This introduction covers Building Blocks of Numbers 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 1 of 9 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Building Blocks of Numbers
Every whole number can be built from prime numbers - they're like the atoms of maths! Understanding factors (what divides into a number) and multiples (the times tables) helps with everything from simplifying fractions to solving real-world problems like tiling floors and scheduling events.
Practice questions for Factors, Multiples & Primes
Which of these numbers is prime?
Explain why 51 is not a prime number.
Quick recall 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...