I'd estimate about 3 or so... (i took it in 2011) which were verbatim from NBME forms 7, 11, and 12 (can't remember exactly which forms, but they were form those three forms)
Don't try to do NBMEs in hopes of getting the exact questions on the real thing.
Do them 1) to get an accurate representation of how well you're doing, and 2) to get good practice questions to learn concepts that are commonly tested on the boards.
Don't try to do NBMEs in hopes of getting the exact questions on the real thing.
Do them 1) to get an accurate representation of how well you're doing, and 2) to get good practice questions to learn concepts that are commonly tested on the boards.