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Every box will contain a number; numbers depend on the size of the grid. For a 6x6 puzzle, use Nos. 1- 6. Do not repeat a number in any row or column. The numbers in each heavily outlined set of squares must combine to produce the target number found in the top left corner of the cage using the mathematical operation indicated. A number can be repeated within a cage as long as it is not in the same row or column.