Re: OT How do this work?

rw wrote:
BJ Conner wrote:
Whats the trick?
http://trunks.secondfoundation.org/files/psychic.swf


It's simple. By adding the two digits and then subtracting the result, your answer is constrained to a certain set of numbers. For example, all the numbers in the range of 20 to 29 yield the result of 18. So, of the set of 100 2-digit numbers, there is a set of only 10 possible results.

9 possible. I listed them in a previous post. And there
are only 90 2-digit numbers.

--
Ken Fortenberry
.

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