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26 October, 13:46

What is the greatest common factor of 21 and 27?

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  1. 26 October, 14:09
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    Answer: 3

    Step-by-step explanation: We found the factors and prime factorization of 21 and 27. The biggest common factor number is the GCF number. So the greatest common factor 21 and 27 is 3.
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