Well OAO, the questions are pretty much basic equations, but there are like 100 of them for each day of the test. A lot of them are trick questions, or some are just a matter of misplacing a decimal, and that's how you get them wrong.
And for the record, I only got about 5 wrong, but I make it so I only fix 2 or 3 so it doesn't look like I'm cheating.
Besides, it's NOYB.