Regarding rough work sheets

Is rough work required for every question I attempt. what if I made some guesses I wont be having any rough work for that.
Please anyone give me a detailed review on this.
Can anyone please give me an original sample of rough sheet to be uploaded

If you consider question booklet …

it has 20% question printed on it and 80% free rough area.

If you make much guess still it is more than enough.