Wait tomorrow they should be out by then.
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I thought it was fairly common knowledge but seems a touch strange that they did not tell you earlier. Typically they start yelling at people at least 15-20 minutes before exams commence.
Aptitude is probably more important then the level is.
I would suggest that you start with the lowest level of maths that is offered at the University, and seeing how you go move up to higher "harder" levels of mathematics.
Do a bridging course, it is likely to help.