Re: GMAT Math help
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Backsolving is the way to go for a lot of the GMAT math questions. Since the GMAT people usually list the choices in ascending order, start with C. From there you can usually eliminate 1/2 the remaining answers depending if the difference is too high or low.
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Yup.
Also, I was pretty rusty on math as well before I did mine so I took one of those prep courses and they teach you a lot of shortcuts for specific types of problems. Of course I don't remember any of them now, but if you have a review book or something like that there should be at least some info in there on how to deal. Plus, I'm pretty sure I took the GMAT on a computer and there was a built in calculator so not sure why that's a problem.
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