The 4×4 puzzle uses the numbers 1-4, the 6×6 the numbers 1-6, and so on. In each row and in each column each digit can appear only once (just like in Sudoku). Each "cage" (the blocks with the thick border) shows a result and an operation (addition: +, subtraction: -, multiplication: ×, or division: /). The operation applied to the numbers in the cage should produce the result shown. Note that for subtraction and division the order is not fixed
Grid: Enter single characters into cells, like a crossword
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