Hello Aspirant,

See Previous year question papers are good source of revision but only relying upon solving previous year question papers would not solve the purpose because to practice those papers you need to have thorough knowledge of the syllabus so you need to read books as well and if you are down with your JEE syllabus then definitely you should put all your focus on solving previous year question papers and sample papers.

I hope this information helps you.

Good Luck!!

Hi pyq is very important for both jee mains and advanced but you also have to face new question like new application of concepts and also have to give mocks for better strategy and time management. You should prepare well all  the concepts and you should not leave any single topic.