:24

Most of us here know it, but I think we should leave it for someone else.

Milos · 2005-05-19 17:01:25

Ok

Mr T · 2005-05-30 23:53:44

i second that motion

zoehatestomperston · 2005-06-10 06:50:56

look look right tom preston punched me in the EYE and its black i hate him he is a women beater

zoehatestomperston · 2005-06-10 06:54:08

Mr T wrote:

tis same as two cities but different

hello sorry this is hobblie!!!!! sorry bye

Zach · 2005-06-10 09:20:21

He asks any guard, "If I were to ask the other guard, which door I would have to go through to go to freedom, which one would he say?" Then, you take the opposite.

The truth telling guard will tell you that the other will say the door to doom (Say, the left), while the lying one would tell you that the truth telling guard will tell you that he would tell him it's the left door, as he's lying about what the TTG is going to say.

Simple!

zoehatestomperston · 2005-06-11 02:34:40

yeah woteva

Zach · 2005-06-11 04:01:28

Just because you couldn't get it with your Forrest Gump brain.

zoehatestomperston · 2005-06-12 06:31:44

by the way u dont know me and ur saying this a bout me god that means u need2 get a life im sorry that i dont know u!!!!!!! and by the way i will get the boy i fancy on u because u dont me and ur saying that!!!! write bk

zoehatestomperston · 2005-06-12 06:37:33

dont swear now

zoehatestomperston · 2005-06-12 06:39:37

if u wanna email me on [snip]

Last edited by MathsIsFun (2005-06-12 10:47:11)

MathsIsFun · 2005-06-12 10:46:10

Hi zoe, don't mind Zach, I mean he is the Grim Reaper after all!

Welcome, anyway.

I hope you hang around a bit - but you have to get used to he fact that replies may take a day or so, depending on when anyone can get onto a computer!

Ummm ... you can post your email address only if you are over 13 - are you?

Zach · 2005-06-13 01:46:52

Zoe, you'll get a boy that you fancy on me? Am I supposed to be scared? 1) You don't know where I live. 2) I'm not afraid of 12 year olds. x.x

zoehatestomperston · 2005-06-13 07:07:23

i am not 12 thank u so get it right good bye

Mr T · 2005-06-22 08:52:46

he lives in Jersey, now that narrows it down!!!

MathsIsFun · 2005-06-22 10:52:10

Gosh, Zach, don't frighten off the new members!

Milos · 2005-06-23 04:41:00

Zach wrote:

He asks any guard, "If I were to ask the other guard, which door I would have to go through to go to freedom, which one would he say?" Then, you take the opposite.
The truth telling guard will tell you that the other will say the door to doom (Say, the left), while the lying one would tell you that the truth telling guard will tell you that he would tell him it's the left door, as he's lying about what the TTG is going to say.
Simple!

Well you are on the right way, but guards can only answer Yes or No, so the prisoner will have to ask different question.

zoehatestomperston · 2005-06-23 06:56:47

any but he said i was 12

ckvijayakumar · 2005-06-23 23:40:47

Milos wrote:

There is a prisoner in one room with two guards. One guard stands in a front of the door which will lead prisoner to freedom if he choses that door. That guard tells truth and nothing but the truth. The other one stands in a front of the door which will lead prisoner to 5 years in prison. That one tells only lies. Prisoner can ask one question to one of the guards so the guard could answer Yes or NO. With this question he should find out through which door he should pass(logically that should be the door of freedom).
*Note: He doesn't know the connection between guards and doors(that the guard who tells truth is in a front of the door of freedom and that the other one is in a front of 5 y. in preason), but he does know that one of them tells truth and one doesn't.

The prisoner should ask"what wpuld the other guard say if I ask him which door would lead me to freedom" and go through the other door that he points.
Explanation:If the prisoner asks the question to the liar he would not point to the door that the other prisoner would point,which is the right door.Therefore, he should go through the other door which would lead to his freedom.
If the prisoner asks the question to the guard who tells truth then also he can go through the other door[the door which is not pointed by the guard].

ckvijayakumar · 2005-06-23 23:44:51

How can you arrange 6 coins in 2 rows such that there are 4 coins in each row

Math Is Fun Forum

#1 2005-05-07 05:22:12

What should be the question?

#2 2005-05-08 23:51:48

Re: What should be the question?

#3 2005-05-09 03:06:08

Re: What should be the question?

#4 2005-05-09 03:58:35

Re: What should be the question?

#5 2005-05-19 07:49:45

Re: What should be the question?

#6 2005-05-19 08:51:24

Re: What should be the question?

#7 2005-05-19 17:01:25

Re: What should be the question?

#8 2005-05-30 23:53:44

Re: What should be the question?

#9 2005-06-10 06:50:56

Re: What should be the question?

#10 2005-06-10 06:54:08

Re: What should be the question?

#11 2005-06-10 09:20:21

Re: What should be the question?

#12 2005-06-11 02:34:40

Re: What should be the question?

#13 2005-06-11 04:01:28

Re: What should be the question?

#14 2005-06-12 06:31:44

Re: What should be the question?

#15 2005-06-12 06:37:33

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#16 2005-06-12 06:39:37

Re: What should be the question?

#17 2005-06-12 10:46:10

Re: What should be the question?

#18 2005-06-13 01:46:52

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#19 2005-06-13 07:07:23

Re: What should be the question?

#20 2005-06-22 08:52:46

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#21 2005-06-22 10:52:10

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#22 2005-06-23 04:41:00

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#23 2005-06-23 06:56:47

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#24 2005-06-23 23:40:47

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#25 2005-06-23 23:44:51

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