## GMAT Timing Tip: The Sunk Cost Fallacy

When students call me to discuss issues they’ve been having in their preparation, one of the most common concerns I hear is timing. Be it on practice tests or on the real thing, basically all GMAT test-takers experience a time crunch at some point during the test, if not throughout the entire exam. Now, if…

## 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…

## GMAT Data Sufficiency: Breaking Your Assumptions

One of the most widespread mistakes I see students make on Data Sufficiency concerns the information they consider when evaluating a statement. To properly determine whether a statement is sufficient, you must be focused on using only the information given. If, for example, a statement only tells you that -10 < x < 10, but says nothing else,…

## GMAT Sentence Correction the NYC Transit Way

Recently, while riding the subway, I saw an ad that captures one of the most common GMAT Sentence Correction errors. If you live in New York, you’ve probably seen it: “This poster can make you happier than any other on the subway.” Though I’m sure most subway riders have more pressing concerns than the nuances…

## 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.…

## GMAT Sentence Correction: “That” versus “Which”

One of the common grammatical stumbling blocks for GMAT test-takers concerns the appropriate use of “that” and “which.” Although the difference between “that” and “which” will almost never be the make-or-break difference in a GMAT Sentence Correction question, understanding when each term is correct can help you quickly eliminate choices on test day. The key…