Divide by two.
38
2,19
24
12,2
6,2,2
3,2,2,2
38 2,19
38 2,19
24, yes. 38, no.
38 2,19
The GCF of 24 and 38 is 2.
38 19,2
38 2,19
38 2,19
19,2
I can't draw a factor tree here 76 / 2 = 38 38 / 2 = 19 Prime factorization is 2, 2, 19
The GCF is 2.
76{ }2 38{ }2 19