There are only a certain amount of possible number that can be generated from the calculation they ask you to perform. all of the numbers that can be generated all have the same symbol. If you look at the number 0, that is the symbol that shows in the crystal ball and it is also on every number that you can calculate via the equation they give.
It had me too for a little while...
Dave
Yeah, I did a couple of numbers before I clicked it and realized all the possible answers have the same symbol. The symbol changes between clicks, just to make it believeable.
Tha pattern you're looking for is 0,9,18,27,36,45,54,63,72,81
Is that the card trick where the cards used vary between diamonds/hearts and clubs/spades, knowing full well that most people won't notice the difference in the suits?