Allowing user to miss a question in a quiz?

Hi Jeanette

Many thanks again! Yes this works well and I can make it work fine now for T/F, Multiple choice, numeric/text entry and drag&drop, thank you! ......But the question type I'd started out trying to do something with was a sequence drag and drop question - .... any clues on how to check if the answer was incorrect on that type of question? 

Also would there be any reason why any of this wouldn't work on questions in a question draw from a question bank? When I've done new trial Qs it all works fine, but within the original Qs which were imported from Quizmaker it doesn't seem to like it. I'm guessing something has got messed up with reformatting or whatever and probably I just need to go through it all methodically.