Hi

I am constantly scoring in the range of 65-70% in practice tests. Few times scored less than 65 and more than 70 also but thats just 2-3 times. 

I have read Rita two times and skimmed PMBOK 4th Edition once. Additionally have given all the Rita tests, there use to score in the range of 65-75 mostly but when I try rita tests now scoring 80-85%. 

PMSTUDY Free exam - 62 % (direct simple one liners from PMBOK made me crazy)

Headfirst free exam - 72%

BrainBOK (50 Free questions) - 60% (direct simple one liners from PMBOK