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.
give nth decimal place of pi
Deleting an element in a matrix
Sum of series IV
MATLAB Basic: rounding III
Number Puzzle - 033
Number Puzzle - 024
Number Puzzle - 025
Number Puzzle - 043
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