2 numbers have a gcf of 3 = 3 & 6, 6 &9,...
You need at least two numbers. 18 and 36 among others.
6 = 2 x 3 9 = 3 x 3 15 = 3 x 5 GCF = 3
Factors of 4: 1, 2, 4 Factors of 9: 1, 3, 9 Factors of 16: 1, 2, 4, 8, 16 GCF (4, 9, 16) = 1
6and 9
GCF = 3 LCM = 18 Factors of 9: 1, 3, 9 Factors of 6: 1, 2, 3, 6 Multiples of 9: 9, 18 Multiples of 6: 6, 12, 18
The GCF is 3.
The GCF is 6.
The GCF of 9 and 6 is 3.
The Greatest Common Factor of 9, 36, 72: 9
The GCF of 2, 9 and 11 is 1. The LCM is 198.
Example: GCF of 6 and 12= 2 Example 2: GCF of 54 and 6=9 List all the factors of the numbers you use, then if the numbers you have when you list the factors have the same number in both sets of numbers, that is your GCF