This is a set of console mini-games for elementary mathematics, where in order to win you should answer correct three times in a row. The game ends, if you answer wrong.

Even
You should answer whether the number is even. A number is even if it is divisible by 2 (e.g. 2, 4, 6, 8, 10).
Answer 'yes' or 'no'.

Calculator
Solve some addition, subtraction and multiplication exercises.

GCD
GCD stands for "Greatest common divisor".
More: Greatest common divisor

Progression
Guess the missing number in sequence.

Prime
In this game you should answer whether the given number is prime.
A number is prime if it is divisible only by itself and 1 (e.g. 2, 3, 5, 7, 11).
Answer 'yes' or 'no'.