I assume that you have already done the "main" OG homework assignments? (The ones not labeled easier or harder—so those are the more medium-level ones.)
If you are at the stage that you've already completed those, then I actually *do not* want you to just go look at the list of, say, all Algebra Inequalities problems and just crank them all out in a row. This is far
easier than what the test does (mixing everything up), and so you won't actually be pushing yourself as hard as you need to.
Instead, do mixed problem sets where you literally don't even know what you're getting from problem to problem—you have to figure it out each time...ie, exactly how the test will work, too.
For all OG except RC, the higher the question number in that chapter, the harder the problem. So the medium-level problems are literally the ones in the middle of the chapter (and the easier ones are earlier and the harder ones are later). RC doesn't follow this because the problems are grouped by passage (so you have a mix of difficulties in one passage).
You can read more about creating problem sets here:
http://www.beatthegmat.com/mba/2017/01/ ... est-part-1This takes people through how to make problem sets at different stages of study, so just read until you get to your current stage and then start doing what it says.
Take a look and let me know if you have any questions. And let me know how it goes!