01-22-2008, 11:54 AM
The answer is always a multiple of 9 and all multiples of 9 have the same symbol. The symbol associated with multiples of 9 changes from run to run run, so you're less likely to notice the trick.
It's not magic at all, it's algebra...
... of course, to some, algebra might as well be...
... oh, never mind!
ArtM
It's not magic at all, it's algebra...
... of course, to some, algebra might as well be...
... oh, never mind!
ArtM