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.
Omit columns averages from a matrix
Make a random, non-repeating vector.
03 - Matrix Variables 1
length of a vector
Number Puzzle - 098
Number Puzzle - 024
Energy Conversion 1
Number Puzzle - 026
Number Puzzle - 092
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