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what are the highest common factor of 28 and 42

By Emeka Ani on the 7th of October, 2017

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    To get the Greates Common Factor (GCF) of 28 and 42 we need to factor each value first and then we choose all the copies of factors and multiply them:

    28:    2 2   7
    42:    2   3 7
    GCF:    2     7

    The Greates Common Factor (GCF) is:   2 x 7 = 14

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