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Knewton Early Analysis of the OG 12th Edition Math Section

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Jose Ferreira GMAT Instructor
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Knewton Early Analysis of the OG 12th Edition Math Section

Post Sat Mar 14, 2009 11:20 am
Hey everyone,

Knewton has received an early shipment of the 12th Edition of the GMAT Review (The Official Guide), so we wanted to share with you some early details about what you can find in the new book. More to come! (Update: Verbal Analysis here!)

Here is a first look at the number of new and repeated questions in the Math section of the OG:

TOTAL (MATH):


11th Edition: 404 questions
12th Edition: 404 questions

New questions in 12th Edition: 146 (36%)
Repeated questions in 12th Edition: 258 (64%)

PROBLEM SOLVING:

11th Edition: 249 questions
12th Edition: 230 questions

New questions in 12th Edition: 52 (23%)
Repeated questions in 12th Edition: 178 (77%)
Questions deleted from 11th Edition: 71 (29%)

DATA SUFFICIENCY:

11th Edition: 155 questions
12th Edition: 174 questions!

New questions in 12th Edition: 94 (54%)
Repeated questions in 12th Edition: 80 (46%)
Questions deleted from 11th Edition: 75 (48%)

As you can see, the total number of questions has not changed, but there are now 19 fewer Problem Solving questions and 19 more Data Sufficiency questions. We think this is great, since, in our experience, most students have more trouble with the DS section.

There are also many more new DS questions (94) than there are PS questions (52). Here is a complete list of the new questions in each section (question numbers in the 12th Edition).

Stay tuned for our analysis of the Verbal Section, coming soon. Let us know if you have specific questions we can look into!

Problem Solving
===============
2, 5, 13, 18, 23, 24, 27, 28, 40, 42, 43, 45, 48, 50, 54, 58, 59, 60, 65, 66, 68, 69, 73, 74, 81, 82, 83, 89, 90, 91, 92, 99, 105, 106, 107, 108, 109, 110, 117, 119, 124, 142, 143, 146, 148, 157, 159, 163, 164, 171, 197, 230


Data Sufficiency
===============
4, 7, 8, 9, 13, 14, 17, 18, 19, 21, 22, 24, 25, 26, 27, 28, 31, 32, 33, 36, 37, 38, 39, 42, 44, 45, 46, 48, 49, 52, 53, 54, 55, 57, 58, 59, 62, 63, 66, 66, 67, 68, 69, 70, 75, 76, 77, 78, 79, 80, 81, 82, 87, 88, 89, 90, 93, 94, 97, 98, 99, 100, 101, 104, 105, 106, 109, 110, 111, 112, 115, 116, 117, 120, 121, 122, 123, 124, 128, 129, 132, 133, 134, 137, 141, 142, 147, 148, 151, 152, 157, 161, 162, 167, 168

_________________
Jose Ferreira
Founder and CEO, Knewton, Inc.
http://www.knewton.com/gmat



Last edited by Jose Ferreira on Mon Mar 16, 2009 5:40 pm; edited 2 times in total

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Ian Stewart GMAT Instructor
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Post Fri Mar 27, 2009 9:17 am
DonDraper wrote:
This exercise is silly. This is like studying a ten-year-old map to figure out how to get around a new city. The whole reason GMAC is willing to share these questions is because they're retired.

I think that anyone who takes this exercise seriously is fooling themselves.
If you take a real GMAT, you'll appreciate that the available retired questions are the most similar available to what you see on the real test. I'll agree with you that one 'reason GMAC is willing to share these questions is because they're retired' - they certainly would not be willing to share questions which are still in the current live question pool, and understandably so. Still, there are many conceptual commonalities among retired and live questions, and if you can understand how to solve every available retired question, you're virtually certain to do well on test day.

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DonDraper Junior | Next Rank: 30 Posts
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Post Fri Mar 27, 2009 7:48 am
This exercise is silly. This is like studying a ten-year-old map to figure out how to get around a new city. The whole reason GMAC is willing to share these questions is because they're retired.

I think that anyone who takes this exercise seriously is fooling themselves.

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kevincanspain GMAT Instructor
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Post Fri May 07, 2010 1:54 pm
hephzi_bah wrote:
Well, under my humble opinion the 12th edition is the very worst ever edition. I teach for the GMAT since 1994 and I have all editions form OG and all the possible "old" booklets since it was paper base test. 12th edition not pass the test by other OG editions....

Sincerely
Alberto Vidal
What do you find disappointing about the 12th Edition? How doesn't it measure up to the 11th?

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Post Fri May 07, 2010 1:02 pm
Well, under my humble opinion the 12th edition is the very worst ever edition. I teach for the GMAT since 1994 and I have all editions form OG and all the possible "old" booklets since it was paper base test. 12th edition not pass the test by other OG editions....

Sincerely
Alberto Vidal

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Ian Stewart GMAT Instructor
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Post Fri Mar 27, 2009 10:03 am
DonDraper wrote:
Ian, I agree with all of what you said. My argument is that trying to divine where the test is going, because the OG has 19 more data sufficiency questions than before, is kind of pointless.
I see what you mean - I misunderstood your original point. I agree - the best way to determine where the real GMAT is going is by looking at real GMAT tests. It is the case that the proportion of Quant questions which are DS has risen over the past few years, however, and it is perhaps not coincidental that this shift is reflected in the new balance of question types in the 12th edition of the OG. I'd be less confident drawing conclusions about topic balance from small shifts in distribution of topics in the new OG - perhaps that's meaningful, perhaps not.

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DonDraper Junior | Next Rank: 30 Posts
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Post Fri Mar 27, 2009 9:42 am
Ian, I agree with all of what you said. My argument is that trying to divine where the test is going, because the OG has 19 more data sufficiency questions than before, is kind of pointless.

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NethraN Senior | Next Rank: 100 Posts Default Avatar
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Post Fri Mar 20, 2009 9:50 am
Jose Ferreira,
Thanks a lot for sharing this information. It is surely very helpful.

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logitech Legendary Member
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Post Thu Mar 19, 2009 9:29 am
I would recommend everybody to purchase the GMAT FOCUS tests on www.mba.com

This alone will be the best investment you can make to get the feeling of "current" DS and PS question levels and find out what your scoring range is..

GMAT Focus Online Quantitative Diagnostic Tool - Bundle of 3
US$65.00

http://www.mba.com/mba/store/ProductInfo?SKU=1612829X

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cubicle_bound_misfit Master | Next Rank: 500 Posts
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Post Wed Mar 18, 2009 7:39 am
please let us know if DS has become tougher.

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msanthosh2004 Newbie | Next Rank: 10 Posts Default Avatar
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Post Wed Mar 18, 2009 1:35 am
Hi,

Any idea whether these questions are from Official GMAT Math review book. If these extra questions from math review then its not sensible for people who have math review book to buy this. Any idea abt that ?

Cheers,
San

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maihuna Legendary Member Default Avatar
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Post Sat Mar 14, 2009 1:03 pm
Hi Jose,
I have one question, do you see any paper based questions in new set of questions? How many questions are in hard bins for each section?

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cramya Legendary Member Default Avatar
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Post Sat Mar 14, 2009 12:09 pm
Jose,
Kind of u to share the info with the BTG members.


Any insights on the Verbal side(especially CR)??

Thanks!



Regards,
Cramya

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maihuna Legendary Member Default Avatar
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Post Sat Mar 14, 2009 11:33 am
Yep thats a good question, we need to see it that way...btw, thanks newton ceo for quick updates...u guys/gals are much ahead in race with others...

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DanaJ Site Admin
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Post Sat Mar 14, 2009 11:28 am

My question about this (and I believe it's a fundamental question) is: are the problems different in content or only in numbers? I believe that this is really important, since if you change the numbers of a problem, but still test the same type of issue, there isn't much of a difference.
However, if the type of problems is different (i.e. testing different concepts), then there might be some issues.

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