“The large 13 x 13 square is magic — that is, each row and column adds to the same sum — but so is each successive nested square, from 11 x 11 down to 3 x 3.
The magic constant of each square is 10,874 smaller than the last.
And every cell is prime.”
RIDICULOUS
(via mylifeisborromean)
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Cuadrado Mágico 13x13. Pero si te quedas con el cuadrado 3x3 central, también es mágico… y si a ese le añadimos las...
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