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.
Remove the air bubbles
Project Euler: Problem 10, Sum of Primes
Calculate the area of a triangle between three points
Calculate Inner Product
Draw a '9' in a zero matrix!
Polygon in a unit circle
Number Puzzle - 106
Number Puzzle - 090
Number Puzzle - 089
Number Puzzle - 109
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