NumberIntroduction

Building Blocks of Numbers

Part of Factors, Multiples & Primes · GCSE GCSE Mathematics revision

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.

Topic position

Section 1 of 9

Practice

14 questions

Recall

22 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.

Keep building this topic

Read this section alongside the surrounding pages in Factors, Multiples & Primes. That gives you the full topic sequence instead of a single isolated revision point.

Key Definitions Finding Factors Systematically Prime Factor Trees

Practice Questions for Factors, Multiples & Primes

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

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...

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Factors, Multiples & Primes

Key Definitions