1
The factor pairs of 100 are 1 and 100, 2 and 50, 4 and 25, 5 and 20, and 10 and 10.
The factor pairs of 49 are 1 and 49, and 7 and 7.
Since the only factor they share is 1, 1 is their greatest common factor.
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The greatest common factor of 49 and 343 is 49.
The greatest common factor of 2135 , 49 = 7
The greatest common factor of 28 and 49 is 7.
49 is.
The GCF is 1.