Doctor R.S.Agrawal's mathmatics book is my ffavourite book in mathmatics subject.This book is S.Chand publication and modol number is-9788121951686.In this subject every topic is derive and explain very deeply.if student solve it properly than they can definately get knowledge and understand very well.R.S. Agrawal not only write only mathmatics but also many other subject just like Reasonig, General Study and English.This book is very helpful to crack any type of comptetive exam.Its level is also very good to understand to student the student.through this book we can also improve our math and we easily learn every topic.i think it is best book for Airithematic.Now a days for every comptition exam it is very important that we must have strong knowledge about mathmatics subject and also have good spwed, if we can solve it than we can notice that our maths is become very strong and also able to search short tricks after reading it.so in my opinion this book is excellant.