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GMAT Tuesdays with Kevin: Special Triangles — 45, 45, 90

Hello! This week, we’re diving into GMAT math for a review of this special triangle. It’s important that you learn not only how to identify this triangle, but also how to derive it, since that’s the skill you’ll need to show on your test! If you have any questions or comments for me, don’t hesitate […]

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Review of GMAT Focus Quantitative Diagnostic Tool

The GMAC offers a range of resources for those preparing for the GMAT. The Official Guide to the GMAT and GMAT Prep are invaluable to students, and we strongly encourage our students to purchase and download these resources for their preparation. Another resource available to students is the GMAT Focus® Online Quantitative Diagnostic Tool, which […]

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GMAT Math: The Uses and Abuses of Formulas

First, a few practice problems: 1) In the figure above, AC = BC = 8, angle C = 90°, and the circular arc has its center at point C.   Find the area of the shaded region. 2)  Employees at a company will vote for an executive team of five people from eight qualified candidates.  The […]

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GMAT Tuesdays with Kevin: Percent Change Trap, Part 2

This week is a continuation of last week’s GMAT Tuesday video! I’ll show you how to solve that tricky percent change problem faster with a little help from multipliers. Leave me a comment or question below! It’d really make my day :).

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GMAT Tuesdays with Kevin: Percent Change Trap

Beware of this common percent change trap! Keep this crucial concept in mind to help you stay safe on the test: if you go up by a percent and down by the same percent, you won’t end up in the same place. Also, make sure to come back next week, and I’ll teach you how […]

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Compound Interest on the GMAT

First, a few practice problems.  Remember: no calculator! 1) If $5,000,000 is the initial amount placed in an account that collects 7% annual interest, which of the following compounding rates would produce the largest total amount after two years? compounding annually compounding quarterly compounding monthly compounding daily All four of these would produce the same […]

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GMAT Tuesdays with Kevin: Math Foundations

This topic might be too easy for some of you, but you can never get enough of GMAT math review! Mastering fractions and proportions will prepare you for the more difficult problems you’ll see on the test :). Leave us a comment below if you have any questions about this video, and we’ll be happy […]

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Left Overs Ratios and a Double Matrix from the QA Webinar

We recently issued a call for you, and other students, to submit questions that we could answer in a video series. There were a lot of great submissions, and the ones that we thought useful for a broad swath of students, we answered in our video series. These videos will be released over the next […]

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GMAT Advanced Probability Problems

In the following probability problems, problems #1-3 function as a set, problems #4-5 are another set, and problems #6-7 are yet another set.  The scenarios are all similar in a set, and the answer choices for those problems in the same set are the same.  What is going on there?  Do all questions in the […]

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Backsolving on GMAT Math

First of all, try these challenging GMAT Problem Solving practice problems without a calculator. 2 3 4 5 6 2) In the month of August, Pentheus Corporation made $200,000 in profit.  Pentheus made 6% of that profit on the second Wednesday of August.   If the profits that day were approximately 14.5% of the revenue for […]

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