Hello Aspirant,
It's difficult to tell you the exact as cutoff varies every year but as per the previous year cutoff the chances are less to get M.Sc Mathematics in IITs & NITs. You can also check previous year cutoff to go through with the given below link.
https://university.careers360.com/articles/jam-cutoff
https://university.careers360.com/articles/ccmn-cutoff
Good Luck!
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