This is a fun number game with three levels. In the first level, two numbers are randomly given as the starting number. The player then randomly adds numbers to the starting number. If the number reaches 21, the game is successful. If the number exceeds 21, the game fails. The second level tests mental arithmetic ability. A random set of numbers is given, and the player mentally calculates the sum of all the numbers. There are three answers, only one of which is correct. There is only one chance to choose. If you choose the wrong answer, the game fails. The third level is a 9-square Sudoku. The number in the lower right corner = (the number in the upper left corner + the number in the center) ÷ the remainder of 3 + 1. No numbers can be repeated in each row. There are three levels in total, allowing you to experience the charm of different numbers.
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