Never solve Maths or write answers directly on a PDF reader. Keep a separate notebook.
If you purchase the physical book or the official digital copy, here is the structure of the content you will find: std 9 navneet pdf gujarati medium
For Languages (Gujarati/English/Hindi):
For Science & Maths:
Navneet guides are available for almost all core subjects in the Std 9 curriculum. The most sought-after PDFs are for: Never solve Maths or write answers directly on a PDF reader