This blog has a really interesting assortment of articles on mathematics and programming. You can use the tags to your right to find topics that interest you, or you may want to have a look at

- the problems I wrote to get your brain working;
- some twitter proofs of mathematical facts.

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You are on vacation and must find the most efficient way to cross all bridges. How will you do that?

Syncro is a beautiful game where you have to unite all the petals in a single flower. In how many moves can you do it?