Saturday, June 23, 2007

Puzzle sunday (16)

A relaxing permutation puzzle keeps nerves in a sound state. And now for a real challenge, puzzles of geometry, but in spanish. And if you like touchable puzzles, here a DNA puzzle, on a fun to be site about DNA.

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*new* item at Chez Odile is the metachat where Creatives and Thinkers meet.


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