I can't give too much advice about QR because that was my worst section on the DAT (16) but RC was my best (25) so I'll try and help with that. I studied for the reading comprehension section my doing a lot of practice exams for that section (I used Bootcamp). I also tried to read articles that are similar to the reading on the DAT to improve reading speed there are websites out there dedicated to this if you just look it up you can probably find some. On the test itself I read the passage highlighting anything I thought was important then went and answered the questions in order going back if I was unsure of an answer but most I retained from memory from reading the passages. The test's passages were MUCH shorter than what I had on any of my bootcamp practice exams. Good Luck!!