mock exams with 3 M/C answers or 4

To my knowledge, the CFA exams now have 3 M/C answers instead of 4? I have some past Schweser exams that a friend who took them a few years ago gave me and these have 4 M/C answers. Will these be helpful in studying for the CFA exam? Or will these be out of date? Thanks!

What year are they from? I can tell you how much the curriculum has changed since then.

2008 Thanks dude