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X and Y (Posted on 2011-01-04) Difficulty: 3 of 5
There is an island where every inhabitant is either of Type X or Type Y. One of the types always tells the truth, and the other type always lies, but you are not sure which is which. You meet two inhabitants of this island, A and B.
A: B is of Type X.
B: We are both of Type Y.
Which type tells the truth, which type lies, and what are A and B?

See The Solution Submitted by Math Man    
Rating: 4.0000 (2 votes)

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Solution spoiler | Comment 1 of 3

A tells the truth ,being y

 B lies, being  x and telling that they both lie


  Posted by Ady TZIDON on 2011-01-04 18:41:00
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