It's time to put your thinking caps on, people. Yes, that means going into the cupboard, dusting off the dust, squeezing the cap on your head and using it. You're going to need your caps for this fun maths game. Be prepared for a soothing, brain bending experience.
The rules are not all that hard to follow, what you do is try to reduce the value of the target tiles to zero. This is achieved by moving tiles around that substract number amounts either horizontally or diagonally. You will have to think more as the game progresses, as the sequence required will become much more complex.
There are 41 one levels plus secret ones in this game. Solve them all and become the god of maths!