.... "If the brain was so simple that we could understand it, then we would be so simple that we couldn't." -- Emerson M. Pugh


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Saturday, October 18, 2008

Number Magic

Taken verbatim from an old post at "futilitycloset":

Choose four distinct digits and arrange them into the largest and smallest numbers possible (e.g., 9751 and 1579). Subtract the smaller from the larger to produce a new number (9751 - 1579 = 8172) and repeat the operation.

Within seven iterations you'll always arrive at 6174. With three-digit numbers you'll always arrive at 495.

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