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.
surface of a spherical planet
Project Euler: Problem 1, Multiples of 3 and 5
Getting the indices from a vector
Set the array elements whose value is 13 to 0
Number Puzzle - 109
Number Puzzles - 002
Number Puzzle - 079
Number Puzzle - 118
Number Puzzle - 058
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