This is a good book focused on number properties/number system for Quantitative Aptitude exams. Content is good but well supported by examples. In terms of presentation, ease in understanding and exam focus towards CAT, XAT, CMAT etc I would still prefer "Demystifying number system". A lot of practice problems have been provided at the end of a chapter, in my personal opinion a very few are like the ones you see in competitive exam like CAT, they are either too easy or really tough. If you ar...

the book is a good help for people who are preparing fr GMAT or CAT.
the examples are well explained . it could be better if text could be more organized.
good buy i would recommend it.

The best book available in the market for Number system.All the concepts were given in a decent way covering from the elementary level.The best part of this book is the clarity it gives to tackle the problems, which is very important for competitive exams.It gives detailed solutions for all the problems...A separate section at the end of the book gives all the questions that has come in various competitive exams..A book worth buying if you are serious about your preparation.

KONCEPTS OF NUMBERS is the ideal book for students venturing upon competitive exams like CAT,GMAT,XAT,CMAT and other aptitude tests. It is extremely helpful as it is in details and with very good explanations. It consists a chapter on VEDIC MATHS which helps competitive exams aspirants with easy and faster calculations. Test papers will help students to practice various types of problems on numbers. It is a MUST BUY if you want to be a master of numbers.

Being a CAT 2012 taker & being fortunate enough to have access to the initial draft of the book being a student of Mr. Gajendra Kumar, the book had helped me strenghten my concepts of numbers superbly. The most comprehensive & easy to use book on numbers available in the market. This book is one of the reasons for my scoring 98 percentile in CAT & 99 percentile in SNAP. HIGHLY RECOMMENDED if you aim to score 95+ percentile.

This is one of the best book on number system. all the available books in the market for CAT prep has only 1 chapter for numbers, but this book has given a new height to to the concepts and questions. Distinguishing factor is that it has sufficient number of Data Sufficiency questions and each question is provided with detailed solution.

The author is a well-known trainer and the book is as expected. Good book for all IIM aspirants. I used to gift this book to all my top performing students.

It is a very useful book for those who prepares CAT. It teaches a lot of new things and many new concepts. It give s a very clear idea about different questions of number theory. A lot of questions in 5 different levels are clearly explained. After studying this book you will be a master in number theory

This book is good for those students whose base of mathematics is not so strong because this book will help them to cope with tricky type of questions which is asked in competitive exams like CAT,XAT,IIFT etc.The most helpful thing is that the book has given a lots of previous year's questions which will help aspirants to acquaint themselves the type of questions is asked.

Gajendera sir book (koncept of number) contain entire portions of number system in a well organized way topic wise and level wise as compare to other book available in market contain only 1 chapter on number system and problems are mixed up. But the best part is present of excellent collection of Data Sufficiency questions of each topic with detailed solution that make it best from rest.