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

26 votes
2 answers
1k views

Has there been any new development on the Freudenthal Problem?

Equivalently, if Polly was told the number $p$, then the first two lines of the puzzle are satisfiable. … This corresponds to a solution to the puzzle. Other claims I will make about the behavior of $F(s)$ are just conjectures. …