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Mind reading: how do they do it?

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kriskwery | 09:57 Sat 26th Apr 2003 | How it Works
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Take a look at this site: http://mr-31238.mr.valuehost.co.uk/assets/Flash/ps
ychic.swf It seems to work! But how?? It's really bugging me.
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Avatar Image geofbob
Simple! If you add together the digits in a two digit number, and subtract the sum from the original number, then the answer must be a multiple of 9. (10X + Y - (X + Y) = 9Y) So all the website compiler has to do is provide the same symbol for all multiples of 9.
12:33 Sat 26th Apr 2003
Avatar Image geofbob
A clever elaboration is that each time you enter the chart, the symbols for the multiples of 9 change; but you will note that they are all the same up to an including 81.
12:44 Sat 26th Apr 2003
Avatar Image NickleArse
Which came first, that one or that mystical ball thing?
14:29 Mon 28th Apr 2003

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Mind reading: how do they do it?

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