Dang, these are pretty clever. 2 and 4 got me for awhile, I am stuck on 7 though.
Very nice game
I can't do level 7 at all I put in answers like 14 but sadly it didn't work.
If someone knows then you can email me the answer as I would like to get to the next level.
How many levels are their?
To all the people who is stuck on level 7: I can tell you that you need some kind of math-symbol to understand it.
It´s a nice puzzlegame. I´m stuck on level 7.