Hi Nitish

You can get previous year question papers of BHU CHS for Maths by going through its official page , the link for the same is provided below

http://bhuonline.in/old-qus-paper-set17.html

These previous year question papers will help you in the preparation of your examination, it will let you know the examination pattern , difficulty level of the questions etc so that you can prepare for the exam accordingly

Thankyou