Number Properties

Let’s take a look at a question which shows us how GMAT tests rounding of numbers. A set has 21 positive decimals, none of which is an integer, and the sum of the 21 decimals is . The estimated sum of […]

Today, we will discuss the topic of Divisibility. We will discuss what divisibility is at a very basic level this week and then move on to remainders in the coming weeks. So the first question is – what is division? […]

What we will discuss today is a very simple concept but it seems odd to us when we first confront it even if we are very comfortable with factors and divisibility. If we tell you the concept right away, you […]

A recap on Terminating Decimals: – To figure out whether the fraction is terminating, bring it down to its lowest form. – Focus on the denominator – if it is of the form , the fraction is terminating, else it is […]

We love to talk about prime numbers and their various properties, but composite numbers usually aren’t mentioned. Composite numbers are often viewed as whatever is leftover after prime numbers are removed from a set of positive integers (except 1 because […]

We know that the essentials of the GMAT Quant section are pretty simple: advanced topics such as derivatives, complex numbers, matrices and trigonometry are not included, while fundamentals we all learned from our high school math books are included. So […]

What determines whether or not a question can be considered a GMAT question? We know that GMAT questions that are based on seemingly basic concepts can be camouflaged such that they may “appear” to be very hard. Is it true […]

In today’s post, we will discuss some smart formats in which we can assume variables on the GMAT. These will allow us to minimize the amount of manipulations and calculations that are required to solve certain Quant problems. Here are […]

We know that speed is important in GMAT. We have about 2 mins per question and we always have questions in which we get stuck, waste 3-4 mins and probably still answer incorrectly. So we are always trying to go […]

Today we discuss the kind of questions which beg you to stay away from number plugging (but somehow, people still insist on using it because they see variables). Not every question with variables is suitable for number plugging. If there […]