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21 January, 06:33

What is the greatest common factor of 21 40

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  1. 21 January, 08:16
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    The greatest common factor of 21 and 40 is 1
  2. 21 January, 10:24
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    The GCF is 1, their factors are:

    21:1, 3, 7, 21

    40: 1, 2, 5, 8, 10, 20, 40

    The only one they have in common is 1, so 1 is the greatest one.
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