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Every time you click try again, the symbols change to each of the letters. It calculates the numbers that are possible to subtract and get, and then it always shows that symbol in the crystal ball.
Yep, thats how it does it, I just tried it. Think of any two digit number, follow the directions, and I would bet money that every number you can think of when you are done subtracting will have the same symbol next to it.
math works.
10-1= 9
11-2= 9
12-3=9
and so on and so forth
and every nine didgets its the same symbol so i guess when it's wrong you cant do math ...i feel dumb