Sudoku Puzzles: Hard - MathSphere

MathSphere. Sudoku. Fill in the puzzle so that every row across, every column down and every 3 by 3 box contains the numbers 1 to 9. Hard Puzzle 1. 2. 9 4. 3.

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MathSphere. Sudoku. Fill in the puzzle so that every row across, every column down and every 3 by 3 box contains the numbers 1 to 9. Hard Puzzle 1. 2. 9 4. 3.

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