We know that the essentials of the Quant section are pretty simple: advanced topics such as derivatives, complex numbers, matrices …

## How to crack sentence correction without iron clad rules

You can rely on ironclad rules that never varied (the rules for exponents don’t change depending on the context of …

## Pronoun Ambiguity in Sentences

We encounter many different types of pronoun errors on the Verbal Section. Some of the most common errors include: Using a …

## Solving problems with lines crossing X or Y axis

Let’s learn about the cases in which lines on the XY plane cross, or do not cross, the x- or y-axis. …

## Standard Deviation Problems

Let’s look at some questions that involve sets with similar standard deviations such that it is hard to tell which will …

## A new way to use slope

The concept of slope is extremely important on theCAT – it is not sufficient to just know how to calculate …

## How to avoid traps on Data Sufficiency

Most test-takers like to go on auto-pilot when they can, relying on simple rules and heuristics rather than proving things …

## Probability questions using Diagrams

Today, let’s take a look at a question involving visual skills. It takes a moment to understand the given diagram, …

## Solving Standard Deviations sums without the formula

Let’s talk standard deviation. Your first thought is to start assembling a list of increasingly frantic questions: Do we need to know …

## Sequence

A sequence is really just a set of numbers. It may be infinite, it may be finite, but it’s this …