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Problema mai are un adaos intersant:
Unsolved problem: Same thing, but with "perimeter" replaced by "area." For this, consider only the rows and columns (not the diagonals; such is called a "semi-magic square"). Further, allow the entries to be any real numbers, but still aim for distinct entries (or possibly the weaker condition, that the triangles be distinct).
Problema mai are un adaos intersant:
Unsolved problem: Same thing, but with "perimeter" replaced by "area." For this, consider only the rows and columns (not the diagonals; such is called a "semi-magic square"). Further, allow the entries to be any real numbers, but still aim for distinct entries (or possibly the weaker condition, that the triangles be distinct).