Math Quiz HD (free version) 'Math Quiz HD' based on the four basic arithmetic addition, subtraction, multiplication and division, and helps you to train your brain in a funny way. It is suitable for all ages over 12. The degree of difficulty increases with each level. Main features are: • 6 "standard game modes" (addition, subtraction, multiplication, division, addition/subtraction and "mix" with all four basic arithmetic • special MathPuzzle-Mode • suitable for all ages from 12 • nice HD graphic • Tab support • supports Android 11 • … The "MathQuiz HD Pro" version is identical to this version, however, contains no advertising and is a little recognition for my work.