Advice needed on approach to quant study for retest

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Friends,

I have just sat the GMAT and have scored very high on verbal, but abysmally low on quant - 36% percentile. While my score was slightly lower than what I had obtained in the GMATPrep official practice tests, I am still dismayed that I cannot get my score higher. What bugs me more is that many areas I focused on did not even get tested (see below). I have been preparing consistently for about four months, and, recognizing that I am a lot stronger on verbal, focused solely on math, and intensively so, for the last two weeks.

The resources I have used are:
  • Official guide, 13th and 12th editions
  • A well known and established test prep provider's most recent guide
  • The online material provided by a well-known online prep provider
  • Random questions posted in forums such as this one
While working my way through the OG guide (all questions), I found I was getting about 80% of them, including those near the end, correct.

Here's what I got tested on today:
  • Remainders
  • Triangles
  • Functions
  • Exponents
  • Rates
  • Work
  • Inequalities
  • Absolute values
  • Coordinate Geometry
  • Factors, LCM etc
Here are some areas that were not tested:
  • Roots
  • Probability
  • Simultaneous Equations
  • Sets
  • Counting
  • Shapes
  • Sequences
  • Ratios
  • Interest calculations

As you can see, some relatively easy topics (ratios, shapes, simultaneous equations) did not get tested at all. I am particularly frustrated at the choice of areas tested. During the practice tests, I struggled with sets, counting, and probability. So I dived deep into these areas in the last few week, got very good at them, and then nothing gets asked.

In order to best prepare for a retest, I welcome informed feedback on the following questions:
  • What conclusions, if any, should I draw from the algorithm's choice of questions today?
  • While working my way through the quant section, I did not "feel" like I was getting many questions wrong. I guessed rarely. My timing could have been a little less erratic - if a test-taker answers all questions, but takes an inordinate amount of time with some, does the algorithm take this into this and punish accordingly? And if so, how heavily does it punish? GMAC does not indicate that it does; some test prep consultants suggest that it does indeed punish. What is the truth of the matter?
  • This math material came easy, ridiculously easy, to me in high school. And I have a bachelor's in engineering which included a BA in mathematics. Although that was a long time ago, I am shocked at my struggle in this area. I appreciate that the GMAT ask things in tricky ways, combines areas together in one question etc., but I would have expected that, having re-familiarized myself with this subject over the last few months, it would come easy. Has anyone else faced the same hurdle, and how best to get over it?
  • Given all the above, what is a sensible way of approaching my study over the next four/five weeks before I re-sit?
Please, right now I am only interested in feedback on the GMAT in and of itself, not on scoring ranges and how they relate to admissions.

Many thanks
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by David@VeritasPrep » Fri Jul 05, 2013 6:09 pm
First, the test does not care how long you take on a question. If someone takes a bathroom break in the middle so that it looks like one question took 10 minutes this is not taken into account in any way - so strike that from your mind. The test knows one thing only - if you got the question right. There is not credit for choosing the "best wrong answer" and there is no penalty for "taking too long" - except of course for the fact that you may be rushed on later questions.

If you are capable of getting a high rate of questions right, as evidenced by your work with the official guide and if you felt that that the question you faced were not that difficult and you are surprised to have scored where you did - I have one conclusion to draw...You are making "unforced errors." I call these avoidable errors others may refer to them as silly mistakes.

You see, the test only knows if you got a question right or not. There is a fair chance of guessing correctly but the test takes care of that by not overvaluing one or two right answers at a given level. Likewise the test does not penalize you much for making a couple of avoidable errors or silly mistakes once in a while. But once you make several of these types of mistakes the computer begins to think that you cannot do questions correctly at that level.

Remember that the computer only knows that you missed the question, not that it was one that you knew how to do. So a small error appears to the computer the same way that a question you had no idea how to do would appear.

As to the topics that did and did not appear - I would not take to much from what you saw. The test has different ways of getting at things and they may have considered something a ratio question that did not appear to be a ratio to you. You are right to have studied what you did.

Again, if you are capable of getting the correct answer to most of the questions that you saw today then you have to ask, "Why did I not get the correct answer to those questions?" If you had your score would have been higher. I would point to avoidable errors and suggest that you in your practice you emphasize cutting down on these errors.

Here are three articles that can help you!

First, a two-part article from the Veritas Prep Blog on Good and Bad Errors.
https://www.veritasprep.com/blog/2013/01 ... -the-gmat/

https://www.veritasprep.com/blog/2013/01 ... -the-gmat/


Second, here is an article on the importance of "easy" questions.
https://www.beatthegmat.com/mba/2012/12/ ... n-the-gmat


And finally on article on the types of procedures that will help you avoid the avoidable (silly) errors.
https://www.beatthegmat.com/mba/2012/10/ ... -handrails
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by Pyderman » Sat Jul 06, 2013 10:45 am
Many thanks David for the detailed reply.

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by David@VeritasPrep » Sat Jul 06, 2013 11:13 am
You are welcome. Let me know if there is anything else I can help with.

P.S. Having looked back at your original posting I can see that one possible difficulty may be what I call the "diagnosis" of the question. Here is an article that might help you to see if your difficulty is in figuring out how to begin a problem, or in the execution of the "math" once you have determined a strategy.

https://www.beatthegmat.com/mba/2012/04/ ... at-success

Good luck!
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