Learn to calculate faster as the speed of calculator to improve your maths skills in smart way, you just have to match a calculation to the number displayed on the top of blackboard. if it displays 27 then you have to choose enough color numbers that makes you operation true, like 9 + 8 +1 or 9 + 9 + 9 or 3 x 9... This game comes with several levels so that you can play a level suited to your mental math ability,lets improve your speed mental math and win a smart Brain...