It's a mathematical math maths game thing! Yayyyyyy!
The rules are simple:
1. Connect tiles so that the their sums match one of the goal values (e.g. 4 = 2 + 2, 7 = 9 - 2).
2. Round tiles can be used more then once.
3. Some levels also require that all cells in the grid must be filled.
It's going to be challenging... ur ability to add and substract will be tested to its absolute limits. Ur brain will be working over time.
U had better remember to stretch that brain of urs before starting, otherwise u may end up pulling something, or hemorrhaging something, or even worse, turning into a zombie, or worse still, becoming an accountant.
