The prompt must:
1. **Identify and list all chapters** related to Number System from **each class (Nursery to 10th)** clearly, mentioning the **class name before the chapter name**.
2. For each identified chapter, **list all topics and subtopics** covered in that chapter **without skipping any**.
3. **Categorize** all topics into logical groups (e.g., Basic Concepts, Operations, Properties, Applications, etc.) to make understanding easier.
4. Arrange everything in **sequential learning order**, so that each next topic builds upon the previous one.
5. Ensure **no topic or subtopic is missed** from the PDF.
6. The output format should be structured as follows:
**Example Format:**
Class: 6
Chapter: Number System
→ Category 1: Basic Concepts
- Definition of Number System
- Types of Numbers (Natural, Whole, Integers, etc.)
→ Category 2: Operations
- Addition, Subtraction, Multiplication, Division
→ Category 3: Applications
- Word Problems
- Real-life Examples
Your task is to analyze the PDF and generate the complete structured list of all **Number System chapters, topics, and categories** accordingly.
