find the first elements of a column matrix
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.
Given a 4x4 matrix, swap the two middle columns
02 - Vector Variables 5
Concatenate two strings
Find out total non zero element of matrix
UICBioE240 problem 1.16
Find the last digit
Determine whether the input is divisible by 3 as well as 5
modulus of a number
find the mean of all elements in a matrix
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