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
Swap the input arguments
Create a square matrix of multiples
Generate a NaN...on purpose
Find a Pythagorean triple
What's size of TV?
Add the odd numbers
Connect 4 (the boardgame)
Reduce the logic
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