This would be better as "find the nth element of an array." Also, a column matrix doesn't exist. Perhaps you meant column vector, though the variables in your test cases are row vectors.
First N Perfect Squares
Flip the main diagonal of a matrix
07 - Common functions and indexing 3
Find out magnitude of vector
Rotate Matrix @180 degree
find the mean of all elements in a matrix
find a specific element from an matrix
Find remainder when x is divided by 3
modulus of a number
Find the last digit
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