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.
Roll the Dice!
Remove the two elements next to NaN value
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Product of Array
Given a square and a circle, please decide whether the square covers more area.
Find remainder when x is divided by 3
multiply an array by its position number
Calculating selling price
Find the last digit
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