Hmm.
did not feel any fatigue during the exam.
It's pretty much impossible not to feel any
mental fatigue during a 3.5 hour exam. You may not have felt physical fatigue - the adrenaline would have kept you physically energized - but if you think you didn't feel any mental fatigue, then something's not quite right. :)
Mental fatigue can manifest in the following ways:
- you read something, and then you realize you have no idea what you just read, so you have to read it again (and maybe again!)
- you start to feel impatient and just want the test to be over with; you might even speed up
- you find it harder to make decisions; you agonize back and forth between two options, even more than usual (in this case, you would actually slow down)
From what I see on the forums, the first two are more common. A lot of times, people will tell me that they thought they were getting everything right! It was super easy! Oh, and by the way, they finished 10 minutes early (but they didn't usually finish early in practice).
That last scenario is a classic recipe of mental fatigue --> speed --> careless mistakes. Could that have happened to you?
You do also mention that you rushed on the last 2-3 questions in verbal, so there were some timing issues going on somewhere, though possibly minor. It's possible that this signals some broader timing issues - another common pattern is to spend a bit too long on some hard questions and then speed up a bit on some others to make up the time, resulting in careless mistakes on easier questions.
You might be able to see this pattern if you go back through the timing data from practice tests - check out your most recent practice tests.
You also told me about your "accuracy rate" for SC, CR, and RC. The test is not scored based on an accuracy rate or percentage correct. It's not strictly necessary to understand how the scoring works, but I find that people who focus on percentage correct will often exhibit the last pattern that I described (spending a bit too long on hard questions, rushing on--and sometimes missing--easier questions). So something to think about.
(If you want to learn more about how the scoring does work, take a look at the Scoring section of our free e-book The GMAT Uncovered.)