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I am preparing for PMP. I have gone through PMBOK, Head First and Rita once each. Now I am going thro all the three for the second time. i am scoring 80% in Headfirst questions and around 65% in Rita. But when I attempt questions from ESI guide I score only upto 50%.
Yesterday got 70% in Andy Crowe as well. Should I use the ESI guide or I am fine without it.