What is the greatest common factor of 72 and 16 and 24 and 64?
The GCF of 18, 24 and 64 is 2.
To find the GCF of three numbers you first need to break them
down into their prime factors:
18=2x3x3
24=2x2x2x3
64=2x2x2x2x2x2
The next step is to identify the common prime factors. The only
prime factor which all three numbers have is 2. Therefore the GCF
of 18, 24 and 64 is 2.