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.
Inner product of two vectors
Back to basics 7 - Equal NaNs
Rotate a Matrix by 90 degrees
Count up then down
Find a Pythagorean triple
Scrabble Scores - 10
Scrabble Scores - 2
Rule of mixtures (composites) - either bound
Scrabble Scores - 6
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