I think I have. I did the one that you have to go in to their offices to do - and you can't book a time, and if there are too many people for a particular session then you have to come back later. Ridiculously inconvenient for someone coming from interstate :mad1:
Anyway, it wasn't hard. If it's the one I'm talking about, they send you practice questions. The test is exactly like the practice questions. Reminded me of those UNSW maths and science competitions at school. Main thing is to pace yourself to get it done and not get bogged down in anything (e.g. if you keep making a mistake and not getting any of the multiple choice options...just move on). One thing is if you're not good at mental arithmetic, it's probably worth practicing doing some simple calculations quickly. I don't remember being really pushed for time, but I don't think I had heaps of time left over at the end either