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Wow! Congratulations!
The raw scores, sectional ones, such as Q51 and V50 are calculated using a different algorithm then your overall score, the 790. That’s why you sometimes may have same raw scores but different overall score or vice versa.

That leads me to believe that each individual section score such a CR may also be calculated using a different algorithm from the raw score. However that still does not explain why you would only get Q 50, having missed no questions.

The only wild guess I have is that while the report show no wrong answers, you still may have made some mistakes on the experimental questions and gotten at least one of those wrong. I really have no idea otherwise why you would not get the V51.

Amazing score nevertheless.
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Wow! Congratulations!
The raw scores, sectional ones, such as Q51 and V50 are calculated using a different algorithm then your overall score, the 790. That’s why you sometimes may have same raw scores but different overall score or vice versa.

That leads me to believe that each individual section score such a CR may also be calculated using a different algorithm from the raw score. However that still does not explain why you would only get Q 50, having missed no questions.

The only wild guess I have is that while the report show no wrong answers, you still may have made some mistakes on the experimental questions and gotten at least one of those wrong. I really have no idea otherwise why you would not get the V51.

Amazing score nevertheless.

Hey BB, I thought that experimental questions are not used in score calculation.
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You are correct, they’re not used in score calculation. My wild guess was that perhaps they impact something very minor that added to V50 discrepancy... such sequence of questions or the difficulty of the following question. We do not know unfortunately.

Posted from my mobile device
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By the way, here is the only confirmed and real user debrief we have for 800 (afaik)

https://gmatclub.com/forum/long-debrief ... 35335.html

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Thanks all for the congratulations!

I attached the ESR for anyone who is curious. I neglected to mention in my original post I got a 7 on the IR. Doh! I got 8s on every practice test after the first few so this was a bit surprising. I guess I wasn't fully mentally in gear or was worn by the AWA assignment? Hard to say, but then again the IR was not something I spent any substantial amount of time on outside of the practice tests.

Thank you bb for the information on scoring. I guess it can't hurt to reach out to GMAC and see if they have an answer. If they won't disclose the reasoning I am still ecstatic about the score and feel blessed to have scored as high as I did.
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ESR.pdf [370.37 KiB]
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Thank you for sharing your ESR!

I have tweaked it a bit (removed your name from the description. (figured you did not want to have that left in there)
Also tweaked the subject of the post (I hope you do not mind).

I am going to guess you will be waiting a year or two until you apply? Or you heading for R2?

P.S. Congrats again and please do let us know what you hear back from the GMAC
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Thanks bb! I thought I thoroughly checked that was removed...

I don't mind the subject change at all.

My current plan is to apply R1 next year. If I don't get into one of my top choices I plan to reapply the next year. 4-5 years work experience seems to be the optimal amount time prior to getting an MBA and R1 next year will place me right at the 4 year mark at enrollment.

I will report back when I hear back from GMAC and get the official score report.
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Hi justalmost

Congrats on the awesome score.
Very inspiring debrief, and all the best for your applications!
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justalmost
Thanks all for the congratulations!

I attached the ESR for anyone who is curious. I neglected to mention in my original post I got a 7 on the IR. Doh! I got 8s on every practice test after the first few so this was a bit surprising. I guess I wasn't fully mentally in gear or was worn by the AWA assignment? Hard to say, but then again the IR was not something I spent any substantial amount of time on outside of the practice tests.

Thank you bb for the information on scoring. I guess it can't hurt to reach out to GMAC and see if they have an answer. If they won't disclose the reasoning I am still ecstatic about the score and feel blessed to have scored as high as I did.

WOAH ! you hardly took any time on the RC's.

bb, i have generally observed that if you are on the path to a top score on verbal, difficulty of the 2nd quartile is relatively higher than all the other quartiles. Is this observation sound ?
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justalmost
Thanks all for the congratulations!

I attached the ESR for anyone who is curious. I neglected to mention in my original post I got a 7 on the IR. Doh! I got 8s on every practice test after the first few so this was a bit surprising. I guess I wasn't fully mentally in gear or was worn by the AWA assignment? Hard to say, but then again the IR was not something I spent any substantial amount of time on outside of the practice tests.

Thank you bb for the information on scoring. I guess it can't hurt to reach out to GMAC and see if they have an answer. If they won't disclose the reasoning I am still ecstatic about the score and feel blessed to have scored as high as I did.

WOAH ! you hardly took any time on the RC's.

bb, i have generally observed that if you are on the path to a top score on verbal, difficulty of the 2nd quartile is relatively higher than all the other quartiles. Is this observation sound ?

That is a different conversation/topic - you are correct of the "humpy" nature of the GMAT - I have noticed it increase in difficulty until question 17 or so when there is nowhere else to go and then somewhat eases up. My theory is that it has to do with the economics and mechanics of the test... Here is my theory: GMAC can only get so many hard, so many medium and easy questions for the test. They can't afford to create 30 hard questions only for the top 1% of users to score V50. Would be very costly and very wasteful. Instead they create 10 hard questions and fill the rest of the time with easier questions for which they penalize more if you are on the path to a higher score. (Disclaimer - this has not been confirmed by GMAC)
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I am somewhat confused to see the difficulty at almost "medium" level for the entire test...
I remember I saw an ESR in which the difficulty level was over the chart...
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WOW! Nice job. Very impressive how quickly you got through the RCs. Also interesting to see that the verbal questions actually got easier in sections 3 and 4...
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mcelroytutoring, you may find this interesting.
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mcelroytutoring, you may find this interesting.
Very interesting indeed. Thanks for calling my attention to this, DIII. That's pretty absurd to get every question right on Verbal, yet still not earn a perfect score!

I'm guessing that it's a bug in the algorithm that requires you to answer all 58 (counted) questions right to earn a perfect 800. You can get up to 2 wrong on Quant and still earn a perfect 51, and of course 0 wrong on Verbal should normally be a perfect 51 as well, but if you happen to get 1-2 wrong on Quant and 0 wrong on Verbal, then perhaps the scoring algorithm will bump your Verbal down by a point to compensate. But if that's the case, then why not just bump the Quant down to 50/51 instead, since that's the section where you actually got 1 question wrong? Or why not just give you a Q51, V51 with a 790 composite, as I have seen some GMAT Clubbers saying they scored in the past?

Your Verbal score shouldn't have anything to do with the 11 experimental questions, since the experimental ("pretest") questions are unscored--or at least that's what GMAC tells us.

Anyway, congrats on the amazing score! In my opinion you deserved a perfect 800.
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Hello justalmost - Congratulations for the great score!

The flaw you pointed is indeed strange and it would be worth sending an email to GMAC, and there is high possibility that there is some flaw in the algorithm as pointed by mcelroytutoring

All the best for your applications and do let us know once you hear anything from GMAC. :-)
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It does look as if there is a flaw in the algorithm.

The verbal question difficulty chart in the ESR shows the question difficulty decreasing.

Given that you, as far as we can tell, got all the verbal questions right, the decrease in the difficulty should not have been caused by anything you did. In other words, the test had its own reasons for decreasing the difficulty. Those reasons could be that the test ran out of most difficult questions or that somehow your performance on experimental questions affected the difficulty, though clearly it should not.

Whatever reason the test had for decreasing the difficulty of the verbal questions in spite of your performance, it seems to have based your score on the difficulty of the questions that you answered, and therefore scored you at V50 rather than V51.

Adding to the mystery is that Rich Cohen reported that he scored 800 with Q51 and V50. So, it may be that your V50 was not even perceived by the test as being at the high end of the range that gets V50, but at the low end. Otherwise, perhaps you would have gotten a score of 800, though I guess it's possible that Rich got 100% of the quant questions he saw right, and so his 800 could have been the result of getting all quant questions right and perhaps one verbal question wrong.

Overall, the entire thing does not make sense. Definitely, you should bring this up with GMAC. Something is wrong, and while it is obvious that your scores are evidence of a problem, likely other people are being less obviously affected by whatever it is as well.

If the GMAT is indeed a little broken, as it does seem to be, fixing it right away would be best for all involved.
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MartyMurray
The verbal question difficulty chart in the ESR shows the question difficulty decreasing.

Given that you, as far as we can tell, got all the verbal questions right, the decrease in the difficulty should not have been caused by anything you did. In other words, the test had its own reasons for decreasing the difficulty. Those reasons could be that the test ran out of most difficult questions or that somehow your performance on experimental questions affected the difficulty, though clearly it should not.
In the case where you answer every question correctly for to 10 or more consecutive questions, it's impossible for the GMAT to keep feeding you harder questions. Instead, about 25% of the time it just feeds you a dummy experimental ("pretest") question. The rest of the time, the questions do indeed become more difficult overall, but there are easier ones mixed in there too, partly because the algorithm is also concerned about testing you in each subject area / GMAT question type.

You might get a hard Critical Reasoning question, for example, and if you answer it correctly, you might then get a much easier Sentence Correction question, because the test is done serving you CR questions, and needs to move on to RC and SC. This also holds true within each sub-category of questions, such as DS questions involving geometry, SC questions featuring parallel structure, CR questions with logical completion, etc. Thus, It's apparent that the GMAT scoring algorithm cycles through question difficulty levels over the course of the test, instead of constantly increasing them--even if you answer every question correctly.

Perhaps the GMAC is playing a trick on us by saying that the 25% of experimental ("pretest") questions on every official GMAT exam are "unscored." Could it be that the pretest questions themselves are unscored, but that they do affect the direction of the question difficulty / scoring algorithm? In your case, answering one too many experimental questions incorrectly could have prevented you from seeing enough difficult Verbal questions to earn a perfect 51/51. This would be a good question to ask GMAC directly.
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