In test suite problem 25, there seems to be an issue with the question mark after 'Africa'. The word Africa itself is a prime word, but the solution marks it as non-prime. Since the question mark is usually considered punctuation, I treated it as a space.
Thanks William. I fixed the test (and my own code).
Recurring Cycle Length (Inspired by Project Euler Problem 26)
System of equations
Create a vector whose elements depend on the previous element
Rounding off numbers to n decimals
Find indices of diagonal elements
Solve an ODE: equation B
Determine whether a number is a fibodiv number
Solve an ODE: diffusion problem 2
Determine whether a number is unprimeable
List the emirps
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