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Number System: An Introduction — Syllabus

ICSE · Class 7 · Computer Studies

What Number System: An Introduction covers in ICSE Class 7 Computer Studies: 4 topics, for the 2026-27 session.

43 questions40 flashcards7 formulas & key relations5 concepts

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4 Topics · ICSE Class 7 Computer Studies · 2026-27

Topics in Number System: An Introduction

1

Decimal Number System

  • Uses the digits 0 to 9.
  • Its base is 10.
  • Each digit has a place value, such as thousands, hundreds, tens, and units.
2

Binary Number System

  • Uses only the digits 0 and 1.
  • Its base is 2.
  • Computers use binary internally for all operations.
3

Octal Number System

  • Uses digits 0 to 7.
  • Its base is 8.
  • Each octal digit corresponds to a unique 3-bit binary group.
4

Hexa-Decimal Number System

  • Uses digits 0 to 15.
  • Its base is 16.
  • Digits 10 to 15 are written as A, B, C, D, E, F.

Key Concepts

Central concept: Number systems used for representing and converting numbers in computer studies

Decimal Number SystemBinary Number SystemOctal Number SystemHexa-Decimal Number SystemNumber ConversionLSB and MSB

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Frequently Asked Questions

What are the important topics in Number System: An Introduction for ICSE Class 7 Computer Studies?
Key topics in Number System: An Introduction include Decimal Number System, Binary Number System, Octal Number System, Hexa-Decimal Number System. Study these first, then practise questions on each for Class 7 exams.
How should I revise Number System: An Introduction for Class 7 exams?
Learn the core ideas first, then work through the 43 practice questions on Number System: An Introduction. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 7 Computer Studies Syllabus

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