Select every other element of a vector
Is it an Armstrong number?
Create an n-by-n null matrix and fill with ones certain positions
Find out total non zero element of matrix
Triangle Numbers (★★)
Average of corner elements of a matrix (★★)
Longest run of consecutive numbers (★★★★★)
PEMDAS test (★★)
Create a vector with n repeated values of a number x (★★)
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