The following is a supermagic square taken from an engraving called Melancholia by Dürer....

The following is a supermagic square taken from an engraving called Melancholia by Dürer. Notice 1514 in the bottom row, the year the engraving was made.

a. Find the sum of each row, the sum of each column, and the sum of each diagonal.

b. Find the sum of the four numbers in the center.

c. Find the sum of the four numbers in each corner.

d. Add 11 to each number in the square. Is the square still a magic square?

e. Subtract 11 from each number in the square. Is the square still a magic square?