by RonPurewal Fri Mar 06, 2015 2:21 pm
also—it's not the greatest idea to use problems that have been purged from older editions of the OG (especially OG10, which is over twelve years old). those problems were not removed at random; most of them were removed because, in some way or another, they didn't meet the standards for this exam.
the 10th edition SC problems test lots of things that are no longer tested at all. so, studying SC from the 10th edition is, is a certain sense, like studying for the wrong test.
always stick with the most recent editions of OG and GMAT Prep.