Venn diagrams are like Superman – all powerful. They can help you solve almost all questions involving either 2 or 3 …

## Strategies to solve Data sufficiency problems

Biggie Smalls Strategy #1: Biggie Smalls Consider this Data Sufficiency problem: What is the value of integer z? 1) z is …

## When you get right answer through wrong logic

It is common for test-takers to think in the right direction, understand what a question gives and what it is asking …

## Dealing with tangents to a parabola

Considering a two dimensional figure, a tangent is a line that touches a curve at a single point. Here are some examples …

## What makes quants questions difficult?

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 …