First of all, reviewing the book from Arihant. This book is good for practice.
It has got tooo many mistakes in it(Arihant is famous for mistakes).
First go through a chapter's preview that is available on arihant's website.
Important chapters have more no. of questions for practice. I bought this book mainly for practice purpose, i.e just for question solving, and it does fulfill my needs. I got through many of the mistakes till now and student with decent knowledge will realize the
mista...

The book is very good for jee main preparation. Theory is given in brief. Best way to have a revision of old lessons but useful to set them on my mind in little time

Pros:
1) problems at the end of every day makes the lesson good and help to judge how the preparation is.
2) The problems are very related to JEE main syllabus and explanation is good enough.

Cons:
Not a good choice for JEE advance but it can help for advance level also.

A good piece from the house of Arihant.

aftr all i was not aiming to get a good mark in jee main even.....iit was far for me...
...i was after keam (kerala)........and when i just got this thing.....it was my last and final armory to use in the last 13 days....
....and what happened is.....i got mains and got selected for iit advncd...and dint passed it bt was able to take 47 marks atleast in it........just like dreaming :) ......i will alwys sugest this....coz it was my indrayudham in just 13 days :)

well u wont b master of IIT main jus by going thru 40 days of dis buk.however da buk gives u sneak view wat2 xpect...der.& buk itself is nt perfect as it contains few errors.it has solutions bt many r economical in clarity.bt still buk is gud for starters

If you want a book for preparing for JEE Mains then this book is totally recommended for you as it is the best for JEE Mains preparation and you will be very happy to practice all the sums from this book and gain confidence..as well.

Starting from the delivery
the delivery was very quick, got it within 2 days
Next.
I have been searching for a book which would suffice my need for JEE(mains)preparations,and searching throughout the market,i came across many books
such as modern ABC,marvel,himalaya,etc etc..
And found out there were so many printing mistakes in these books..formulas were not appropriate,etc..
then i bought this arihant 40 days book..
i must say,its the best for all the revision,solving,and detailed explanati...

Best book for revision but not good for first time students who have no idea of what to study for engineering

nice questions with high to low level questions good review of chapters most suitable for final preparation

Good book

it is good book nd printed well also.