Dear VAmshi!;

If you are preparing for jee mains for this session then i will advice you to go first for Previous year then you will probably able to know that how JEE Mains Questions are asked.

On other hand if you are asking about preparation without writing skills then according to my suggestion it will much fine to prepare because it will help you to perform multiple calculations and hypothesis in your brain without any writing on page.

So Go for your exam..

And Best of Luck...