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The Few Mistakes in the Official Guide for GMAT Review 11th Edition.
Posted by michael on Sun 28 Sep 08 at 6:40pm The 11th Edition of The Official Guide for GMAT Review is one of the best resources for preparing for the GMAT, since it contains actual GMAT questions. However, even the Official Guide has a few mistakes. Recent printings have largely corrected the mistakes. However, since many students buy second hand books, I thought I would list some of the mistakes in the older printings here.
On page 112 under the Real Numbers heading of the Math Review, the third number above the number line should be the root of two not zero multiplied by the root of two.
On page 116 under the Sets heading of the Math Review in the third sentence of the second paragraph, a union of sets A and B should be expressed as AUB and an intersection should be expressed as A∩B.
On page 123 under Solving Equations by Factoring heading of the Math Review, the second equation that reads
x(x^2 + 2x +1) + 5(x1)2 = 0 should be changed to x(x^2  2x +1) + 5(x1)2 = 0.
On pages 136 under Coordinate Geometry heading of the Math Review the third to last line on the page, the equation that describes the line in the coordinate plane on page 137 is
y = – ½ x + 1.
On page 142 under the Interest Problems heading of the Math Review, the solution should read:
10,000 + (10,000)(0.05) = $10,500
10,500 + (10,500)(0.05) = $11,025
On page 153 of the Problem Solving Section, on question twenty both answer A and answer B have the same absolute value. The answer section of the Official Guide states that A is the correct answer, so answer choice E should be less than 2 but greater than the value indicated by answer choice D.


