Yes you can... question  paper can be used for the Rough works .in the question paper there would be the space for having the Rough work below the questions and in the last section of the question paper there would be the blank pages for this purpose
If you are appearing in the online examination then you can have as many as sheets as you want for the Rough work

Dear Babu
For online
They'll give 2 sheets for calculations and rough work and I think if you use the space provided wisely then these two sheets are enough to do the whole paper calculations.
For offline
As Mayank said I do agree with that every paper there will be some space and at last 4 will be provided. 
Do use those sheets carefully.
All the best.

I am here talking about jee mains exam.

• For jee mains offline exam that is going to be conducted on 8th April,You can do rough works at the bottom of each page of question paper and at the last 4 papes of it.You can do rough work only on your question paper.
• For jee mains online exam that is going to be conducted on 15th and 16th April,you will be provided A4 size blank sheets for your rough work.