Difficult Sudoku Group Puzzle | ||
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| Permission is granted to teachers in grades K-12 to print and photocopy these puzzles for use in their classes. Permission is also granted for parents and individuals to print for educational and personal developement. Please share this link with friends on social media and email so they can practice as well. | ||
Place each element of the group (1 2 3 4 5 6 7 8 9) exactly once in each row, each column, and each 3x3 square.