Fill in the eight numbers 1-8 at will. The sum of the five squares is at least 5 (5 "1") and at most 40 (5 "8"), and there are 36 kinds of * *.

The square of 12x 12 has (12-2) x (12-2) =100 cross squares.

Using pigeon coop principle:

The sum of 36 is regarded as 36 drawers, and 100 cross squares are regarded as 100 apples. So 100 apples are put in 36 drawers.

100/36=2 ..........28

So there are at least 2+ 1=3 five-digit and equal "cross" figures.