Hello Dear Nift Aspirant, 

ELIGIBILITY For NIFT:
It's just the same as last year.
B.Des : 10+2 from any recognized board of education. 
B.FTech: 10+2 from any recognized board of education with Physics, Chemistry and Mathematics as core subjects.

M.Des: B.Sc. (Textiles & Clothing) or Bachelor in Applied Arts (Fashion Design / Visual Communication / Graphic Design / Industrial Design / Interior Design / Multimedia Design / Product Design / Textiles & Accessories) or B.Arch. or Design Diploma / Degree from NIFT / NID / International University of repute (Additional Industry experience in the related field would be preferred)
MFM: Graduation From a recognised University or Diploma in Accessory/Fashion Design/ FIT from NIFT only
M.FTech: B.E./ B.Tech. (Textiles / Apparel/ Mechanical/  Industrial/Production/ Electronics/ Computer/  Information Technology).

Maths that is asked in the B.des prog. is from class X, and as maths is compulsory till then it should not be a problem. see few sample papers you will understand.