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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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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 Quantitative Comparison Tip #1 – Dealing with Variables

Today’s post is part one in a series of posts (Tip #2: Striving for Equality, Tip #3: Logic over Algebra, Tip #4: Comparing in Parts, Tip #5: Estimation with a Twist) devoted to Quantitative Comparison (QC) strategies. To help set up today’s discussion, please consider the following question: Column A Column B   A. The quantity […]

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