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.
Area of rhombus
sum of first 'n' terms
07 - Common functions and indexing 6
Square a Number
Determine whether the input is divisible by 3 as well as 5
Find the last digit
find a specific element from an matrix
modulus of a number
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