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Author Archive | Brent

Systems of Equations on the GRE

The Power of Elimination How would you solve the system of linear equations below?                    x – y = 5                    2x + y = 13 There are two primary approaches for solving systems of linear equations: 1)   Substitution Method 2)   Elimination Method   The Substitution Method With this method, we take one of the […]

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Calculator Strategies for the Revised GRE

For many students, the addition of the GRE’s onscreen calculator to the revised exam is a godsend. These students take solace in the notion that this new calculator will help them solve tons of questions. The truth of the matter is that almost all math questions on the revised GRE can be solved without a calculator. […]

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GRE Quantitative Comparison Tip #5 – Estimation with a Twist

Here’s the whole series of QC tips: Tip #1: Dealing with Variables Tip #2: Striving for Equality Tip #3: Logic over Algebra Tip #4: Comparing in Parts Tip #5: Estimation with a Twist   In my last post, we solved the following question:         A. The quantity in Column A is greater B. The quantity […]

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GRE Quantitative Comparison Tip #4 – Comparing in Parts

To set up today’s Quantitative Comparison (QC) strategy, please solve the following question:           A. The quantity in Column A is greater B. The quantity in Column B is greater C. The two quantities are equal D. The relationship cannot be determined from the information given There are several different ways to solve this question. […]

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GRE Quantitative Comparison Tip #3 – Logic over Algebra

In previous posts (Tip #1 – Dealing with Variables, Tip #2: Striving for Equality), I have discussed two approaches when tackling Quantitative Comparison (QC) questions involving variables. Those approaches are: 1) Apply algebraic techniques 2) Plug in numbers In those posts, I noted that the algebraic approach is typically the faster and more reliable approach. […]

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GRE Quantitative Comparison Tip #2: Striving for Equality

In my previous post, we examined the pros and cons of two approaches for tackling Quantitative Comparison (QC) questions involving variables. Those approaches are: Apply algebraic techniques Plug in numbers In today’s post, we’ll examine a useful strategy that can increase the effectiveness of the plug-in-numbers approach. To set up today’s strategy, please consider the […]

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GRE Combinations and…Non-combinations

 Whenever I see a GRE resource label its counting section as “Combinations and Permutations,” a small part of me dies a little. Okay, that’s an exaggeration, but I am concerned about the misleading message that this sort of title conveys. To me, it suggests that counting questions can be solved using either permutations or combinations, […]

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