Solve arithmetical problems and finish running 42km. You can study the arithmetic with game feeling. Features - From a child to an adult, you can play with three kinds of difficulty - Choose play time by four kinds of courses from 2km to 42km - In GooglePlayGames support, you can compete with friends and player all over the world* How to playInput the answer of the numerical calculation displayed on a screen with a number button.If the right answer is inputted, the following problem will be displayed automatically. Solve a problem continuously, and finish running course. * Select difficulty and courseSelect difficulty and course, you can play a stage that suits you.* RecordsYour play record remains, you can see your records at any time.* GooglePlayGamesYou can compete with friends and player all over the world, and get the achievements.Keywordsaddition subtraction calc mental study learn math mathematics practice competition children adult game Brain Training