GCSE Maths Revision Guide
HCF and LCM
Highest Common Factor & Lowest Common Multiple using Venn diagrams or lists. This free GCSE Maths module combines short explanations, worked examples, flashcard-style recall, and timed practice so students can revise the topic without creating an account.
Foundation Skills
LCM
Lowest Common Multiple: the smallest number in both times tables. LCM of 4 & 6 = 12.
Higher Skills
Prime Factor Trees
Find HCF by multiplying overlapping prime factors in a Venn diagram. Find LCM by multiplying all numbers in the diagram.