[SpamCop-Social] Re: Can this program read your mind?...

[Kenneth Brody]

JohnL wrote:
> 
> Chris Wright <chris.a.wright at gmail.com> wrote in news:e5ccq5$jh6$1
> @news.spamcop.net:
> 
> > JohnL wrote:
> >> Or is there a simple explanation?
> >>
> >> http://trunks.secondfoundation.org/files/psychic.swf
> >>
> >> (and no, it's not one of those that FLASHES and makes loud noises)
> >
> > I posted the answer to that one a few months back on my blog. (I've
> > deleted the answer now to let you lot work out how its done).
> >
> > Its quite simple when you find it.
> > Look for the pattern, then the maths jumps out at you.
> >
> 
> I know it's probably simple, but my mind seems to be even simpler today.
> ;-)

"Two digit number minus the sum of it's digits."

In other words:
    The 2-digit number "XY" is 10*X+Y.
    Subtract X+Y and you get 9*X.

The only possible answers are 9, 18, 27, ..., 81.  All nine of these have
the same symbol.  (Well, zero is possible as well, if you consider numbers
like "05" a "2-digit number".)

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| Kenneth J. Brody        | www.hvcomputer.com |                             |
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