NinaAnn, it's too bad that you took it on so little sleep. I wonder how you would have done, particularly on verbal, had you been more rested.
To get that verbal score to go up, go beyond SC to getting a little more familiar with CR and RC. For one thing, just by reading this chapter,
https://www.powerscore.com/newmedia/GMAT ... pter-2.pdf, you can become much clearer regarding what is going on in CR questions. If you are not going to prepare much, probably you should not start learning about CR strategies etc., because they can be distracting and there can be a whole process of picking which to use and maybe even deciding to not use them after all. Still, that one chapter on basics is full of good information. By the way, if nothing else, be clear for both CR and RC regarding what is meant by
inference and
infer on the GMAT. That topic is discussed in that chapter.
To get clearer on SC, you could read this and do the exercises. By doing that you will get a clearer picture of how placement of modifiers and words in general affects things. That clarity alone could make a significant difference.
https://owlet.letu.edu/grammarlinks/modi ... ier2d.html
For the essay section, there are templates. You can look them up. Probably you should write a five paragraph essay that includes an introductory paragraph, three topical support paragraphs and some kind of concession/conclusion paragraph. Just look for GMAT essay templates, pick one, and get a sense of how to plug into it, and you will be pretty much set to write the essay.
For quant, do what you said and also do a bunch of practice questions. Probably the DS questions gave you trouble. You could get questions by searching online for the types you want to work on, by buying and downloading the e book (paper books are bad for the planet and bad for your karma) version of the Official Guide , which comes with an online question bank, or by going to the Veritas Question Bank and setting up an account, which is free by the way. Then by doing a few dozen DS questions you can get some practice handling the tricks of that type of question and have a forum for recalling and practicing using your math skills in general.
640 on little sleep is not that far from 720. It's possible that by familiarizing yourself with the test and its format, reviewing math some, and getting a few days practice with the questions you will hit your target. So you were not all that naive after all. While I am not sure how many days you have, you have some ideas for what you could do in a few hours here and there each day.
Here's a chart that shows fairly accurately how section scores match up with overall scores.
https://magoosh.com/gmat/2013/how-to-cal ... at-scores/ Hmm. With a little more familiarity, some practice, and a good night's sleep, you could bump that verbal score up to 43 or 44, for real. Then with a mere four more right answers on quant you score 45, or higher. There's your 720+.
Also, when you are taking the actual test, no matter how worn out you might get, don't be sitting there checking the clock and looking for the end. Just keep on keeping on with all the intensity you can muster. Get every right answer you can. That's part of the secret of rocking this test anyway. If you had done that the first time, and been more confident, maybe you would even have hit 680.
As you said, you are not stressing over this, so there's little reason not to sleep like a baby the night before, in a long, relaxing, information processing, getting oh so ready for the game type of sleep, and remember the GMAT is not really a math test or an English test. It's a reasoning game. So enjoy it, seeing it as something along the lines of a big ol' $250 a shot video game, and play to win.
