Hello Aspirant,

To be honest jee mains / advanced are one of the most difficult examination in the country . So by completing 40% of the syllabus you can't be sure that you would be able to fetch 100 marks.

Because you need to work upon every area. Among those areas there would be some weak and strong areas . Accordingly you need to work on that. But you should work on the previous years and give your exams on full syllabus so that you would be able to crack the exam with flying colours.