If you are a maths lover then you should definitely know about Mathematics by RD Sharma. this is a great book which includes a large number of examples, unsolved questions and the theory is explained in a very simple language.
In addition to this it also contains some high level questions which will increase your confidence in the subject.
if you do self study and don’t go to tutions then this book is made for you.
it is available for class 6 to class 12 students.