there is more than exercise each exercise includes the other exercises but it focuses on a specific ability firstly select the exercise and the level which you want then the program will ask you to generate a specific number by a specific calculation within a specific time when the stopwatch starts you must complete the calculation and generate the number before the time end you will have six rows each one from zero to nine and a row for the math operations in case the calculation and the result is correct the number will be added to your points otherwise the number will be discounted from your points continue the exercise and test your ability with the passage of time remember that the most important is not the percentage of your ability but how much you exercise you can select an enough time for yourself everyday for exercise and do not forget to enjoy .