Maths
Stretch Independent – Prime Factor Trees
Stretch (independent-school 11+): write a number as a product of its prime factors using a factor tree, and use it for HCF and LCM.
MathsAge 11+25 minutes
What this topic covers
- Build a factor tree to express a number as a product of primes.
- Write the product using index notation (72 = 2³ × 3²).
- Use prime factorisations to find the HCF and LCM of two numbers.
Core concept summaries
Key ConceptsGrow the TreeIndex NotationHCF and LCM from Primes
Practice formats pupils may meet
NeurofiED uses varied practice to help pupils apply the idea actively, check understanding and build confidence over time.
clozematchingquiz