The Brain Games is a set of five console games. In each of them, the user is asked to answer a question. The game ends when the user gives three correct answers or when he makes a mistake.
brain-evenAnswer "yes" if the number is even, otherwise answer "no"
brain-calcWhat is the result of the expression?
brain-gcdFind the greatest common divisor of given numbers.
brain-progressionWhat number is missing in the progression?
brain-primeAnswer "yes" if given number is prime. Otherwise answer "no".
