This question was written by a perverted teacher.

I've only seen this version.

6 1 8

7 5 3

2 9 4

4*3 squares should be repeated.

The proof is too complicated for both primary school students and high school students to do, and the proposition of this question is very imprecise, neither saying that it can be repeated nor saying that it cannot be repeated. Moreover, it was clearly stated that three numbers should be filled in each line, but four grids were given. It is completely contradictory and violates the rigor of mathematics. Where did you buy such homework? Does the school advocate or not? If educators talk nonsense like them, what is the future of mathematics in China?

You can fill it out like this. Math teachers don't check too carefully because they don't advocate it either.