GCF(83, 100) = 1. The numbers are coprime.
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The GCF is 1.
The GCF is 1.
83 is a prime number so the prime factorisation of 83 is 1*83 Therefore the only possible GCF is 1 or 83. But, 83 > 55 so 83 cannot be a factor of 55. Consequently, the only possible common factor is 1. And since 1 is a GCF of all numbers, that is their GCF.
The GCF is: 5
100 and 200 have a GCF of 100.