This is a command line utility that suggests to user to play one of five mini-games. Every game contains three questions. When user answers all these questions right, he wins. Otherway, if he makes a mistake, he loses the game.
The game shows to user random integer numbers. User must answer "yes" if this number is even and "no" if it is odd.
https://asciinema.org/a/BuG3i0K5NzcuDQTXKNsii42oJ
This is the game that suggests to user to solve mathematical problems. There are only three type of question: addition, subtaction and multiplication.
https://asciinema.org/a/V47r5BGE8sXS0ooIXwrvO1V2E
The user is shown a pair of numbers. He must find the greatest common divisor of these numbers.
https://asciinema.org/a/tAs5d0q0TJo1Y8vEx6l6fQUB9
The game shows series of numbers forming an arithmetic progression. One of the numbers is missing. User must to guess, what is this number.
https://asciinema.org/a/RjweDegiTUyDzVR37CwT4BpQ3
The user can see a random number. He must answer is the number prime.