Trivia

Subject:
Re: Question
Response To:
Correct! ()

Larry Barrett
Doesn't this depend on the fact that C has a 5? And neither A nor B knows that he has a 5. What if C has something else.
Suppose, for example, that A has a 2, B has a 4 and C has a 3. Total is 9, which satisfies the conditions (not even, not prime). I suppose you might say that C would not ask if the total was 15 in that case, but if he did and the answer was no, then it is not clear that either of the others would figure out the answer.
Another possibility is A=2, B=6, C=1; total is still 9. Another is A=2, B=4, C=9, but in this case if C asks it total is 15 he would be correct and game over.

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