math
posted by Mark .
justify that15 is the sum of eachrow of a 3X3 magic square using the number 09. Find the sume of all the numbers. What is the of eachrow in a 4X4 magic square that uses the numbers 116.
 math  bobpursley

math 
Reiny
When you study the link given by bobpursely, make a note of
Albrecht DÃ¼rer's magic square, probably the most famous 4by4 magic square.
I especially like how, in the last row, he was able to insert the date of his "Melancolia" engraving as
1 15 14 4 to stand for 1514 AD
A being the first letter of the alphabet and D being the 4th letter, with 1514 the year
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