27 setembro 2010

Coisas que é bom saber

To multiply 1,639,344,262,295,081,967,213,114,754,098,360,655,737,704,918,032,787 by 71, all you have to do is to place another 1 at the beginning and another 7 at the end.
– Samuel Isaac Jones, Mathematical Wrinkles, 1929; via