# GMAT Blog

Welcome to part one of a three-part series on common mistakes that GMAT students make when answering Data Sufficiency questions. In this article, we’ll examine two kinds of mistakes that GMAT newcomers often make, and in the next two...
At some point during your high school years, your math teacher may have presented you with the following “proof” that 1 + 1 = 1. See if you can spot the problem. 1) Begin with the premise that b = c 2) Multiply both sides by b to get: b^2...
To set up this article, please try the following test: For the next 10 seconds, do NOT think about a bear wearing a dress while riding a unicycle into a pool filled with Superbowl rings. How did you do? If you passed that test, the next...
Try this one: What is the units digit of 13^35? A) 1 B) 3 C) 5 D) 7 E) 9 Let’s begin by looking for a pattern as we increase the exponent. 13^1 = 13 (units digit is 3) 13^2 = 169 (units digit is 9) 13^3 = 2197 (units digit is 7) Aside: As...
In this article, we’ll examine some strategies for avoiding careless mistakes on the GMAT. My primary focus will be on minimizing errors in the Quantitative section of the test, but some of the strategies can be applied to the Verbal...
So, you’re working on a GMAT question that requires you to find a certain percent. After some work, you get to the point where you must convert 11/49 into an approximate percent. What do you do from here? Well, as always, we should check...
Consider the following question:  N is a positive integer. When N is divided by 13, the remainder is 5. When N is divided by 46, the remainder is 31. What is the smallest possible value of N? Before we examine the solution to this question...
In this article, we’ll examine a guessing strategy to consider when tackling advanced Data Sufficiency questions on the GMAT. To set this up, let’s assume that I’m working on a Data Sufficiency question, and I examine statement (1) first...
When it comes to getting a great score on the GMAT, knowing how to answer the questions is only one piece of the puzzle. You also need to know how to optimize the conditions needed to achieve that great score. So, here are some things to...
In this article, we’ll examine the age-old dilemma of “that” vs. “which.” For example, which of these is correct? A) Gina enjoys television shows that have laugh tracks. B) Gina enjoys television shows, which have laugh tracks. Here’s...