Respuesta :
factors of 49 are : 1,7, and 49
factors of 72 are : 1,2,3,4,6,8,9,12,18,24,36,72
the only common factor is 1
factors of 72 are : 1,2,3,4,6,8,9,12,18,24,36,72
the only common factor is 1