There's a lot of questions from pre-algebra, trig and calc 1. Remember that you have less than a minute to answer each question--so the questions cannot be too difficult...
Yeah... some of those questions definitely take longer than a minute to figure out, and I consider myself pretty good at math. I wouldn't assume that just because there's a time limit that they're gonna go easy on you.
From what I remember, it was a lot like high school calculus, or calc 1 in university. It isn't too in depth. The hard part is working fast enough and managing your time.