Description: Brain machine is a very simple mathematic game. Your goal is to get the equation right by entering the right number into the empty space from the board. The big board consists of number 1-9, once you have chosen it'll be removed from the board. The calculation can be plus, minus, times or divide and you will have to insert two different numbers to get the equation right based on the final given answered. This game is suitable for your kids to train their calculation. Although the game gets quite difficult when the number gets higher, it is a very challenging game you can play over and over again just to train your rusty brain from using calculator.