To crack JEE main in one month you need to figure out the questions which are frequently asked in the exam if you observe carefully then you can find some topics which are asked every year start preparing those topics because creating chairman you need to score around hundred marks so which is not very tough solve all the previous years questions and also understand the concept behind it because many questions and different forms will get come and if you solve the previous years questions then the concept will help you to crack that particular question as well.