### Preface of the book on Quantitative Aptitude for CAT

- Learn from
**first principles**to ensure that you do not ‘plateau’ out in some topics - Do not bother with
really tough questions;
**do not agonize over speed**of computation

**Start from scratch (and**The first few questions are beguilingly simple. The plan is to provide a framework for students to handle tougher questions. The most instructive way to learn is by discovering ideas. Every chapter is broken into theory, exercise and CAT-level questions. The idea is to provide a framework with simple questions and ‘push’ students to discover some thought processes while handling CAT-level questions.

*then*increase difficulty level slowly):**Focus on building the thought process, and less on getting answers:**Let me illustrate with a simple example. There is a rule that goes like this – For a prime p greater than 3, p

^{2}– 1 is always a multiple of 24. Many CAT aspirants might have seen this rule, but few might know the basis behind this rule. p

^{2}-1 = (p -1) (p + 1). Now, if p is a prime > 3, p is odd. p-1 and p+1 are consecutive even numbers, which implies one of them will be a multiple of 4 and the other a multiple of 2. Or, (p-1) (p +1) will be a multiple of 8. Now, p-1, p, p+1 are three consecutive integers, implying that one of these has to be a multiple of 3. p is prime; so one of p -1 or p + 1 has to be a multiple of 3. This is why, p

^{2}– 1 is a multiple of 24. If you have gone through this process and you see the next rule to be – If p is a prime > 3, p has to be of the form 6k

__+__1(where k is a natural number), it becomes far easier to establish.

**Stay away from get-high-scores-quickly schemes:**I have consciously stayed away from short-cuts and other over-simplifications to ensure a stubborn focus on fundamentals. Many guys who crack CAT will tell you that the exam is about speed and good time management. They are correct. However, the ‘speed’ that they refer to is the ease with which you can zone in on the best method for a particular question, not necessarily the speed at which you can plug in a shortcut. I have appeared for the CAT multiple times and I can assert that if you ‘pick’ the best method as soon as you read the question, you’ll be able to approach all questions with time to spare. So, work on building that clarity. Many a time, this quest for speed is a distraction. If your fundamentals are sound, you will have time to burn.

**Assess where you stand every now and then:**Each topic ends with a set of CAT-level questions that acts as a benchmark for students. Innumerable books shoot either too low or too high when it comes to CAT preparation; I have taken enormous effort to ensure that CAT-level questions fall by and large into the band of difficulty that one is likely to encounter in the exam. If a student can confidently approach 80% of the questions in this category, he/she can be confident that this particular topic has been well covered. Barring the topic on combinatorics (where I have included a few tougher questions because learning by enumeration can be very instructive), almost every other question has been designed to be around the difficulty level one can expect in CAT.

**Prepare with intensity, but enjoy the process:**CAT tests intensity and stamina as much as it does application. Completing a 140-minute exam without concentration ‘drops’ is not easy. It takes immense practice. So, set yourself targets of 20 or 25 minutes for intense preparation and build up from there. Contrary to popular perception, this is not an exam that one should prepare for eight hours a day. If you study with intensity, it is difficult to spend more than two-three hours a day on CAT preparation. And, if you can do two hours a day with intensity for 90- 100 days, you will be in great shape for the exam. Focus on intensity, not time. Intensity can be built up without a feeling of being burdened by it only if you enjoy this process at some level. Looked at differently, CAT preparation can be seen as being similar to solving Sudoku or math puzzles along with some general reading. If your attitude is correct, this can be a lot of fun.

## What does the book provide?

## What does the book not provide?

# Acknowledgement

Labels: 2iim, 2iim Chennai, CAT 2013, CAT book, Quantitative Aptitude