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7 August, 09:06

Find GCF of 24 and 21

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Answers (2)
  1. 7 August, 09:17
    0
    The greatest common factor of 24 and 21 is 3

    3x8=24 and 3x7=21
  2. 7 August, 09:28
    0
    Good night,

    To find the GCF of several numbers the first thing you have to do is decompose the numbers, so:

    24 | 2

    12 | 2

    6 | 2

    3 | 3

    1

    24 = 2 x 2 x 2 x3

    24 = 2³ x 3

    21 | 3

    7 | 7

    1

    21 = 7 x 3

    GCF = common factors with the lowest exponents

    GCF = 3
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