What you need to know
Check yourself against these “I can” statements.
- I can write a number as a product of its prime factors
- I can use prime factors or a Venn diagram to find the highest common factor (HCF) of two numbers
- I can find the lowest common multiple (LCM) of two numbers
- I can use HCF and LCM to solve problems
Practise this topic
2 resources⚙️ Worksheet
Prime Decomposition
Products of prime factors (of a number, of a product such as 40 × 63, and of a number in prime factor form times or divided by a small number, like 2⁴ × 3⁵ × 5 ÷ 9), HCF and LCM from (and using) prime decomposition for two and…
⬢ BlockbustersPrime Decomposition Blockbusters
Blockbusters with the questions from the Prime Decomposition worksheet: choose its levels for the ordinary hexagons and for the harder ★ ones. Show the answer and the worked solution, or play against the computer with multiple…
These are the pages for HCF and LCM in the GCSE scheme of work, following Pearson Edexcel GCSE (9–1) Mathematics, Higher tier (1MA1). Open this topic in Mr Wells Maths to see it alongside the rest of the course.