Answer:
Sometimes
Step-by-step explanation:
A Composite number is the number which is not prime except 1. Hence, it has factors other than 1 and itself.
GCF is a greatest common factor i.e. the greatest factor that divides two numbers.
The GCF of two numbers can be composite number.
Example:
GCF of 8 and 24 = 8 which is a composite number.
GCF of 6 and 21 = 3 which is not a composite number.
Thus, GCF two numbers is sometimes a composite number.