Add only the positive numbers of x
x = [-2 -1 0 1 2 3]
the positive numbers are: 1 2 3, so their sum is 6
Reverse the elements of an array
Find nth maximum
Product of Array
Matlab Basics II - Extract last 3 elements of a vector
Determine if input is divisible by three.
Reduce the logic
Odd times 3
Remove multiples of N
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