Answer:
where each row and column sum up to 20
2 4 6 8
4 2 6 8
6 6 4 4
8 8 4 0
Explanation:
The sum of twenty using numbers 0 - 9
where each row and column sum up to 20
2 4 6 8
4 2 6 8
6 6 4 4
8 8 4 0
when you sum up each of the row or each of the column the sum = 20
given that the diagonals are not included the sum of diagonals > or < 20