I concur. I too am scoring > 80% in the seven prepcast exams.
While there were several questions which were straightforward, there were others that just left me scratching my head. After studying the question, I can back into their answer some of the time. Other times, not all, for example, I just posted
a sample Q from the PMI sample testa sample Q from the PMI sample test.
I found on PMI's test there is no rhythm, i.e., sometimes when you are in executing the correct answer on how to avoid the problem in the future is to create the subsidiary management plan. You apply that logic later, it doesn't work. Other times, it's do some analysis before you go cry for help, other times you cry for help immediately (and ignore analysis). One thing I think of WRT to PMI's sample is that with instant feedback, it influences how you respond to succeeding questions. One must forget the earlier questions and focus on the current (obviously), so maybe with lack of instant feedback we'll keep our head on right.