i don't think any of the practice materials closely relate to the QR on the real DAT. in my opinion, it was much harder than any of the practice problems/sections i'd done. i would just suggest doing all the ones you know how to do, and going back to the harder ones/guessing on the ones you don't have time to work out. good luck man...just get really comfortable with the concepts, and hopefully you'll be fine.
-waystinthyme