Dear student the same thinks happens with me but it does not mean that we can't crack jee .

Understand the concept and buy some book I.e allen books etc and study for about 5 hrs ...

hey,

It happens to 70% of students. Do more questions, today you'll have 100 doubts, ask them. tomorrow you'll have less and lesser. it's all about self learning. 

good luck

Hey,

You can give some mocks and analyze the sections/areas where you need more practice. This will help you to streamline your efforts in the required direction.

Hope it helps!

Dear Student,

You don't need to worry about that. You just need a practice. 

Solve as many as problems related to the topics for your practice. You need to understand the logic behind the question. Don't memorize the problem.

Good Luck!!