I got it to not work.
I used 1740, and 4071, with a difference of 2331. I circled the 3.
Then I typed in 3312, and it picked "9". Huh?
On Fri, 21 Jan 2005 09:08:20 +0000, John Dunlop <[log in to unmask]> wrote:
> To all you smart mathematicians out there, can anyone explain to me (in
> simple terms) how this works?
>
> See : http://digicc.com/fido/
>
> I can't figure it out, especially as you can jumble up the numbers and
> it still works.
>
> Doh!
>
> Cheers,
>
> John Dunlop
>
> E-mail : [log in to unmask]
> Web : http://www.jdunlop.net
>
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