Our compilation of Free Online Sudoku Games available on the Internet. Play word games that teach, build or strengthen your word skills and concepts while having fun. We categorise and review the games listed here to help you find the games you are looking for.

Play Sudoku puzzles with three levels of difficulty.

To place a number, click in a square to select it, then type the number on the keyboard. To erase a number, click to select a square and then press Backspace.

Right-click in a square and then type a number to add or remove the
number as a pencil mark, indicating numbers that you think
*might* go in that square.

When you master the basic game, try Jigsaw mode (irregularly shaped blocks), X mode (the two main diagonals of the grid must also contain every number once), Killer mode (instead of single-cell clues you are given regions of the grid each of which must add up to a given total, again without reusing any digits), or all of those at once!

Courtesy of Simon Tatham's Puzzle Collection.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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