How to find the Highest Common Factor

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*** WHAT'S COVERED ***
1. Defining the Highest Common Factor (HCF).
2. Finding the HCF by listing factors of two numbers.
3. Finding the HCF using prime factorisation.
* Identifying common prime factors from the lists.
* How to handle prime factors that appear multiple times.

*** EXAM BOARD INFO ***
Suitable for courses across the world.
In the UK:
KS3 - Only need to know the first method (up to 1:55)
GCSE Foundation - Only need to know the first method (up to 1:55)
GCSE Higher - All suitable

*** CHAPTERS ***
0:00 Introduction to Highest Common Factor (HCF)
0:26 Method 1: Listing Factors
1:09 Listing Factors Practice: 12 and 18
1:56 Method 2: Using Prime Factors
2:40 Prime Factors - Handling Repeated Factors
3:15 Prime Factors Practice: 28 and 42
3:57 Prime Factors Practice: 132 and 420

*** PLAYLISTS ***










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