BrainBashers Hard 4 x 4 CalcuDoku Puzzle - April 21

Copyright © Kevin Stone

• Complete the grid such that every row and column contains the digits 1 to the size of the grid.
• Each row and column contains each digit only once.
• A cage clue tells you the answer after the cage values have undergone the specified mathematical operation.
• The clue doesn't tell you which way around the digits occur, just the answer to the calculation.
• A digit can appear more than once in a cage.

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