Quiz

A-1) It's a puzzle in which you write numbers in boxes.

In a square grid, you fill in each box with a number from 1 to the number of rows and columns. The grid is divided into blocks by solid lines, and in each block a small number is written in the corner of one of the boxes. Each block must be filled in so that the result of adding, subtracting, multiplying, or dividing all the numbers in it is the number written in the corner.

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