In bihar board ncert is enough for score 90+ in math or other subjects

Dear Student, 

We would suggest you to download and solve as many Bihar Board Class 12 Previous Year Question Papers and Bihar Board Class 12 Sample Paper 2024-25 once you complete the NCERT syllabus for math or any other subject. These papers will help you to understand the format of the paper along with the types of questions that could be asked in the final paper. You can also understand the difficulty of the paper and can redirect your final preparation plan if required. 

Hopefully, the links added above will solve your query. Feel free to ask more questions.