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lifetantrik
18 Sep 2016, 11:23
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Recently took MGMAT CAT4. first 8 quant questions-> all 700-800 level-> all correct, est. percentile is 97. Got the 9th question wrong and it suddenly plummeted to 71. Can this be correct? 
19 Sep 2016, 15:02
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lifetantrik
Recently took MGMAT CAT4. first 8 quant questions-> all 700-800 level-> all correct, est. percentile is 97. Got the 9th question wrong and it suddenly plummeted to 71. Can this be correct?
It's hard to say, since the GMAC doesn't release information to us about the exact numbers involved in their algorithm. We do know the general shape of the algorithm, though, and our practice tests were recently looked over by Larry Rudner (https://www.manhattanprep.com/gmat/blog ... -endorsed/), who deemed them accurate.
The changes in your percentile as you get questions right or wrong will be substantially larger at the beginning of the test than at the end, both on our practice tests and on the official GMAT. But correct answers at the beginning count for more as well - if you're going to end up with a 99th percentile score, performing consistently at that level will quickly wipe out the effects of any single wrong answer. You can safely miss a lot of problems on the GMAT.
23 Sep 2016, 18:26
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Hi lifetantrik,
We can't comment for other tests but do note that no test prep company's algorithm will exactly match the real thing. The best we can do is get close.
You can always take a free GMAT PILL practice test here complete with detailed performance and timing analytics: https://www.gmatpill.com/gmat-practice-t ... ctice-test
In terms of our scoring, many of our students report scores that are +/- 30 points from their actual GMAT test and so are a relatively good indicator of their performance. That said, no practice test can perfectly replicate the actual score algorithm, but this is quite close.
We can't comment for other tests but do note that no test prep company's algorithm will exactly match the real thing. The best we can do is get close.
You can always take a free GMAT PILL practice test here complete with detailed performance and timing analytics: https://www.gmatpill.com/gmat-practice-t ... ctice-test
In terms of our scoring, many of our students report scores that are +/- 30 points from their actual GMAT test and so are a relatively good indicator of their performance. That said, no practice test can perfectly replicate the actual score algorithm, but this is quite close.
