Judging from previous years exams.... it isn't difficult at all. Just be careful with the wording of the question. They always catch people out on that.
If you're goot at maths...I'm guessing you already know all your area formulas, trigonometry ratios, geometry rules, similarity, congruency, changing decimals to fractions and vice versa, equations, etc.
Although, I seriously doubt that it'll be anything like your yearly exams.... I'm guessing "basic skills" re-runs....but for big people.
It's general knowledge. (atleast...if you payed attention in class, it is!)
But yeah, you'll be fine!
no worries and goodluck!