Hey New_self,
I just went to your sight. I was intrigued for awhile but the trick is this. Each 10 number group when added together and then subtracted from the origional number will always equal the same number. For example: any number in the 90's when added together and subtracted from the origional number will always equal 81. For the 80's it will always be 72 and for the 60's it will always equal 63. They change the symbols beside those numbers each time you play the game. Therefore a different symbol will always come up. However, for the session you are playing each key number in the decade has the same symbol along side of it. For example: if 63 has the libra sign next to it, so will 72 and 81 and the rest of the key numbers.
Look again, it's clever but simple.
God bless,
John1one