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Friday, February 29, 2008

Two tribes one always tells true other false....

There were 2 tribes living on an island. The east tribal people always tell a lie. The west tribal people always tell the truth. Alan and Bryan came from the same tribe. However, we do not know which tribe they came from. When they were asked the marital status, Alan said: “Both of us are married.” But Bryan said: “I am not married”. Are they really married?


Ans:

Both are from same tribe. It means either both of them will lie or both will tell true. If we look at the statements both of them contradicts about Bryan's marital status. It means one of them is not telling truth, as they are from same tribe it concludes that they are from east tribe. It means Bryan is married and Alan's status is unclear.

1 comment:

  1. AnonymousMarch 9, 2012 at 1:27 PM

    Alan says that they are both married. As he is lying as well (from the same tribe) then that means that at least one of them is not married (The complement.) We know that Bryan IS married (because he is lying), so that means Alan must not be married.

    (If Alan was married, then they'd both be married and Alan would be telling the truth, so he can't be married.)

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