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!

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🔢 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.

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📘 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.

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✅ 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.

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📥 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!

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📌 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.

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💡 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.

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📚 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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