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Math Worksheets: Sudoku: Sudoku: Evil Sudoku - Set 1

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<worksheet-schema-block title='Evil Sudoku - Set 1' description='Evil Sudoku - Set 1: Recent research has shown that that a valid sudoku puzzle will have at least 17 clues. The evil sudoku puzzles in this section come from Gordon Royle's list of minimal sudoku starting geometries with these challenging starting conditions.' pagetype='Worksheet' alignment='3rd Grade, 4th Grade, 5th Grade, 6th Grade, 7th Grade' agerange='8-13'>