I appreciate your reply. My question centers more around wanting to understand how well I'm doing for the purpose of properly judging the difficulty of the question, rather than the quality of my preparation. I appreciate your articles and advice, any other information you can offer would be great.
If you want to judge how well you are doing on the difficult questions, where you need improvement, and what steps that might take to improve, then we get exceedingly little useful information about those important things simply from percentages and overall right/wrong ratios. The real learning for the GMAT happens at the detail level. For example, if there are questions for which you don't understand the explanation, or you don't feel confident that you will remember the explanation and be able to avoid the same mistake next time, these would be great individual posts on GC. If you see any patterns of mistakes, that also would be an excellent thing to discuss in a post. Make it your goal to milk every difficult question, all of them but especially the ones you got wrong, for every ounce of learning you could possibly squeeze out of them --- this may well involve posting each one on this forum (or finding where they are already posted) and reading what various experts have to say about them.
I would also recommend perusing our free blog ---- http://magoosh.com/gmat/
Some of the articles will cover basic stuff, but I believe, if you search through the whole blog, you will find several tips for handing tricky questions of all categories. Magoosh
also has solutions for all the math & SC questions posted on Youtube --- search there. http://www.youtube.com/user/MagooshGMAT
Also, here's a free DS question:http://gmat.magoosh.com/questions/984
and here's a free CR question:http://gmat.magoosh.com/questions/3117
For each one of those, after your submit your answer, the following page will have a video explanation. Each one of our 800+ GMAT questions has its own video explanation, for accelerated learning.
I hope all this helps.
Magoosh Test Prep