I'm writing a quiz for AA, and thinking of making it more interesting, so some of it is made up (as in the overall story/theme, not facts or answers or anything like that). A whole explanation of this made up system is required, but really only at the end. For instance, all the questions use a format that relates to this made up system, but the system is irrelevant to all the actual questions, but the last question would need a whole explanation. So, do I put the explanation at the beginning in the first question, so people can understand the first nine questions, or keep them wondering until it's explained at the end?