Respuesta :

7 and 19 are both prime numbers.
 
Factors of 7
1 * 7 = 7
7 * 1 = 7
factors are 1 and 7

Factors of 19
1 * 19 = 19
19 * 1 = 19
factors are 1 and 19

GCF = greater common factor
So GCF is 1 because there is no greater common number in the 7 and 19

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