Le Monde puzzle [website]
At last, the mathematical puzzles proposed by Buser and Cohen in the weekend edition of Le Monde are available on a dedicated webpage. (The website is in French only and is associated with the math magazine Tangentes.) There is of course a one week delay between the publication of the puzzle in the journal and its publication (along with the solution) on the website. A good initiative…
Update (01/01/2016): This initiative did not last long and the puzzles have not been updated for 18 months…
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