We are invited to choose which specific mathematical operations we want to practice: addition, subtraction, multiplication, division, or conversion. Next, you can customize the complexity, indicate the presence or absence of a time limit devoted to solving a chain of examples; possible game against the computer. Then follows directly, so to speak, “gameplay”, where we enter the answers. Visually, everything is arranged as if they were throwing a ball in our direction, and we beat it off if we flit our remarkable mind.