Given:
Given three puzzles.
Required: Fill the missing columns
Explanation:
Consider the first puzzle. Since the sum of the first column is 0, each row, column and diagonal adds
There is only one entry missing in both first and third rows. Since the sum of rows adds up to 0, the missing entry in the first row must be -4 and in the second row must be -3.
In the second and third column, one entry is missing on each. Since the column adds up to 0, the missing entry in the second column must be 0 and in the third column must be 2.
Similarly, complete the other two puzzles.