Question types - manipulate mid-quiz?
I'm constructing a quizzing game with several types of questions (let's say difficulty tiers) that are being shuffled at random. I want to give users the option to include/remove different types of questions mid-quiz (via in-game menu). Keep in mind there is no requirement for a results slide, as the score is being kept via 2 (+1) variables which are displayed on the slide master: score, average, and (attempts).
Any thoughts on how to approach this technically?
Thanks in advance,