Hi there,
There are a total of 8 exams in the prep cast and I took about 5. I’d say take at least 5-6 exams during the week of your exam. Do not take practice exams on the day before you sit for the PMP. Take that day to relax and just fix gaps in knowledge. My exam was on Feb 29. I took practice tests between Feb 22-27. After every test I would go over the incorrect questions to understand what went wrong. And would note the terms that I need to understand better. That way I made a list of terms and topics that I needed to focus more. Between Feb 27 and 28, I studied those topics in the list. That’s all!