Doddy, the test suite does not check that the numbers are prime and five-digit. I recommend including assert(all(isprime(a)) && all(a > 9999 & a < 1e5)).
@ChrisR: your suggested tests have been added.
Rotate a Matrix
Determine Whether an array is empty
Create a Matrix of Zeros
Number Puzzle - 093
Number Puzzle - 089
Number Puzzles - 019
Number Puzzle - 068
Area of Cylindrical Shell
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