by jlucero Thu Aug 01, 2013 11:10 am
The extra credit questions are written to be 600-800 level GMAT-like questions. The drill sheets are not all written to be GMAT-like. Ultimately, like everything else you use as a study tool, keep track of how long it takes for you to solve, but the only 100% GMAT-like questions you will see are those found in Official Guides.
Joe Lucero
Manhattan GMAT Instructor