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Geometry - Linear Relation on the XY axis


The concepts of direct, inverse and joint variation are commonly discussed but linear relation is not discussed often. Today, we will discuss what we mean by “linearly related”. 

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Number Properties - The Subtraction Problem


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

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Arithmetic - Deviation Method for Weighted Averages


We know we can use the deviation method to find the arithmetic mean of numbers. It is very useful in cases where the numbers are huge, as it considerably brings down the calculation time.

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Number Properties - Prime Numbers, Perfect Squares and Prickly Options!


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

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Statistics - Challenge Arithmetic Mean Question


Today, we will give you a challenge question. The challenge of reviewing this question is not that the question is hard to understand – it is that you will need to solve this official question within...

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Algebra - Unsolvable Equations


The moment we see an equation involving the variable x, we have a habit of jumping right into attempting to solve it. But what happens when we are not able to solve it? Let’s say, for example,

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Data Sufficiency - How to Arrive at Answer (E)


Today we will discuss a problem we sometimes face while attempting to solve Data Sufficiency questions for which the answer is actually E (when both statements together are not sufficient to answer th...

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Geometry - Parallel Lines and Transversals


Today, we will look at a Geometry concept involving parallel lines and transversals (a line that cuts through two parallel lines). This is the property: The ratios of the intercept

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Number Properties (Advanced) - Sum and Product of Consecutive Integers


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 ti...

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Number Properties (Advanced) - Remainders


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 diff...

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