Sudoku
Every row, column and box needs each number once.
Free, 60 levels, no sign-up.
How to play Sudoku
Fill every empty square with a number. Each row, each column and each box must have every number once. Start with a 4 by 4, move up to a 6 by 6, then try the full 9 by 9.
Stuck? Use a hint, or turn on notes to jot down the numbers a square could be. Want to learn the methods step by step? Try our Sudoku Logic lesson.
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Each row needs 1, 2, 3 and 4
Levels
Solved!
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