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.
Convert a vector into a number
Arrange vector in ascending order
03 - Matrix Variables 3
Create an anti-identity matrix
Area of a Square
Find remainder when x is divided by 3
Determine whether the input is divisible by 3 as well as 5
find a specific element from an matrix
Calculating selling price
find the mean of all elements in a matrix
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