Test your mental calculation skills. How long can you go? How high can you score. Can you find tricks to answer the questions without calculating the every whole equations? - Randomly generated questions so you rarely get the same challenges. - Help improve your arithmetic, math, and counting skills while having fun in a game setup. - Included: addition, subtraction, multiplication and division questions. - Challenge friends and/or compare scores with players from all over the world in the global leaderboard. - Elegant modern, simple but to the point flat interface.