Texas Instruments BA II Plus Financial Calculator--for cfa

Press [2ND] -> [.] (you will see FORMAT over the button [.])

Then you will see DEC = 9

Press 5 (so as to set 5 decimal place)

Press [ENTER] -> DONE.

I havent seen any offical CFA past paper available so far. The syllabus of CFA changes every year. The sample exams from Schweser 's a good source to prepare the exam. If you could score >70% in Schweser sample exams, you will have a very good chance to pass.

Good luck~