It is 7
The GCF is 7.
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The greatest common factor of 42, 49 and 84 is 7.
A factor is a number that divides into another number. Factors of 19 are 1 and 19. Factors of 49 are 1, 7, and 49. Therefore, 1 is the greatest common factor.
7
It is 9
The greatest common factor of 14 and 49 is 7.