Answer:
8
15
Step-by-step explanation:
To find the GCF of numbers, first find the prime factorizations of the numbers. The GCF is the product of common factors with lowest exponent.
GCF (16, 24)
16 = 2^4
24 = 2^3 * 3
GCF = 2^3 = 8
GCF (15, 45, 60)
15 = 3 * 5
45 = 3^3 * 5
60 = 2^2 * 3 * 5
GCF = 3 * 5 = 15
