To find the GCF, we can first find the factors of each number:
24: 1, 2, 3, 4, 6, 8, 12, 24
8: 1, 2, 4, 8
16: 1, 2, 4, 8, 16
The common factors of 24, 8, and 16 are 1, 2, 4, and 8.
The GCF is the largest of the common factors, which is 8.