Hello Aspirant , For IIT JAM mathematics to take  preparation for  mathematics  only according to the syllabus of IIT JAM for admission in MSc mathematics Or dual degree of MSc PhD in mathematics

The exam is taken for admission in post graduation of chemistry, biotechnology, geology, mathematical statistics, physics,

and Economics.

Hope this will be helpful.

You have to only prepare for Mathematics Paper.

Aceing IIT JAM with a Good Rank will qualify you for a seat in one of the IITs, NITs and Other great Institutes like IISc Bangalore.

For more information about IIT JAM do follow the link below

https://university.careers360.com/articles/jam