There is no such series as the best test series. But people consider the test papers by famous nationwide JEE preparation classes(like Pace, FITJEE). Because they usually contain all the important kinds of questions asked in the previous years' JEE papers. And to some extent, questions do get repeated, at least the type of the questions. Hence choose any of the test series, and solve each question thoroughly. You'll be good to give JEE MAINS. All the best!

Dear Singh

According to my experience test series of FIITJee ,Aakash,Resonance and ALLEN are the best you can find . These will help you to understand the pattern of JEE Exams. I personally used Aakash institute's test series and was able to get good score. But i think at the end it is just your hard work which will help you out.

I hope i was of some help to you.

Hi ! Well if you are speaking about mock test series then there are several. One of them Allen or resonance then fitjee. To be very honest the level of fitjee is very high and ask too much hard question which is not necessary for JEE mains but still may be for advance. Well for the case of Allen or motion or resonance it gives you the proper JEE main questions. So hope you understand and best of luck to you.