GMAT Math Articles

It’s no secret that there are several strategies for tackling quantitative problems on the GMAT, but you may not have realized that combining methods creates even more options. Let’s take a look at the following … Read More

Here are four reasonably challenging problems about sets. 1) At a certain school of 200 students, the students can study French, Spanish, both or neither. Just as many study both as study neither. One quarter of those … Read More

Succeeding on the GMAT requires a great many things. Firstly, you must be able to decipher and solve complex logic puzzles in mere minutes. Secondly, you must be able to maintain focus for many consecutive hours. The … Read More

Questions on the GMAT can be described in many different ways. I’ve heard them described as everything from juvenile to vexing, simple to impossible. One term that appears very infrequently as a characteristic of the … Read More

Today we look at ways to achieve that much desired score of 51 in Quant. Obviously, we don’t need Sheldon Cooper’s smarts to realize that for that revered high score, we must do well on the high level questions but … Read More

Coordinate geometry, or Cartesian geometry, is the study of geometry using a coordinate system and the principles of algebra and analysis. The Coordinate Plane In coordinate geometry, points are placed on the … Read More

A polygon is a closed 2D shape with all the straight lines. A quadrilateral is a polygon with 4 sides or edges and four vertices or corners and the sum of its angles equals 360°. There are 5 types of quadrilaterals and … Read More

Consider the following two questions: Question #1: If 10 is the greatest common divisor of positive integers and , and 20 is the lowest common multiple of and , what is the value of ? A) 15 B) 20 C) 30 D) 100 E) 200 … Read More

There are few things more alluring than shortcuts. Oftentimes we are aware of how much work, effort or time is required to accomplish a task, but we naturally gravitate towards something that can accomplish that task … Read More

A function is a rule that takes an input and gives an output. When we are told the equation of a function, that equation makes explicit the rule this particular function is following. For example, for the function , the … Read More

How did it go last time with the rate problem? I’ve got another story problem for you, but this time we’re going to cover a different math area. Just a reminder: here’s a link to the first (and long ago) article in … Read More

Algebraic techniques can often help us solve word problems. The process typically involves assigning one or more variables, writing an equation (or two or three), and then solving that equation. It sounds easy enough, … Read More

In the past, we’ve talked about making story problems real. In other words, when the test gives you a story problem, don’t start making tables and writing equations and figuring out the algebraic solution. Rather, do … Read More

No introduction to this one—see what you can figure out and then we’ll talk about it! This is a GMATPrep® problem from the free exams. * “If n and y are positive integers and , which of the following must be an … Read More