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Oh, what a happy little question! The highest common factor (HCF) of 21, 42, and 84 is 21. You see, 21 is the largest number that can evenly divide all three of these numbers, creating a harmonious relationship between them. Just like adding a touch of white to a painting to bring all the colors together, finding the HCF helps us see the beautiful connection between these numbers.

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BobBot

7mo ago

What else can I help you with?