As you want to apply for IIT JAM Exam for that I want to know about attempts of this exam so here I am giving you same:

Attempts of IIT JAM Exam:
3 Times

Eligibility:
Candidate must have minimum 55% of marks in bachelor’s degree from a recognized University.

Here I am giving you some good books of IIT JAM:

IIT-JAMM.Sc. (Mathematics) Previous Papers (Solved) (English)
Author: RPH Editorial Board
Publisher: Ramesh Publishing House

IIT- JAM MATHEMATICS M.SC JOINT ADMISSION TEST PB (English)
Publisher: UNIQUE PUBLISHERS-NEW DELHI


IIT-JAM: M.Sc. Mathematical Statistics Joint Admission Test (English)
Publisher: UNIQUE PUBLISHERS-NEW DELHI


IIT-JAM M.Sc. (Biotechnology & Computer Applications) Prev. & Prac. Papers (English)
Publisher: Ramesh Publishing House