Welcome to LastHopeStudy.com, your complete platform for 9th Class Computer Science notes based on the new PTB syllabus 2025–26. If you’re searching for Chapter 2 – Number Systems of the computer 9th new book, you’re at the right place!
🔢 9th Class Computer Chapter 2 – Number Systems | Notes PDF | New Book 2025–26
We’ve uploaded comprehensive and exam-focused notes including short questions, long questions, MCQs, and solved exercises — available in both Urdu Medium and English Medium — totally free to download or view online.
If you are searching for Urdu Medium notes of 9th class, then you are at the right place. These notes are specially designed for Urdu Medium (UM / um) students who study from the official Urdu Medium book by PECTA. Most of the websites only focus on English Medium content, but here you will find complete and reliable Urdu Medium notes according to the PECTA Urdu Medium book. Our aim is to provide Urdu Medium students with high-quality study resources that are easy to understand and fully exam-oriented. In this section, you will also get Urdu Medium Biology notes for 9th class, arranged chapter by chapter exactly according to the PECTA Urdu Medium Biology book. Along with Biology, we have also included Computer notes, Computer Science notes, and Computer and Entrepreneurship notes for Urdu Medium students, so they can find all subjects in one place. Whether you are searching for “Urdu Medium notes”, “9th class UM Biology notes”, “um notes for Urdu Medium Computer Science book” or “Urdu Medium Computer and Entrepreneurship book by PECTA notes”, you will always find this page helpful. These Urdu Medium Biology, Computer Science, and Entrepreneurship notes, along with other subjects, follow the same pattern as the Urdu Medium book by PECTA, making it simple for students to prepare each chapter step by step. By using these notes, Urdu Medium students can save time, focus on important Biology, Computer, and Entrepreneurship concepts as well as other subjects, and prepare effectively for exams.
📘 Chapter Overview – Number Systems
In Chapter 2 – Number Systems, students explore the backbone of digital computing. This chapter includes:
- Understanding different number systems
- Binary, Decimal, Octal, and Hexadecimal systems
- Conversion between number systems
- Binary addition and subtraction
- Application of number systems in computing
This is a high-concept chapter, and mastering it is essential for understanding logic design and data representation in computers.
✅ What’s Included in These Notes?
These notes follow the computer 9th class new book chapter 2 and are based on the latest PTB guidelines and board exam patterns. You’ll find:
✔️ Solved Exercises with Accurate Explanations
✔️ Important Short Questions (with answers)
✔️ Long Questions (board style)
✔️ MCQs with Correct Options
✔️ Step-by-Step Number System Conversions
✔️ Urdu Medium and English Medium Versions
✔️ Book-based wording for conceptual clarity
Whether you’re revising for school tests or preparing for board exams, these notes offer full support.
📥 View Online or Download Free PDF
Click below to view the notes online or download the full chapter in PDF format for offline study. Easy to read, mobile-friendly, and print-ready!
📌 Designed for All Punjab Boards
These notes are suitable for all Punjab boards under the Punjab Curriculum & Textbook Board (PCTB):
- Lahore Board
- Gujranwala Board
- Rawalpindi Board
- Faisalabad Board
- Multan Board
- Bahawalpur Board
- Sargodha Board
- DG Khan Board
- Sahiwal Board
No matter your city or board, our notes cover the new book and new syllabus requirements.
💡 Why This Chapter is Important?
The Number System is the foundation of all digital technology. A good understanding of this unit will help students grasp future topics such as:
- Digital logic design
- Binary calculations
- Data storage
- Programming fundamentals
Our computer class 9th new book lecture notes explain all tricky conversions and operations in a simple and easy-to-remember format.
📚 More Resources on LastHopeStudy.com
- 📘 9th Class Computer Notes – All Chapters
- 📗 Notes for Biology, Chemistry, Physics
- ✍️ Grammar, Letters, Applications, Essays
- 📋 MCQs & Smart Guess Papers
- 📝 Past Papers and Board-focused Questions
- ✅ Notes for Both Urdu & English Medium Students
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