Trivia

Subject:
Re: Friday Puzzler -- Friends and Strangers

Larry Barrett
If I understand the puzzle correctly, I think the answer to the first question is 4.
If there are 4 people, A, B, C, D, the possible pairs are AB, AC, AD, BC, BD, CD.
If A and B are the only friends, then the other 5 pairs are strangers.
If A and B are friends, and A and C are friends, then the other 4 pairs are strangers.
If A and B are friends, A and C are friends, and B and C are friends, then there are
3 groups of friends and 3 groups of strangers.

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