I would hold off on the challenges. Some of the questions on there can be frustrating and you need to get the basics down well before doing the GMAT Challenges. I would sugguest doing the OG Quant and MGMAT stuff first for 1 or 2 weeks once you're back from your vacation. The OG is great and they're written the way GMAC does because GMAC writes them (yeah, I'm a quick one ).

I'm through #5 Math Challenge (Test) and they're pretty tough. I just did the best on m05 than I've ever done before. I got 85%. I'm happy with that. I got 66% on the first GMAT I took in April: 42Q, 38V [82%] with a Q66%, V84%. My goal is 45+ on each section. If I can get that, I'll be very happy. I've been gettign Q45 - Q48 on som CAT's I've found.

One thing I've noticed about the GMATClub Challenges that I'm not sure is true about the real GMAT is that the GMATClub Challenges seem to have quite a few questions that aren't difficult math questions, but the wording is tricky. These questions are more about reading ability and focus than quant ability.

That's my 2 cents.

You'll be fine. have fun on vacation.
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J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a$$.

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Five MGMAT math books and GMATprep reinstall (at least 8-9 times each test). Period. That's exactly how I went from Q36 to Q48, exactly what you need to hit 770.
Devote 2 or 3 months to that goal and I'm looking forward to reading your 770 debrief soon.
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My retake experience - GMAT dropped from 720 to 690 - advice for retakers
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690 after 2 weeks of studying translates to about 780 with 2 months of studying. That is not an exaggeration.

Great score! You should be very proud. I agree with everyone that another six weeks of solid work will give you the 760 you deserve.

On another note, how do I order the gmat club challenge questions.
I am going to use the official guides (quant and verb) to review the basics.
I have the GMAT software. How do you get the Manhattan GMAT practice tests?

Wow, thank you so much all for the motivating and helpful responses. I'm so glad that I stumbled upon this great community of people all in the same situation as me.

Fresinha12, in response to your question about the verbal, first let me say that I really, really sympathize with the plight of non-native speakers trying to take this test. I have spent a lot of time learning languages (Span, Fr, Port), and have reached pretty advanced levels, but I can't imagine having to take a GMAT in any one of them. Wow. Anyway, I'll share my test-taking method for the verbal, and maybe it will be helpful. I only did the verbal portion in its entirety three times before the test, but I was able to work out a method that took me from making 17 errors out of 41 questions on my first try to making only 4 errors on my third.

On critical reasoning, I would guess that the non-native speaker quant whizzes in this forum would do pretty well, given that it's very logic-based. I'll try to help with the verbal aspect of it though. What I generally do is read the passage once carefully, stopping after each sentence to process both its meaning, and its relation to the sentence before. Once I've read it all, I try to articulate (in a short sentence) the argument or purpose of the passage. Then I move to the question itself. I read it carefully, try to make sense of what it's asking, and then rephrase it to myself in language I can understand easily, so I have a clear idea of what I'm looking for. So, for instance, when I read "Each of the following, if true, weakens the conclusion above EXCEPT," I try not to go "what the hell does that mean?" Simply reasoning out the meaning doesn't always do the trick either, because I often forget what the question meant before I even get to the answer choices, and then I have to go back to the question and read it all over again. Instead, I figure out what the question is really asking, and restate it to myself in simple language. For me, the previous question would become, "which of these answers DOES NOT weaken the conclusion of this passage." Or if process of elimination is easier for me to work with, I might say, "which of these answers DOES weaken the conclusion of this passage," and then look to check off the four answer choices that fit that bill, leaving me with the correct answer. Those simplified versions of the question are sentences whose meaning I'm far less likely to forget, so I can now focus entirely on evaluating the answer choices, rather than struggling to keep the question in my mind at the same time. After I've rephrased the question, I write down the ABCDE on my noteboard. Then I try to pick the answer that best fits the simplified question I've come up with. If the questions are sounding gobbledy-googly also, I might try simplifying those as well, and seeing if that makes things any easier. It often helps me to start talking out loud when I'm trying to figure out the meanings of complicated-sounding sentences. I mean, keep it to GMAT exam room volume of course, but I've found that whispering the question choices to myself is a good way to keep a reign on my brain -- first, it ensures that I truly read every word and do not skip over words that might be important, and second, somehow it also helps me to actually understand what I am reading. My guess is that if someone were reading everything on this test to you, you'd probably understand it better. Try it, see if it works for you. The rest is up to the logical minds of all you quants. Read the answer choices, evaluate their meaning, figure out whether they DO weaken the conclusion of the passage, or DO NOT (or whatever the question is asking you to determine).

I'll write back later with more on the other two sections. I hope this is helpful for you!

How come we have to reinstall the GMATPrep so many times? I've only been doing once.. maybe that is why I see repeats?