Have You Even Been Played Such Magic Game?

I played a game named Magic Gopher by chance, it's really marvelous game that I had even been met. The first step you just think of a number with two digits, second add the two digits together, then substract the new number from your original number, at last, look at the symbol next to your number and remember. Wow, the interesting thing happened, are there anybody who can explain it?

Jun 27, 2014 2:20 PM