Create a variable m as a magic square with the size 6 x 6
Magic squares are defined as square matrices, where the sum of all rows and columns are equal.
(Hint: see help magic)
Replace all the numbers above or equal to 20 with zero.
Project Euler: Problem 1, Multiples of 3 and 5
Back to basics 7 - Equal NaNs
Replace May with April
Flip the main diagonal of a matrix
06 - Matrix Equations 1
03 - Matrix Variables 4
03 - Matrix Variables 6
04 - Scalar Equations 3
02 - Vector Variables 4
04 - Scalar Equations 2
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