If you have “All” chosen under “Question Type” the quiz generator will create a quiz with true/false, multiple choice and fill-in-the-blank questions. For a card to be able to convert to a fill-in-the-blank quiz it has to have a front and a back and the back has to have 50 characters or fewer. If you want to create a quiz that is all "Type the Answer" or fill-in-the-blank, all of the cards will have to have 50 or fewer characters on the back.