In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a sub-region. The goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once. ============ math puzzles - math puzzles for adults - math puzzle books - math puzzle books for adults - math jigsaw puzzles - math puzzle logic - logic puzzles...
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