The Question Factory is a section in which you'll be able to suggest questions for the game. You'll find it at the center of the right corner of the main screen, represented by a factory icon.
In order to create a question, enter the Factory and tap on "Create". Once you do this, you'll need to choose a category for your question. After doing this, you'll need to write the question and the different answers; you'll notice that the first option will be for the correct answer, but don't worry, once you add every answer we'll mix them up.
Once you're done, tap on "Send" and your question will be processed for its approval.