Entrance exams for Ph.D in math’s from IITs

I want to take admission in the IIT for the Ph.D in math’s course? Please tell me what are Entrance exams for this course? Tell me about its eligibility?

[Raman Vij]

As you say that you want to take admission in the IIT for the Ph.D in math’s course. for this you should need to clear the IIT JAM exam.

IIT JAM exam

Joint Admission Test for M.Sc. (JAM) is an all-India examination conducted across the country jointly by Indian Institutes of Technology and Indian Institute of Science.

JAM is an all India Entrance examination for admission to M.Sc. (Two Year), Joint M.Sc.-Ph.D., M.Sc.-Ph.D. Dual Degree and other Post-Bachelor's Degree programs at the IITs and to the Integrated Ph.D. programs at IISc.

The programs offered at IIT through JAM 2015 are:

Joint MSc-PhD in

Chemistry
Geology
Geophysics
Mathematics
Physics

IIT-JAM Eligibility

The applicant must have Bachelor’s degree in Biology or Chemistry or Physics or Mathematics. The candidates should have passed Biology at the Higher Secondary (10+2) level.

The applicant have minimum of 60 per cent marks for GEN/OBC
There is 5% per cent relaxation for SC/ST category in aggregate
A minimum CPI of 6.0 for GEN/OBC
A minimum CPI of 5.5 for SC/ST