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GMAT Tuesdays: Math Strategy – Halving and Doubling

What is Tuesday without GMAT Tuesdays? That’s right! Not a Tuesday! This week Kevin covers a useful strategy for multiplying that will save you time and energy on test day. We all know that we don’t get a calculator on the test, so we have to better understand what we are doing when we multiply […]

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GMAT Data Sufficiency: More Practice Questions

In the following problems, remember: no calculator!  Difficulty levels range from medium to hard. 2) Maggie is 15 years older than Bobby.  How old is Bobby? Statement #1: In 3 years, Maggie’s age will be 50% larger than Bobby’s age. Statement #2: Years ago, when Maggie was 25 years old, Bobby was 10 years old. […]

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GMAT Tricks with Systems of Equations: Part 5

A lot of GMAT test-takers vaguely remember a rule from high school, that it’s possible to solve for two variables if and only if you’re given two equations, and generally that it’s possible to solve for n variables if and only if you’re given n equations. Unfortunately, that rule isn’t quite correct as written, and […]

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GMAT Tuesdays: How to Prepare for GMAT Quantitative

Hello! Happy Tuesday! Today we are talking about the big picture stuff that you’ll need to know in order to improve your GMAT Quant game. Things like: 1. Structure Know the format of the GMAT Quantitative section before test day. For example, you should know: The number of questions in the section (37) How long […]

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GMAT Math: Weighted Averages

Problems range from easy to hard. 1) On a ferry, there are 50 cars and 10 trucks.  The cars have an average mass of 1200 kg and the trucks have an average mass of 3000 kg.  What is the average mass of all 60 vehicles on the ferry? 1200 kg 1500 kg 1800 kg 2100 […]

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GMAT Tricks with Systems of Equations: Part 4

A lot of GMAT test-takers vaguely remember a rule from high school, that it’s possible to solve for two variables if and only if you’re given two equations, and generally that it’s possible to solve for n variables if and only if you’re given n equations. Unfortunately, that rule isn’t quite correct as written, and […]

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GMAT Tricks with Systems of Equations: Part 3

A lot of GMAT test-takers vaguely remember a rule from high school, that it’s possible to solve for two variables if and only if you’re given two equations, and generally that it’s possible to solve for n variables if and only if you’re given n equations. Unfortunately, that rule isn’t quite correct as written, and […]

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GMAT Tricks with Systems of Equations: Part 2

A lot of GMAT test-takers vaguely remember a rule from high school, that it’s possible to solve for two variables if and only if you’re given two equations, and generally that it’s possible to solve for n variables if and only if you’re given n equations. Applying this rule incorrectly causes quite a few errors […]

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GMAT Tricks with Systems of Equations: Part 1

A lot of GMAT test-takers vaguely remember a rule from high school, that it’s possible to solve for two variables if and only if you’re given two equations, and generally that it’s possible to solve for n variables if and only if you’re given n equations. Unfortunately, that rule isn’t quite correct as written, and […]

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The Word “Or” in GMAT Math

Consider the following scenario. Suppose you solve for all the numbers in a Venn Diagram, in a scenario in which 200 students are taking AP Chemistry, AP Literature, both, or neither. Here are the results you find. OK, from this solved Venn diagram, there’s a ton we know: total in AP Chemistry = 50 + […]

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