Sudoku is a logic-based number-placement puzzle. The objective is to fill a 9×9 grid so that each column, each row, and each of the nine 3×3 boxes (also called blocks or regions) contains the digits from 1 to 9 only one time each. The puzzle setter provides a partially completed grid.
Here you can find out if your memory and your brains are trained and fit enough. There are different ways to do it: interactive games to test your skills and logic, memory tests with different subjects, quizzes and riddles. But it is not only for fun, many of the tests on this page you can successfully use as the preparation for other, more serious challenges. For example, for the IQ-test or any assessment while looking for a job or striving to get a promotion. But even if it is not the case, we encourage you to test your memory and thinking skills just for your own self-esteem and development.