Hey

Problems Plus in IIT Mathematics contains a large number of problems which test the student's ability to apply fundamental concepts in new situations. This is type of problems asked at the JEE (IIT). The purpose of this book is to show students how to handle such problems and give them sufficient practice in solving problems of this type, thus building their confidence. JEETNA KRO UTNA KAM HAI.

THIS LINK WILL BE HELP YOU. https://learn.careers360.com/engineering/jee-main-preparation-material/

Good Luck