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Anonymous
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13, 23 & 37 are all prime numbers which means that their factors are 1 and themselves only.
Thus, their common factor is 1.
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1 37 , 12THE GCF is 1.
The gcf is 1.The GCF is 1.
The GCF is 74.
The GCF is: 37
The gcf of 37 and 81 is 1 (their only common factor)