HCF, LCM & Prime Factorisation

Write numbers as products of prime factors and use them to find the HCF and LCM.

Ways to work on it

• Worksheet

  Short questions you can check as you go, or print as a sheet with mark schemes.

  Open the worksheet

• Practice

  Exam-style questions with mark schemes, and a fresh set every time you ask.

  Open practice questions

• Quiz

  Fifteen questions that get harder as you go, marked as you answer.

  Start the quiz

More for GCSE Maths

• All GCSE Maths topics
• GCSE past papers
• What to revise