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16 replies to this topic

#11 Morningstar

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Posted 20 December 2011 - 12:49 AM

But nowhere it is mentioned in question that the guards know which door they are guarding.


If they don't know which door they are guarding, I believe there is no way of solving it. I'm pretty sure this has been posted before.
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The cake is a lie.

#12 Arjit Saraswat

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Posted 20 December 2011 - 07:38 AM

Spoiler for solution

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#13 Mukul Verma

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Posted 20 December 2011 - 08:20 AM

Ajit, nowhere it is mentioned that the guards know about the honesty or otherwise of the other guard.
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#14 LoneWolfe

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Posted 24 December 2011 - 10:00 PM

Are you both liers.
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#15 Riddle_Lover

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Posted 02 January 2012 - 02:25 AM

[Its the old question of:
"If I asked the other guard which door leads to freedom, what would he say?"
Only need to ask one guard :)
Always take the other door.]


You said that this is the right answer but I disagree. The Rouge said 'Always take the other door' but you never mentioned the answer. It all depends on the guards answer! Otherwise you might aswell not bother asking the question. I know that that is the right aswer but I think you missed out an important fact. My answer is...

You ask: "If I were to ask the other guard if his door leads to Freedom what would his answer be?"
If the liar guards freedom and the truther guards death and you question the liar his answer would be : "Yes" (coz the truther would say no but the liar lies about this)
If the liar guards death and the truther guards freedom and you question the liar his answer would be : "No" (coz the truther would say yes but the liar lies about this)
If the liar guards freedom and the truther guards death and you question the truther his answer would be : "No" (coz the liar lies and would say no so the truther answers no)
If the liar guards death and the truther guards freedom and you question the truther his answer would be : "Yes" (coz the liar lies and would say yes so the truther answers yes).

By looking at the possible answers and senarios you can see that if the guards answers your question yes, take his door. If he answers no, take the other guards door. Knowing this you only need to ask one guard and you don't need to figure out who is who! :)
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#16 Riddle_Lover

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Posted 02 January 2012 - 02:28 AM

[Its the old question of:
"If I asked the other guard which door leads to freedom, what would he say?"
Only need to ask one guard :)
Always take the other door.]


I didn't get your solution and couldn't see how it worked but i can see now :) sorry!
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#17 ghunter32

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Posted 02 January 2012 - 10:44 AM

After brainstorming for 1 hour, finally I understand. As they say, this is the true answer to the question:

What would the other guard say if I asked him "Which one is the door to freedom?"


This is the explanation from me. Suppose there are 2 guards; Guard A and Guard B. And you ask the question to Guard A and he says "Guard B will say 1st door."


Case 1: Guard A is lying
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Then Guard B would say 2nd door (freedom).


Case 2: Guard A is telling the truth
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Then Guard B would say 1st door, which is the false door (death). Therefore 2nd door is the correct door (freedom).


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