Check it out:
http://milaadesign.com/wizardy.html
Choose a two digit number, add them together, subtract that from your original number, then look at that number on the screen. The game then tells you which symbol you're looking at.
Pretty impressive, it got me four out of five tries.
That is simple. Every 2 digit number you try, the result would be a multiply of 9. So, all multiplies of 9 have the same symbol and the symbol changes every time you start over.
ReplyDelete9-18-27-36-45-54-63-72-81 all have the same symbol.
You must have mistaken the subtraction that one time which it wasn't the right symbol.