Add only the odd numbers of x
x = [1 2 3 4 5]
the positive numbers are: 1 3 5, so their sum is 9
Swap the first and last columns
given 3 sides, find area of this triangle
pressure to dB?
Getting logical indexes
Odd times even numbers in a matrix
Connect 4 (the boardgame)
Reduce the logic
Add the even numbers
Odd times 3
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