#1  
Old 03-29-2005, 02:51 AM
Boppy Boppy is offline
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Magic Trick: how?

This link was sent to me recently and I fell for it. How does it work?

http://www.magictricks.co.uk/mindreader/MagicTricksMR

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  #2  
Old 03-29-2005, 03:01 AM
Ponster Ponster is offline
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Answer

Quote:
Within each group of ten numbers (the teens, twenties, etc.), subtracting the sum of the two digits produces the same number: a multiple of 9. All the teens map into 9, all the twenties map into 18, all the thirties map into 27, etc. All these numbers are the same symbol; all the other symbols are scattered randomly to confuse the pattern.

This example is especially good on the internet, because the pattern can be re-arranged between trials. A different symbol each time is then used for each iteration.
  #3  
Old 03-29-2005, 03:05 AM
Fromage A Trois Fromage A Trois is offline
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There's only a limited number of answers - any number in the twenties will return '18', anything in the thirties '27' etc. You'll notice there's also only a limited number of symbols and - surprise! - all the numbers that are a valid solution have the same symbol (although it changes each time you try).

Drat, on preview, I see Ponster got there first.
  #4  
Old 03-29-2005, 03:21 AM
Boppy Boppy is offline
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Thanks, Bras and Ponster. Now I can sleep easy.
Cheers,
B
  #5  
Old 03-29-2005, 04:01 AM
Ponster Ponster is offline
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The sneaky bit is that the image with the symbols changes each time that you play !
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