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SoLiDUS · 10-12-2005, 10:12 PM

The switches are simply binary bits you can switch on or off to add or substract until a desired value is reached. But it's always ((2^n) - 1). The keypad is a magic square... all columns and rows amount to the same value.

	(#19)
SoLiDUS is Offline Senior Member Posts: 5,158 Join Date: Jan 2002 Location: Gatineau, Qc, Canada	10-12-2005, 10:12 PM The switches are simply binary bits you can switch on or off to add or substract until a desired value is reached. But it's always ((2^n) - 1). The keypad is a magic square... all columns and rows amount to the same value.