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Consider the following question: Set T consists of all multiples of 5 from 30 to 225 inclusive Column A Column B Mean of Set T Median of Set T 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 […]
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 […]
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. […]
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 […]
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. […]
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. […]
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 […]
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 […]
As I stated in my last post, the Fundamental Counting Principle (FCP) can be used to solve the majority of counting questions on the GRE. The FCP says: If we have a task consisting of stages, where one stage can be accomplished in A ways, another stage in B ways, another in C ways . […]
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, […]