Invent a 3 by 3 magic matrix M3 with entries 1,2, ... ,9. All rows and columns and
Chapter 2, Problem 31(choose chapter or problem)
Invent a 3 by 3 magic matrix M3 with entries 1,2, ... ,9. All rows and columns and diagonals add to 15. The first row could be 8,3,4. What is M3 times (1,1, I)? What is M4 times (1, 1, 1. 1) if a 4 by 4 magic matrix has entries 1, ... , 16?
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