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. ============ KEYWORDS / TAGS: math puzzles - math puzzles for adults - math puzzle books - math puzzle books for adults - math jigsaw puzzles - math puzzle logic - logic puzzles - logic puzzles for adults - logic puzzle books for teens - logic puzzle adult - logic puzzles daily - brain teasers for adults - brain teasers - brain teaser adult puzzle - brain teaser games - brain teaser office
