R S Aggarwal book for the competitive exam is the best book as compared to other books. This book contains variety of question from different chapter. I read the read the book and I found that this book has questions from simple to difficult.
It is a perfect and excellent book to overcome all competitive exams. Especially, it is very easy to learn aptitude as an beginner.
A good thing about this book is it start with easy solving problems and end with difficult one. When we complete all problems in these book, then we can able to face all the exam and interviews aptitude test.
For example, Alligator and mixture, partnership, number ratio and proportion, permutations and combination topics explained very well.
If you understand all topics you can crack all the competitive exam. I recommend this book to everyone who are all preparing competitive exams.
Thank you.