Whats the gcf of 48 and 78

The greatest common factor (GCF) of 48 and 78 is: 6

Factors of 48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
Factors of 78: 1, 2, 3, 6, 13, 26, 39

The common factors between the two numbers are 1, 2, 3, and 6, but considering 6 is the highest number out of them, it is the greatest common factor.

We must find prime factoriztion 4 getting GCF 

FACTORS OF 48 : 1,2,3,4,6,8,12,16,24 & 48
FACTORS OF 78 : 1,2,3,6,13,26,39 & 78

WE can see the common factors of 48 and 78 are: 1,2,3 & 6
it means the GCF of 78 & 48 is 6 

What is the last question i don’t see it?