Hello,
If you want to atleast clear the cutoffs for JEE mains the. You must practice the Maths problems from the NCERT books and clear the basic concepts of Physics from NCERT books.  With NCERT books, you can build your foundation of the basic knowledge required for tackling advanced level problems in JEE. But NCERT books are not enough. They will help you clear the basic concepts but you need to go for other higher level books. Also you must practice the previous year question papers.
Please visit this link to get preparation tips and strategies for JEE mains. https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/jee-main-preparation-tips/amp&ved=2ahUKEwjwj__--Z7qAhVZXSsKHcSvDUcQFjABegQIBBAK&usg=AOvVaw3GSa8oPTbvFl7CX28keJA1&ampcf=1

You can also opt for the JEE mains crash course by Careers 360 which provides previous year question papers with solutions and 24x7 doubt clearing. https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/careers360-jee-main-crash-course/amp&ved=2ahUKEwjxlvaf-p7qAhXOR30KHYxKClAQFjAAegQIAxAB&usg=AOvVaw2qqSyBCop2N7ziMSe61Y3S&ampcf=1
Hope it helps

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