# HCF & LCM using a Venn Diagram

## Curriculum support•40 mins•£3

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Key takeaways
Define factors, multiples and prime numbers.
Express a number as a product of its prime factors.
Use a Venn diagram to find the HCF and LCM of two numbers.
Host: Shahriyar is a Maths Teacher at a School in Northwest London, teaching years 7 to 11. He graduated from the University of Warwick in 2013 and set off to China for two years teaching IGCSE and A-Level Economics.

Did you know that prime factorisation is very important to people who try to make (or break) secret codes based on numbers? It's because factoring very large numbers is very hard, and can take computers a long time to do. In this class, students will be guided through what factors, multiples, and prime numbers are as well as how to express a number as a product of its prime factors. Students will also get the get the opportunity to use a Venn diagram to find the HCF and LCM of two numbers. This class is aimed at students in Years 8 - 11 and is a great revision tool!

Check these classes out next!: Drawing Venn Diagrams and Calculating ProbabilityHCFs and LCMsRelative Frequency

Safeguarding reminder:The safety of your child is of the utmost importance. All of our classes are pre-recorded to remove any concerns around live participation. For reruns of our past live classes, students' webcams and microphones were disabled and only the chat history, if participation was requested, is visible.

Suitable for:

This class is suitable for advanced students in Years 8-9 and intermediate students in Years 10-11.

Class requirements:
You will need a laptop or device with internet connection to watch the class, as well as a pen and notepad for taking notes.
What to expect:
• This class will take place online via a Zoom webinar.
• For live classes, please arrive promptly. Students' cameras and microphones are disabled by default.
• For on demand classes, students will be watching a recording of a previous live class.
• Once you have signed up, you will be taken to your dashboard where you can view details of the class, and re-watch it in the future.
• Students will be sent confirmation of the class to their email address if provided.

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