How do we see Mock Exams? Do we need to take as many mock exams as possible and go through every question in detail with explanation?
Will this help for the exam?

Please suggest as I have prepared completely and now started taking mock exams but I see some variance in my scoring i.e., 66%, 78%, 78%, 70%, 71%, 79%, 71%.

I am confused about what is wrong with my preparation and why am I not able to move above 80%. Any guidance?