Good point. I believe that once the exams are approaching, the time for study should have really been over ages ago, and you should just be doing some calm revision in order to build confidence and exam strategies.
Re: Maths Competition
I hate multiple choice. In English every choice may be seen as correct based on your own individual subjective perspective of the text.
If you enjoy it you should consider doing it. Even if you're contemplating, you should certainly do it. You have nothing to lose and everything to gain.
Did you try the resources section? Well anyway, it's better to create your own notes by using the syllabus dot points as reference. Obviously as your exams are soon this is probably too late.