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23 September, 23:57

Find the GCF of 21, 30

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Answers (2)
  1. 24 September, 00:05
    0
    3

    Step-by-step explanation:

    Factors of 21: 1, 3, 7, 21

    Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

    The GCF is the largest factor they both have.

    GCF = 3
  2. 24 September, 00:18
    0
    The GCF of 21 and 30 is 3.

    Step-by-step explanation:

    Find the prime factorization of 21

    21 = 3 * 7

    Find the prime factorization of 30

    30 = 2 * 3 * 5

    To find the gcf, multiply all the prime factors common to both numbers:

    Therefore, GCF = 3
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