Yea from what I have always heard if your questions just kept getting harder and harder then you were getting all or most right, which when I went in for my test I had almost every question just seem as if it got harder and harder but they were not too hard because I reread the brady emt book 3-4 times during my class and 2 1/2 times to study between my class and national written CAT exam which was about 3 weeks of studying. It was filled with mostly cardiac, trauma, OBGYN, and a few pediatric although the kind of questions they give is very different from one person to the next. It seems like it just decides what would be harder for you based on your last answer/question even if it really is not harder for you if you STUDIED. One interesting thing I heard, not sure if it is true is that if it asks the same/almost identical question then you probably got it wrong the first time and if you keep seeing a very similar/same one then more than likely you have got it wrong yet again and it wants to give you another shot because one person from my class said they saw the same/similar one a few times throughout their test, who knows could be bs but it would not surprise me if this is really something that happens with it.