Everyone, I've modified the test suite such that common cheats won't work; i.e., regexp/rep, interp1/2/3, num2str, str2num, etc. are disallowed! General numerical solutions, however, are most welcome.
Find state names that start with the letter N
Flip the main diagonal of a matrix
Sum of first n terms of a harmonic progression
Sum of odd numbers in a matrix
Volume of a Simplex
Dots in a Sphere
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