Robert -
There's a reasonably good discussion of this here:
http://mathforum.org/library/drmath/view/58518.html
Thanks . . .
tom
On Oct 8, 2012, at 9:20 AM, Robert J. Cordingley <rob...@cirrillian.com> wrote:
> I probably should know this...
>
> So when you rearrange the digits of a number (>9) and take the difference, it
> is divisible by nine. A result that sometimes points to accounting errors.
> If the numbers are not base 10 the result is divisible by (base-1).
>
> What is the associated theorem for this?
>
> Thanks
> Robert
>
>
>
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