++ [ originally posted by Majed ] ++
Not only is this Mystical Ball "figure-out-able" in a couple of minutes, but there's already been a thread about this.

So goddamn obvious seriously. Its just basic mathematics.

If you choose lets say 29, it will be 2 plus 9, which equals eleven, minus that from the original total and you will always have a number remaining which is a multiple of nine, for any number.