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Anonymous
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The GCF is 7.
It is 1
The GCF of 21, 35 is 7.
The GCF is 9.
The GCF of 21 and 42 is 21. The GCF of 17 and 27 is 1.
GCF of 21 and 42: 21GCF of 16 and 25: 1
The GCF is 3.
The GCF is 1.