A tip from an old quizzmaker. It is the best for you and players who want to take all of these quizzes, to submit them one per week maybe. I like the idea and I would like to take them all, but I will take three or four and I will become tiered of them for now. In next few days I will forget about them and for sure I will not see them because of the new quizzes. If you want to create a series of quizzes, this is the best way to keep attention of people and many of them will take them more than once.
Thank you for the feedback, it is much appreciated and I have taken on board what you say. Normally I make one quiz and then submit it, but thought I'd do the series together this time. You make an excellent and valid point about newer quizzes covering some of these. Once again Thanks !