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Revision Notes

Factors and Multiples — Revision Notes

ICSE · Class 5 · Mathematics

Factors and Multiples revision notes for ICSE Class 5 Mathematics: 4 topics in quick points. Part of the ICSE Class 5 Mathematics syllabus.

46 questions35 flashcards4 formulas & key relations4 concepts

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Key Topics to Revise

1

1. Factors and Multiples

  • A factor of a number divides it exactly without leaving a remainder.
  • Every number is a factor of itself and 1 is a factor of every number.
  • Multiples are found by multiplying a number with whole numbers (1, 2, 3...).
2

2. Prime and Composite Numbers

  • Prime numbers have exactly two factors: 1 and the number itself.
  • 2 is the only even prime number.
  • Composite numbers have more than two factors.
3

3. Co-prime and Twin Prime Numbers

  • Co-prime numbers have only 1 as a common factor.
  • Two prime numbers are always co-prime.
  • Consecutive numbers are always co-prime.
4

4. HCF (Highest Common Factor)

  • HCF is the largest number that divides two or more numbers exactly.
  • Can be found by listing common factors or using prime factorization.
  • Division method is best for large numbers.

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Full Notes

Key Concepts

A factor is a numberA prime number has only twoThe Highest Common Factor (HCF)These are shortcuts to check if

Frequently Asked Questions

What are the important topics in Factors and Multiples for ICSE Class 5 Mathematics?
Key topics in Factors and Multiples include Factors and Multiples, Prime and Composite Numbers, Co-prime and Twin Prime Numbers, HCF (Highest Common Factor). Study these first, then practise questions on each for Class 5 exams.
How should I revise Factors and Multiples for Class 5 exams?
Learn the core ideas first, then work through the 46 practice questions on Factors and Multiples. 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 5 Mathematics Revision Notes

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