Hello, I am scheduled to take my CEN on October 22nd, 2016. I have been studying since August. I have two review books with practice exams and practice question booklets separated by system. One of the review books is the one currently available through the ENA. I have taken 2 practice tests (each test has 150 questions) from each book and the highest score I have got to this point is 72% 😕 I am very discouraged. I have heard, however, that the practice exams are harder then the actual test and that if you are getting around a 70% on the practice tests then you should be fine for the actual exam. Does anyone know if this is true? Any advice would be appreciated. Thank You! Ashley