What are some fun math mind training games to recommend?

1. Sudoku: Sudoku is a logical reasoning game in which all the spaces in a 9x9 grid are filled by filling in the numbers. This game improves logical thinking and math skills.

2. Hwa Rong Do: Hwa Rong Do is an ancient mind game in which you move squares to put specific shapes together. This game improves spatial thinking and strategic planning skills.

3. Rubik's Cube: Rubik's Cube is a three-dimensional puzzle that requires you to rotate the colors of the individual faces in order to reduce them to a cube of uniform color. This game improves spatial thinking, hand-eye coordination and problem solving skills.

4. 20 Problems: This is a simple but fun math game that requires the player to answer as many questions as possible within the allotted time. The questions involve various math concepts such as geometry, algebra, probability, etc.

5. Number Hwa Yung Do: Similar to the traditional Hwa Yung Do, but using numbers instead of squares. Players need to move the numbers to reach a specific goal. This game can help improve number sensitivity and logical thinking skills.

6. Counting Lines: Draw lines on a grid so that the sum of the numbers on each line is equal. This game hones numeracy and strategic planning skills.

7. Arithmetic Maze: Place numbers in a maze and ask the player to move the numbers to reach a specific goal. This game improves numeracy and spatial thinking skills.

8. Math Contests: Participating in math contests exercises problem-solving skills, logical thinking and a sense of competition. Examples include the International Mathematical Olympiad (IMO) and the American Mathematical Competition (AMC).

9. Online math games: There are many websites that offer online math games, such as MathPlayground, KhanAcademy, and others. These games cover a variety of math topics and can be chosen according to personal interests.

10. Mathematical modeling: Participating in mathematical modeling competitions or projects, such as the Mathematical Modeling Competition for American College Students (MCM/ICM), can improve the ability to solve real-world problems, the ability to work in a team, and the ability to innovate.