The test suite does not check that the solution is a character string, but the problem definition requires that it should.
Added this check. (I messed it up a bit the first time I tried to do it, so sorry for some interim weirdness.)
str = num2str(A,formatSpec), could replace '
Invalid solution, really
New test suite invalidates this solution.
Which values occur exactly three times?
Back to basics 22 - Rotate a matrix
Return elements unique to either input
multiply by three
Factorize THIS, buddy
Increment a number, given its digits
Figurate number triangle
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