PLEASE READ! If you are looking to play the game Pets Inc, you have the right link! Unfortunately, the question generator has a few flaws. And no, there is not an answer key. It would be impossible to do because it generates random patterns of numbers. Press one of the four green buttons once you have figured out the LCD. To get a new problem though, press space. (If the number freezes at three, press space again!) Have fun and no cheating! It's just a game!
Thanks for playing! :)