I just took the exam last week and passed. I did study for the exam using the ARCO books. I don't think I could have done as well as I did if I hadn't studied for the exam, specially with the airplanecockpit diagrams. The math really was not all that hard, but that may not be the situation for everyone. IAs long as you can do long division with decimals and also do multiplication by nah, you should be ok. There are some conceptual question in the math portion, and by that what I mean is word problems. They really are not extremely hard but they can give you trouble if you do look at it the right way. The math is basiclly 10 grade level and. But I do recommend that you study for the exam, because you want to do as well as you can. Also, you may have to review some of the mechanical comprehension stuff, since some of it can be a little tricky. The over all piont I am trying to make is that you really should study for it using the arco book. Trust me, it will help.
Good Luck.