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Number Properties - Basics of Divisibility


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.

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Number Properties - Really Knowing the Factors


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 awa...

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Number Properties - Terminating Decimals Application


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 2^a * 5^b, the fraction is te...

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Number Properties - Composite Numbers


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 rem...

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Number Properties - The Integer Constraint


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 lea...

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Number Properties - Digits and Perfect Squares


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...

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Number Properties - Assuming Smart Variables!


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 solv...

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Number Properties - Speed and Accuracy Trade-Off


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 tr...

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Number Properties - Or Alphametic?


As noticed in our post on alphametics, a data sufficiency alphametic is far more complicated than a problem solving alphametic. An alphametic can have multiple solutions and establishing that it does...

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Number Properties - When Not to Use Number Plugging


Not every question with variables is suitable for number plugging. If there are too many variables, it can be confusing and error prone. Then there are some other cases where number plugging is not su...

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