Ordering the puzzles - start by opening one hint at a time to see if it's enough information
How to you normally order the pages in a book?
Put the puzzles in the same sequential order as the pages. That is puzzle from pages 9-15-23-35-47
I have you solved the puzzles correctly and ordered them sequentially, you should have the following order 7-5-5-0-17
The combination for the safe is therefore 755017