Add only the even numbers of x
x = [1 2 3 4 5]
the positive numbers are: 2 4, so their sum is 6
Getting the indices from a matrice
Deleting an element in a matrix
Calculate the answer to life the universe and everything
Check capital letters
Connect 4 (the boardgame)
Odd times even numbers in a matrix
All odd - all even
How many complete pizzas (number 2)
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