The GCF is 1.
The GCF of 27 and 30 is 3.
The GCF is 3.
155,3105,2The GCF is 5.The GCF of 10 and 15 is 5.
No matter what you use, you still need at least two numbers to find a GCF.
2 |10,18 , |_________ 5,9 The GCF is 2.
22 11,2 There are no elevens in 60, so the GCF has to be 2.
use division by primes to find the gcf
2 |10,18 , |_________ 5,9 The GCF of 10 and 18 is 2.
The gcf is 3.
The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself. So you do not need to use the division ladder or any other method!
It would only have one rung, since the only common prime factor of 22 and 60 is 2. 2)22,60