Completed 12th science stream without maths.But now i wanna go for engineering.Is that possible?

i completed my 12th science with english,computer,biology,physics,chemist… am in cbse.i now want to go for engineering.what are the ways i can go for engineering.?heard abt National Open Schooling.where i can register to only maths nd write maths exam.is that enough.please help me pleaseeeee...