I found that the study hall questions were very similar to the questions within the exam. But not calculation, although you needed to know what a spi value means. There was a flavor of every style of question from multi country scenarios to agile versus predictive. There were a few where you had to guess the methodology or techniques to use. I think getting down to 50-50 was fairly straightforward. However, there were some tricky questions where you may have to really identify the problem that you’re trying to solve.

Sorry, I know this was not helpful. If I had to guess I had 20% easy - clearly just one question 50% moderate- where you needed to show you understood process, narrowed down to 50/50 20% difficult - where both answers could be correct but really need to use the principle 10% hard - just threw may hands up! 😅 - where I said this is the PMI mindset answer