This key facts covers Key Definitions within Factors, Multiples & Primes for GCSE Mathematics. Revise Factors, Multiples & Primes in Number for GCSE Mathematics with 14 exam-style questions and 22 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 8 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 8
Practice
14 questions
Recall
22 flashcards
Key Definitions
| Term | Definition | Example |
|---|---|---|
| Factor | A number that divides exactly into another with no remainder | Factors of 12: 1, 2, 3, 4, 6, 12 |
| Multiple | A number in the times table of another number | Multiples of 3: 3, 6, 9, 12, 15... |
| Prime Number | A number > 1 with exactly 2 factors (1 and itself) | 2, 3, 5, 7, 11, 13, 17, 19, 23... |
| Composite Number | A number with more than 2 factors (not prime) | 4, 6, 8, 9, 10, 12, 14, 15... |
| HCF | Highest Common Factor - largest factor shared by two numbers | HCF of 12 and 18 = 6 |
| LCM | Lowest Common Multiple - smallest positive multiple shared | LCM of 4 and 6 = 12 |