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8 replies to this topic

#1 wiserajendra

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Posted 07 March 2008 - 03:19 AM

There are three people A,B and C from one amazing island. One of them always speaks the truth, one of them always lie and one lies one day but speaks truth the other day. There is one more problem, they can't speak english (but they can understand) and so far we have known that "Da" and "Ja" in their language means YES and NO in some order.
By asking them only three questions how can you determine their identity?
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#2 redshift

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Posted 07 March 2008 - 06:40 AM

There are three people A,B and C from one amazing island. One of them always speaks the truth, one of them always lie and one lies one day but speaks truth the other day. There is one more problem, they can't speak english (but they can understand) and so far we have known that "Da" and "Ja" in their language means YES and NO in some order.
By asking them only three questions how can you determine their identity?


If you ask all three the same question does that count as one question or three?
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#3 bonanova

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Posted 07 March 2008 - 09:02 AM

Spoiler for Near-miss for a solution ...
Edit: This spoiler assumes Da means Yes.
Re-reading OP, I can't assume that.

Now I'm wondering whether we can ask each of them 3 questions.
But that would be too easy.

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#4 wiserajendra

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Posted 08 March 2008 - 09:12 AM

Clarifications for the question.
1.You are strictly allowed to ask only 3 questions.
(no matter, you ask all 3 to same person or one to each OR Ask same question to 3 different person
i.e. Each Yes/No reply counts as one question)

Hint: You must ask Yes/No question since you can understand reply only in Yes/No format.
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#5 unreality

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Posted 09 March 2008 - 03:04 AM

Does "Da" mean Yes and "Ja" mean No? Or does "Da" mean No and "Ja" mean Yes? Or is it unknown which of those two cases it is?
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#6 bonanova

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Posted 09 March 2008 - 01:42 PM

Does "Da" mean Yes and "Ja" mean No? Or does "Da" mean No and "Ja" mean Yes? Or is it unknown which of those two cases it is?

I think the OP implies we don't know. "in some order"
This is either a difficult or an impossible riddle.
Spoiler for Which means we probably have to
Edited to put my speculation into a spoiler.
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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#7 bonanova

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Posted 11 March 2008 - 06:32 AM

Spoiler for How to get around not knowing the meaning of Da and Ja
Which means post #3 is now back to being a near-miss.
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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#8 wiserajendra

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Posted 11 March 2008 - 10:43 AM

Here is a clarification and a hint.
We don't know whether "Da" or "ja" means YES and oviously whether "Da" means NO or "ja" means NO


Hint:
You can ask questions containing the words "Da" or "Ja"
for eg. "Do you say "da" if i ask you does sun rise in the east"
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#9 bonanova

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Posted 11 March 2008 - 01:52 PM

Thanks wise_rajendra, this was a great puzzle. [I'm curious whether you read post #7]
Here's one for you.
Spoiler for Here's one solution.

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell




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