Seriously, what will you do when you have past year exam papers for revision but you do not have the answer to it? (Assuming you can't get the answer from anyone)

1. Refer to your textbook and try to tackle the exam paper?

OR

2. Go to the Internet and try to find similar question with answer?

Personally, I will refer to my textbook.

I seriously think that the 2nd choice is a waste of time.

And I don't see what is wrong/illogical with referring to the textbook.