This is a problem where there's probably a good built-in function, but I don't know it.
this will be hard to beat !
Prime factor digits
Who knows the last digit of pi?
Is this matrix orthogonal?
Vectorizing, too easy or too hard?
Return elements unique to either input
Set a diagonal
Fair Scoring for Cody
middleAsColumn: Return all but first and last element as a column vector
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