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Recreational mathematics or puzzles with serious mathematical content. Note that math contest problems are generally considered off-topic.

35 votes
1 answer
3k views

"The Two Sheriffs" puzzle

This puzzle is taken from the book Mathematical puzzles: a connoisseur's collection by P. Winkler. … But the question is why this puzzle is unsolvable for seven suspects? Original problem was discussed at Puzzling. There are some solutions here. EDT. …
Alexey Ustinov's user avatar