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.
Factorize THIS, buddy
Convert a vector into a number
Beginner's Problem - Squaring
find the mean of all elements in a matrix
Calculating selling price
modulus of a number
Determine whether the input is divisible by 3 as well as 5
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