This is second part of the article. Part-I can be viewed here: When is the right time to take GMAT.
Before I explain the importance of OG12 I need to tell you how GMAT test works.
How GMAT adds new questions to their question bank & removes old questions, periodically.
Have you heard of experimental questions in GMAT? Around one quarter of GMAT questions you tackle in the test are experimental & they never get counted in your real GMAT score. They are present in both sections, verbal & quantitative and are placed randomly throughout the test. Yeah, but this is not important to us right now; our main concern is “why GMAC have them in the test when they are irreverent to the final score?”
Well! As they call it, they are experimental questions; they are untested and are brand new. To figure out the difficulty level of each of these questions, they experiment with them by adding them in current GMAT question pool. Based on response collected from GMAT test takers all across the world, questions are “tagged” with certain difficulty level. Once the difficulty level is identified these questions come in test as ‘real’ questions. (which then no more remain ‘experimental’).
The point is, questions in GMAT keep on changing but majority of questions remain in question bank for certain period. (In our checmical engineering terminology we call it space time 😉 ) Now you might realise the reason why you’re not allowed to retake the test immediately after your first (former) attempt. [hint! get the hint!!] (FYI, You need to wait for at least 30/31 days or something to retake it.)
In past when 11th edition just launched, I learned, test takers found quite a few questions from OG 11 in their real GMAT test …. same or similar set of questions. Although GMAT students can’t reveal the live questions they were certainly forunate to take the test during the period when OG was fresh and new. As time passed, test takers reported less questions or less similar questions in their real GMAT to official guide. It is therefore obvious to expect more similar questions in real GMAT these days when OG-12th edition is fresh-n-new.
So, what are you waiting for? Get the Official Guide 12th Edition now!
I must confess, this is series article & I drafted it in April 2009. But due to my erratic blogging frequency I didn’t publish it. I am fully aware that I should have posted it on OG-12th launch period but :sigh!: … anyways.
One more update is, official guide for verbal review & math review the two supplimentary books are about to be on stores in couple of months. Though I dont take them seriously, I just thought to inform you about it.
More about OG-12 & its review in next article <maybe> 😀