This is a demonstration of how to find the highest common factor (HCF or GCD) and the lowest common multiple (LCM) of two numbers.
Example 1. Find the HCF and LCM of 72 and 96:
You can vary the speed using this slider:
HCF & LCM Calculator
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This method is sometimes known as the Indian Method
Many people know the highest common factor as the greatest common divisor and use the abbreviation GCD instead of HCF.
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