Answer :

iGreen
The GCF of 24 and 48 is 24.

48 / 24 = 2
24 / 24 = 1
24: 1, 2, 3, 4, 6, 8, 12, 24
48m: 1, 2, 3, 4, 6, 8 12, 24, 48, m
GCF: 24