IIT JAM

General Eligibility Criteria:
Indian national as well as foreign national are eligible for JAM. Candidates applying for JAM should have Bachelor's degree, as a qualifying examination degree. The qualifying examination must be passed with minimum 55% aggregate marks (in all subjects including Languages and Subsidiaries, all years combined) without rounding off. Candidates belonging to SC/ST category are required to obtain at least 50% aggregate marks, without rounding off. In case of grading system/CGPA, the equivalence in percentage of marks will be decided by the Admitting Institute. Candidates who are pursuing the qualifying examination have to submit the proof of passing the qualifying examination to the admitted institute by 30th September 2018. There is no restriction in the upper age limit for JAM.

Given below is a list of books I personally recommend for JAM Mathematics:
Linear Algebra done right by Sheldon Axler. A geometric approach to Linear Algebra by S kumaresan. Linear Algebra by Samvedhna publications. Real Analysis Bartle and Sherbert. Calculus Parts 1 and 2 by TM Apostol. Calculus by Anton, Davies. Group theory by Sudesh Kumari Shah. Good old Contemporary Abstract Algebra by Gallian for exercises. If you're a little more daring Try HERSTEIN. Ordinary differential equations by MD Raisinghania. Also remember to solve as many questions you can from past years papers of JAM M.A. And MS, TIFR GS exams, CMI applications of mathematics, NBHM M.Sc. Scholarship exams, etc.

Hello,
If you want to pursue M.Sc from IITs/IISc through IIT JAM then you must have 55% aggregate marks at B.Sc. Level. If you satisfied the complete criteria then you can apply for JAM. If you have done your B.Sc in chemistry then I will suggest you prepare for IIT JAM Chemistry: https://goo.gl/F8vLLR
The basic criteria for JAM given below: -
IIT JAM 2019 is open to all nationals (Indian/Foreign). There is no age restriction, i.e. there is no IIT JAM age eligibility, regardless of your current age, you can apply for JAM. To apply for admission to the desired programme, a candidate is required to qualify in the corresponding Test Paper and also satisfy the Minimum Educational Qualifications (MEQs) and Eligibility Requirements (ERs) of the respective academic programme. The candidates who have either appeared or are due to appear in the final examination of their qualifying degree in 2019 are also eligible to appear in the test.

Hello,
Instead of looking for coaching classes you can prepare for JAM by your own. IIT JAM Exam is not that tough. You can easily crack it if you study well. The best way to prepare for JAM Exam is solving previous year question papers. This will give you an idea about the pattern and difficulty level of the question. Click here http://bit.ly/2HO2qeT to download IIT JAM Question Papers. You should also take online mock tests. This will give you an idea about the patter and difficulty level of the questions. You must study at least 6-7 hours and give your last 30-45 minds to the revision daily. Makes notes on all the important stuff. This will help you in your last minute preparation.