The GCF is 15.
The GCF for 15 30 45 is 15.The GCF is 15.It is: 15
GCF(30, 50) = 10.
The GCF of (-15) and 50 = 1
The GCF is 5.
Well, let's take a look at these numbers, friend. The greatest common factor of 15 and 30 is 15. You see, the greatest common factor is the largest number that divides evenly into both of these numbers, like a happy little bridge connecting them together.
The GCF is 10.
The GCF of 50 and 30 is 10. (I believe you meant to ask "What ?" instead of "Why ?".)
The GCF of 30, 50, 20 is 10.
The GCF is 15.
The greatest common factor (GCF) of 15, 30, 90 is 15.
The GCF is 15.