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More answers

The GCF is 7.

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Wiki User

9y ago
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GCF (28, 14, 21) = 7

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Wiki User

12y ago
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The GCF is 7.

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Wiki User

9y ago
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7

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Wiki User

16y ago
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G Zav Pro

Lvl 1
3y ago
this is stupid

7

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Wiki User

13y ago
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7

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Wiki User

15y ago
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7 is.

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Wiki User

12y ago
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Q: What is the greatest common factor of 28 and 14 and 21?
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