Number Properties

A lot of GMAT test takers complain about insufficient time. This is understandable as far as the Verbal section is concerned. We all have different reading speeds and that itself accounts for a lot of time issues in the Verbal […]

Today, let’s take a look at an interesting number property. Once we discuss it, you might think, “I always knew that!” and “Really, what’s new here?” So let me give you a question beforehand: For integers  and , . What is the value […]

Fans of The Big Bang Theory will remember Sheldon Cooper’s quote from an old episode on his favourite number (often displayed on his tshirts too): “The best number is 73. Why? 73 is the 21st prime number. Its mirror, 37, […]

We know the divisibility rules of 2, 4 and 8: For 2 – If the last digit of the number is divisible by 2 (is even), then the number is divisible by 2. For 4 – If the number formed […]

Your first reaction to the title of this post is probably, “I know my subtraction well, thank you!” No surprise there. But what is surprising is that our statistics tell us that the following question – which is nothing extraordinary, […]

In some Quant questions, we are given big nasty numbers in the answer options and little else in the question stem. Often in such cases, the starting point is difficult for the test-taker to find, so today, we will discuss […]

Most people feel that the topic of number properties is hard or at least a little tricky. The reason is that no matter how much effort you put into it, you will still come across new concepts every time you […]

We have seen a number of posts on divisibility, odd-even concepts and perfect squares. Individually, each topic has very simple concepts but when they all come together in one question, it can be difficult to wrap one’s head around so […]

Let’s discuss a tricky little question on remainders today. It involves a lot of different concepts – remainder on division by 5, cyclicity and negative remainders. It actually is a little harder than your standard GMAT questions but the point […]

The discussion that follows doesn’t fall in the purview of GMAT and you needn’t know it. You will be able to solve any question without taking this post into account but that has never stopped us from letting loose our […]