GE Mathdoku!

Mathdoku (also known as KenDoku, Calcudoku or KenKen) is a type of arithmetic/logic puzzle invented by Japanese math teacher Tetsuya Miyamoto. These mathematical puzzles were intended to be an instruction-free method of training the brain. GE Mathdoku is available on all your iOS devices and features:Single universal binary for iPhone/iPadUnlimited puzzles, so youll never need to buy another puzzle book (or make an in-app-purchase)Unlimited undo/redo, for ease of backtrackingAutomatic error checking/highlighting8 modes of play and GameCenter integration, so you can check how buffed your brain-cells are