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.
Calculate square and cube of number
MATLAB Basic: rounding III
What's size of TV?
Rotate matrix by -90 degrees
Calculating selling price
Determine whether the input is divisible by 3 as well as 5
find a specific element from an matrix
Find remainder when x is divided by 3
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