Yeah, not impressive...and I'll tell you why.

I chose 22, 2+2=4, 22-4=18. So 18 was my number. But then I chose some other ones, like 90. which gave me 81...which had the same fucking symbol as 18. Then I kept choosing, after 5 fucking tries they all had the same goddamn symbol.

Not to say there isn't a way for it to fail, but theres probably like a real high chance it will work...so its just a trick.

edit: I so wrote my post before leebstatus...