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# gmat prep software

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Intern
Joined: 02 May 2010
Posts: 11

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17 Jun 2010, 08:39
I'm puzzled. I got 24 questions right out of 37 (quant section) on the GMAC prep sofware and that gave me a scaled score of 47. I've tryed one of knewton's cat and the same 24 questions right got me just 39. How can this be? Are they accurate?
Founder
Joined: 04 Dec 2002
Posts: 15143
Location: United States (WA)
GMAT 1: 750 Q49 V42

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17 Jun 2010, 09:19
Welcome to GMAT Club.
It is not really about how many questions you got right but how many hard questions you got right. There is no correlation between number of mistakes and the score since the test is adaptive. Also about a third of the questions are experimental and thus don't count/impact your score.
CEO
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2783
Location: Malaysia
Concentration: Technology, Entrepreneurship
Schools: ISB '15 (M)
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35

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17 Jun 2010, 09:27
BB, you are absolutely right but I have one quick question. Do these experimental questions count towards level determination?

Suppose there are 13 experimental questions and in the test you have 10 incorrect answers and all are experimental questions intersperse throughout.
Can you score Q51 just because all wrong questions were experimental? Even Q50 with 10 incorrect is not bad. If these exp questions are playing such role then, isnt it a sheer matter of luck by getting only exp questions wrong.
Founder
Joined: 04 Dec 2002
Posts: 15143
Location: United States (WA)
GMAT 1: 750 Q49 V42

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17 Jun 2010, 09:35
gurpreetsingh wrote:
BB, you are absolutely right but I have one quick question. Do these experimental questions count towards level determination?

Suppose there are 13 experimental questions and in the test you have 10 incorrect answers and all are experimental questions intersperse throughout.
Can you score Q51 just because all wrong questions were experimental? Even Q50 with 10 incorrect is not bad. If these exp questions are playing such role then, isnt it a sheer matter of luck by getting only exp questions wrong.

Supposedly they don't impact your performance at all.
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Knewton GMAT Representative
Joined: 23 Oct 2009
Posts: 112
Location: New York, NY
Schools: BA Amherst College, MFA Brooklyn College

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17 Jun 2010, 09:50
Yup, BB is spot on. Scores can differ based on difficulty of questions, plus there are those darned experimental questions. Our test are very accurate.

Thanks for the inquiry.
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Director
Joined: 25 Aug 2007
Posts: 936
WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain

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17 Jun 2010, 09:53
Yesterday, I retook the GMATPrep and got 50 in maths, though 1 incorrect in first 19 while 9 in next 18 (evenly spread). gurpreet, I think you judged correctly.
Re: gmat prep software   [#permalink] 17 Jun 2010, 09:53
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# gmat prep software

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