I really can't quantify it, and frankly, I won't at this point, for people who haven't even entered OT school. It's a high-stakes test and it's timed, so for some people, those are challenging by their very nature, but unlike most high-stakes tests, it actually tests knowledge of content, though it does have the element of learning to pass the test itself. However, the way the test works is that there are several versions circulating at any one time, so your questions might be different than someone else's. There is also no way that you will know all of the answers to all of the questions, or even know much about the topic of the questions (I had a series of 3 related questions about a topic we never discussed in school and I only read about in passing), but the point is to use your clinical reason (which you will learn to do in school) to find the correct answer. You also only need to obtain a certain score to pass - and NO ONE, I repeat, NO ONE cares about your score as long as it's a passing one. Not your potential employers, and not the state medical board who will issue your license. This is not the GRE or the SAT.