Quick update:

Its funny how when I'm revising by myself and when I chance upon a particular question to which I don't know the answer, I'll just look at the answer sheet and accept the answer for whatever it is. But when someone else asks me how to do the same question, I'll go all out to find out the rationale behind the given answer.

2 hours on a single MCQ question. I think i've more or less covered the entire topic on Statistical Powers.