Question

What's the greatest common factor of 48 and 78

Answer 1

To get the greatest common factor of 48 and 78 we need to factor each value first and then we choose all the copies of factors and multiply them.

48:22223
78:2       313
The greatest common factor is 2x3=6

Answer 2

Greatest common factor.    48 and 78

2   /     48     78              2 into 48 and 78    you have 24 and 39
3    /     24     39             3 into 24 and 39    you have 8 and 13
     /       8      13             No number can go again into both

GCF  =  2 * 3 = 6