Hi,

iit jam exam is conducted to take admission in M.Sc. (Two Years), Joint M.Sc.-Ph.D., M.Sc.-Ph.D. Dual Degree, and other Post-UG Degrees Programmes at the IITs of India and Integrated PhD Degree Programmes at IISc, Bangalore.

The eligibility of mathematics at class 10+2 level depend on course in which you want to take admission. For example if you want to take admission to Joint M.Sc.- Ph.D. in Molecular Medical Microbiology for this courses it is not necessary that  you have math at 10+2 level. However for the course  M.Sc.- Ph.D. Dual Degree in Environmental Science and Engineering it is compulsory to have mathematics at 10+2 level.

Hope this helps.