<p>I just have a question regarding the math refresher chapters. Are we suppose to look at all the boxes and understand them? I mean at the first box (N1) in the arithemetic section. It saids: Number comes in many varieties...ok that's great, what do they want me to learn from that? Can't they at least tell me what types there are (irrational, rational, whole numbers, etc)? Are there any supplements for the refreshers or is that all?</p>