Category: GMAT Math Basics

This post was updated in 2024 for the new GMAT. Let’s talk GMAT mathematical grouping symbols. Many folks remember Order of Operations by means of the mnemonic PEMDAS.  Just for review, PEMDAS is a quick way to remember the following order of mathematical prioritization: Priority #1: P = Parentheses Priority #2: E = Exponents Priority…

This post was updated in 2024 for the new GMAT. You might not feel decimals are the most exciting thing in the world, but just look at our friend , a decimal with its own holiday! In this edition of GMAT Math, we’re going over two specific types of decimals: terminating and repeating decimals.  Learn…

This post was updated in 2024 for the new GMAT. Master these seemingly intimidating mathematical symbols! Practice Questions First, try these practice questions. 1) The numbers a, b, and c are all non-zero integers. Is a > 0? Statement #1: Statement #2:   2) The numbers a, b, and c are all non-zero integers. Is…

For those of you who are ready to take on GMAT probability, here is the absolute bare minimum you need to know to successfully attack probability calculations on the GMAT: The Simplistic Probability Rules “AND” means MULTIPLY “OR” means ADD Is that the entire story? Well, no. But! If you can’t remember, or don’t understand anything…

In this post, we’ll go over the main GMAT probability rules you need to know. To find out where probability sits in the “big picture” of GMAT Quant, check out our breakdown of GMAT quant concepts. GMAT Probability Practice Questions First, some practice questions.  The scenario below is relevant to questions #1-#3. There are two…

Here are ten problems on fractions and decimals, some of which are quite challenging.  Remember, no calculator! (A) 0.1 (B) 1 (C) 10 (D) 100 (E) 1000 6)  Suppose you have access to a large vat of distilled water, several gallons large.  You have two precise measuring pipettes, one to measure exactly 1/3 of an…

A lot of students prepping for GMAT Quant, especially those GMAT students away from math for a long time, get lost when trying to divide by a square root. However, dividing by square roots is not something that should intimidate you. With a short refresher course, you’ll be able to divide by square roots in…

What are rates and ratios? How do rate and ratios problems differ? Hint: Not that much. Original photo by Pierre Rougier In fact, rates are just ratios in disguise. Here are a four GMAT practice problems exploring rates and ratios.  Remember: no calculator! Rates and Ratios Practice Problems 1) Someone on a skateboard is traveling 12 miles…