This free app for fans of intelligent entertainment will help master the method and fix the received skills of mental arithmetic. Fans of Mathematics will really appreciate it. Mode "Game" - makes techniques learning easy and fun, and on-line ranking allow to compete in mental abilities with the world. The method is equally well suited for both children (to use it enough to know the multiplication table up to 5) and adults. Mental calculation, working with numbers - a great exercise for your brain. Exercise (play game) once a day and your brain will always be in good form!