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.
Getting logical indexes
Celsius to Kelvin
What number has this problem?
Length of the hypotenuse
Find out total non zero element of matrix
Determine whether the input is divisible by 3 as well as 5
find a specific element from an matrix
modulus of a number
find the mean of all elements in a matrix
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