G S Rehill's Interactive Maths Software Series - "Building a Strong Foundation in Mathematics" from mathsteacher.com.au.

 

Year 7 Interactive Maths - Second Edition


Highest Common Factor

The largest common factor of two or more numbers is called the highest common factor (HCF).

The common factors of 8 and 12 are in bold.  So, the highest common factor is 4.


Setting out:

Often, we set out the solution as follows:

The HCF of 8 and 12 is 4.


Example 9

Find the highest common factor of 14 and 28.

Solution:

List the factors of 14 and 28.

The HCF of 14 and 28 is 14.


Key Terms

highest common factor, HCF

 

Study Another Topic in Chapter 3: Multiples and Factors

Multiples ] Common Multiples ] Lowest Common Multiple ] Factors ] Common Factors ] [ Highest Common Factor ] Prime Numbers ] Problem Solving Unit ] Projects ] Symbols ] Index ]

 

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