$ pip3 install --user --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple alexofechoes_brain_games
Answer "yes" if number even otherwise answer "no".
$ brain-even
What is the result of the expression?
$ brain-calc
Find the greatest common divisor of given numbers.
$ brain-gcd
What number is missing in the progression?
$ brain-progression
Answer "yes" if given number is prime. Otherwise answer "no".
$ brain-prime
