### Selecting the right numbers

When you begin studying for the CAT, you will quickly discover that most of the strategies are, on the surface, fairly simple. It will not come as a terribly big surprise that

### Property of Exponents

For integers x and y, 2^x + 2^y = 2^(36). What is the value of x + y? Think about it for a few seconds – could you come up

### To use permutation or combination formula?

A recurring question from many students who are preparing for CAT is this: When should one use the permutation formula and when should one use the combination formula? People have tried

### Keeping an open mind in CR

Let’s take a look at an example. All of the athletes who will win a medal in competition have spent many hours training under an elite coach. Michael is coached

### Driving Rules for Sentence Correction

When driving in the snow: Don’t brake until you have to. Don’t make sudden turns or lane changes, and only turn if you have to. Stay calm and leave yourself

### Logic in Algebra questions

Here’s an example: If x, y, and k are positive numbers such that [x/(x+y)]*10 + [y/(x+y)]*20 = k and if x < y, which of the following could be the

### Critical Reasoning involving rates

Let’s  look at an question and  convince you of the right answer: The faster a car is traveling, the less time the driver has to avoid a potential accident, and

### Difficult questions using basic concepts

It may seem like we will need trigonometry to handle this question, but that is not so. In fact, the question will look familiar at first, but will present unforeseen problems later on.

### Circular Arguments in Critical Reasoning

Consider this argument: Anatomical bilateral symmetry is a common trait. It follows, therefore, that it confers survival advantages on organisms. After all, if bilateral symmetry did not confer such advantages,

### Ratios in Data Sufficiency

We know that ratios are the building blocks for a lot of other concepts such as time/speed, work/rate and mixtures. As such, we spend a lot of time getting comfortable