Hi there, I don't know the number of right questions to passs the test. Here, at Spain I needed a 849 over 1000 top. I had 1 hour and 20 minutes to do it, and only 65 questions.
What I used to study was the books from my cnap course and the exam kit for the ccna (cisco press).
My only advice is to read the question carefully, and read all the answers before choosing one. By the way, gotta tell that they usually tell you the number of answers you gotta pick.
And be sure to read all the exhibits from the questions that have them.
And good luck
I studied only 1 week, but had 1 year of cnap course, so I guess that helped a little.
Carmelo Lopez