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Factors, Multiples & Primes

Revise Factors, Multiples & Primes in Number for GCSE Mathematics with 14 exam-style questions and 22 flashcards. This is a high-frequency exam topic, so students should expect to explain it clearly under timed conditions.

Study this topic

1

Building Blocks of Numbers

Introduction2

Key Definitions

Key Facts3

Finding Factors Systematically

Notes4

Prime Factor Trees

Diagram5

Finding HCF and LCM

Notes6

Advanced Techniques

Deep Dive7

Real-World Applications

Notes8

Exam Tips & Common Mistakes

Exam Tips

Sample Flashcards

Factor
A number that divides exactly into another number with no remainder. Example: Factors of 12 are 1, 2, 3, 4, 6, 12
Multiple
A number in the times table of another number. Example: Multiples of 5 are 5, 10, 15, 20, 25, 30...

Sample Questions

Which of these numbers is prime?

  • A. 27
  • B. 29
  • C. 33
  • D. 35
1 markfoundation

Explain why 51 is not a prime number.

2 marksstandard

14

exam-style questions

22

revision flashcards

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