At a minimum, you should make this problem variable. For example, find the element at the ith row and jth column and define i and j in the test cases, which are passed along with the function.
select the primes of a vector
Rounding off numbers to n decimals
Sum of the Matrix Elements
Determine whether the input is divisible by 3 as well as 5
Find remainder when x is divided by 3
modulus of a number
first element of matrix
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