Question 53151
Factors of 14: 2,7
Factors of 18: 2,3,3.
Factors of 4: 2
Highlight common factors:
14: 2,7
18: 2,3,3
Common factors: 2
The product of these common factors is:2=2.
This number, 2, is your greatest common factor:

Greatest Common Factor( 2,14, 18 ) = 2.