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26 September, 13:45

What is the greatest common factor of 9 21 60?

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  1. 26 September, 17:27
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    The greatest common factor (GCF) of 9, 21 and 60 is: 3

    Factors of 9: 1, 3, 9

    Factors of 21: 1, 3, 7

    Factors of 60: 1, 2, 3, 4, 5, 6

    The common factors between the three numbers are 1 and 3, but since 3 is the highest number, it is considered the GCF.
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