Write a function to find the 5th root of a number.
It sounds easy, but the typical functions are not allowed (see the test suite), so you'll need to find a non-standard method to solve the problem.
The Goldbach Conjecture, Part 2
give nth decimal place of pi
Doubling elements in a vector
Produce a cosine wave
Group-wise Euclidean distance
Divisible by 15
Rule of mixtures (composites) - reverse engineering
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