multiplication

multiply across the rows:
2 x 7 x 6 etc
then add these

now multiply down the columns:
2 x 9 x 4 etc
then add these

does this work for other magic squares?










using a calculator, square the rows as 3-digit numbers and add them:
276^2 + 951^2 + 438^2

then do the same thing with the columns, reading downwards:
294^2 + 753^2 + 618^2

does this work for other magic squares?