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Archive | Formulas

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? (A) compounding annually (B) compounding quarterly (C) compounding monthly (D) compounding daily (E) All four of […]

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GMAT Math Equations

Here’s a brief rundown of important GMAT math equations to know.  This outline will follow the organization of the “Math Review” in the GMAT OG.   Arithmetic It’s not really an equation, but you should know how to add & subtract & multiply & divide fractions.   Percents are all over the GMAT, and you should […]

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Breakdown of GMAT Quant Concepts by Frequency

Magoosh’s very own Mike McGarry, GMAT/Math Teacher/Tutor/Foosball player extraordinaire, went through 5 different sets of Official GMAT Practice Material and tallied questions based on the subject material they tested to find the most common GMAT questions. Here are the samples of Official Material he used to figure out the GMAT Quant breakdown: 1.GMAT Official Guide […]

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Isosceles Triangles on the GMAT

The GMAT quantitative section asks, among other things, about geometry. One of the GMAT’s favorite figures is the isosceles triangle.  An isosceles triangle is one that has two congruent sides.  Knowing simply that about a triangle has profound implications for answer GMAT Problem Solving & Data Sufficiency questions.   Euclid’s Remarkable Theorem Euclid first proved […]

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