Respuesta :
factors of 9: 1, 3, 9
factors of 63: 1, 3, 7, 9, 21, 63
factors of 27: 1, 3, 9, 27
The greatest factor that all of these numbers have in common is 9.
factors of 63: 1, 3, 7, 9, 21, 63
factors of 27: 1, 3, 9, 27
The greatest factor that all of these numbers have in common is 9.