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Factoring Exponential Expressions

Most of the time on the GMAT, manipulations with exponents are fairly straightforward. Usually, you’ll see two terms with a common base, and you’ll be expected to divide or multiply those terms (such as: 25 / 23 or 35 x 38). However, when you get to some of the higher-level questions, you’ll be expected to handle situations in which…
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Additional GMAT Practice

As an independent GMAT tutor with a knack for the unconventional, I work with many students who, for whatever reason, couldn’t quite crack the GMAT by just working through the Official Guide or with a set of books from a given company. Often, the difficulties these students encounter are a function of impersonal classrooms or…
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GMAT Quantitative Concept: Disguised Quadratics

If you’ve been studying for the GMAT, you’ve probably encountered situations that require knowledge of quadratic equations and how they work. In so doing, you’ve also probably memorized the following three equivalencies: (x + y)2 = x2 + 2xy + y2 (x – y)2 = x2 – 2xy + y2 (x – y)(x + y) = x2 – y2 Knowledge of these…
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GMAT Anxiety: Do Something!

As a full-time GMAT tutor, I work with many people who have taken the exam at least once before, and, in many cases, multiple times. For many of these students, the GMAT is no longer “just” a test they need to get into a good business school, but something almost existential. Though I hesitate to…
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GMAT Shortcuts

An enduring myth among many test-takers (GMAT and otherwise) is that standardized test preparation is simply a matter of memorizing a few rules and shortcuts and implementing these tricks on test day. This belief is only reinforced by large test-prep companies like The Princeton Review and Kaplan, whose curriculum is oriented around such superficial techniques.…
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How to study (and not study) for the GMAT

A wise dude named Einstein once defined insanity as such: “Doing the same thing over and over again and expecting different results.” Despite the somewhat philosophical tenor of this quote, I find it highly applicable to the situation that confronts many GMAT test-takers. Having developed and familiarized themselves with a certain approach, many GMATers come…
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Understanding the GMAT CAT: Perfection isn’t necessary

GMAT test-takers are an ambitious breed. Most of the students I encounter work full-time, have various extracurricular projects, and still find time to devote 10 – 15 hours each week to GMAT preparation. This is of course an admirable trait, and one that often translates well into GMAT success. The downside, though, is that most…
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