What This Book Actually Is
Arun Sharma's Quantitative Aptitude for CAT is one of those books that every MBA aspirant in India has on their shelf at some point. It covers everything from basic arithmetic to advanced topics like number systems and modern math. The book is structured by difficulty levels, which is useful because it lets you work your way up without getting crushed on day one. The chapters are divided into three levels: Level of Difficulty I, II, and III. You start with Level I, which tests basic concept understanding, then move to Level II for application-level problems, and Level III for questions that mimic actual CAT difficulty. There are a number of sites hosting the PDF version of this book. If you search for it on document sharing platforms or educational forums, you will find links quickly enough. Just be careful about the quality of the scan. Some versions have missing pages, blurry text, or wrong page orders. I once downloaded a copy where the entire Time Speed and Distance chapter was in a completely jumbled order, and it took me twenty minutes to rearrange the pages before I could actually study from it. Always cross-check the table of contents against a verified list before you commit to a version. Most people treat this book as a reading material and go through the theory sections cover to cover. That is not how it works. The theory sections are decent but they are not exhaustive. The real value is in the solved examples and the practice questions at the end of each chapter. Start by reading the concept explanation in about ten to fifteen minutes per subtopic. Then immediately attempt the Level I questions. Do not keep going back to the theory every time you get stuck. The point of the book is to build problem solving reflexes, not to memorize formulas.
One thing that catches people off guard is the assumption that you need to finish all three levels. You do not. For CAT, Level I and Level II are enough for most topics. Level III questions are often designed to be unusually tricky and time consuming. In the actual exam, spending more than two minutes on any single question is a losing strategy anyway. I learned this the hard way during my second attempt when I kept grinding through Level III sets for Number Systems and ended up with negative accuracy because I was solving questions that would never appear in that format on test day.
Topics That Matter Most
Not all chapters carry equal weight. Arithmetic, specifically percentages, ratios, profit and loss, and time speed distance, accounts for roughly forty to fifty percent of the QA section in recent CAT papers. These chapters should get the majority of your preparation time. Modern Math topics like permutations and combinations, probability, and set theory are high yield but also time consuming to master. If you are short on time, prioritize Arithmetic first, then move to Number Systems, and finally touch Modern Math if you have cycles left. The geometry and coordinate geometry sections are tricky. They have a high ceiling but also a high floor of difficulty. I recommend working through them only after you have solid accuracy in the earlier topics. Many students waste weeks on geometry trying to memorize every theorem and property without building the foundational speed in simpler areas where marks are more guaranteed.
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Common Mistakes People Make
The biggest mistake is treating this book like a novel and reading it passively. The second biggest is skipping the basics and jumping straight to Level III questions. A third mistake I see constantly is people doing the questions but never analyzing their errors. You need a separate notebook where you write down every question you got wrong, the reason you got it wrong, and the correct approach. Without that habit, you will repeat the same mistakes across chapters. Another issue is that the book does not cover every question type that CAT has asked in recent years. There are a few newer patterns, particularly in data interpretation sets that mix multiple topics, that this book does not address well. For those, you need to supplement with previous year CAT papers and coaching institute material. The book is a solid foundation, not a complete preparation resource by itself.
Realistic Expectations
If you complete Level I and Level II of all major chapters with decent accuracy, you are looking at a baseline score in the QA section that can get you to the cutoff for most IIMs. Getting a high percentile requires additional practice beyond this book, mainly through mock tests and sectional timed practice. The book alone will not take you from seventy to ninety-five percentile. That jump comes from practicing under exam conditions and identifying your weak spots through analysis, not from solving more problems in the same format. Also, the book has some known errors in answer keys for certain questions, particularly in the earlier editions. I have seen at least three instances where the given answer was wrong and the explanation contradicted itself. When you encounter something like that, do not just accept the answer key. Work through the problem independently and verify. If your result matches none of the options, check online forums where other aspirants have flagged those discrepancies. It happens more often than publishers would like to admit.
Alternatives Worth Considering
If you find Arun Sharma's writing style too verbose, there are other options. NMAT Guide by Nishit K. Sinha is more concise and covers similar ground. For pure practice volume, previous year CAT papers combined with coaching institute modules like TIME or IMS material will give you more exam oriented practice. If your foundation is very weak, starting with R.S. Aggarwal's Quantitative Aptitude before moving to Arun Sharma might save you time rather than frustrating yourself through the beginning chapters. The book remains one of the more reliable standalone resources available in the Indian market for CAT preparation. It is not perfect, it has gaps, and it requires you to work through it actively rather than passively. But if you use it the way it was designed to be used, it will serve you well enough for the majority of what the exam demands.
