Math Quiz HD is a free puzzle game available on Android that helps players train their brain in a fun way. Based on the four basic arithmetic operations (addition, subtraction, multiplication, and division), the game is suitable for all ages over 12 and increases in difficulty with each level.

The game features six standard game modes, including addition, subtraction, multiplication, division, addition/subtraction, and a mix of all four operations. Additionally, there is a special MathPuzzle mode that challenges players with more complex math problems. The game has nice HD graphics that make it visually appealing.

The MathQuiz HD Pro version is identical to the free version, but without any advertisements. It is a nice recognition for the developer's work. Overall, Math Quiz HD is a great way to keep your brain sharp while having fun.