[分享]OG 12th vs. 11th区别及第三方机构的分析_ZZ

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[ZZ TS]OG 12 VS OG11


关于OG12的具体情况，大家可以比对着看看，有没有需要买。; M. I- f- L- r4 A5 _4 Q
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On March 13, the 12th Edition of the Official Guide for GMAT Review was released. We at Manhattan GMAT have analyzed the book in detail; here are our findings.

Not Radically Different-
Only 1/3 of the questions are new. Out of 907 problems, 607 are repeats. The best way to look at the 12th Edition is as a source of 300 great new practice problems.$ _; V2 f1 h8 X7 U' C+ Y& J

Much of the book is completely unchanged:  K+ L, P  e( w1 H

• Most explanations for repeated problems have been untouched, though some have been improved.
  
• The Diagnostic Exam, Math Review, Test-Taking Strategies and Directions are unchanged.
  
• Excluding the Diagnostic Exam, sample questions are organized by difficulty, according to the GMAC – just as they are in the 11th edition.
  

The removed and added problems constitute a slight shift
in the relative emphasis of certain topics, but the underlying content is essentially the same as that covered in the 11th Edition.

In fact, of the 300 new problems, some of the new Quant problems can be found in GMATFocus? (both GMAC products).4 J( g4 g$ ?, Y6 {2 d1 Q6 A& R0 C) V( ~

It is important to note that you should not over-interpret the changes from the 11th Edition to the 12th Edition! Some variation is to be expected. Nothing in these changes suggests a notable shift in how students should prepare for the exam. 7 I; I- C9 ~* _3 P0 V8 @1 ^
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Data Sufficiency Has Grown
The 12th Edition has 19 more Data Sufficiency problems than the 11th Edition. Moreover, 47% of the Data Sufficiency problems in the 12th Edition are new. For other question formats, turnover is in the 22%-36% range.; K% o' s6 w# z0 \5 ~2 V
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In addition, the 12th edition has 19 fewer Problem Solving questions than the 11th Edition. These shifts may suggest an increase in the relative importance of Data Sufficiency, but this is not certain.