Question

I need help with finding the GCF (greatest common factor) of 72,48

Answer 1

The factors of  72  are  1,  2,  3,  4,  6,  8,  9,  12,  18,  24,  36, and  72 .

The factors of  48  are  1,  2,  3,  4,  6,  8,  12,  16,  24, and  48 .

The factors common to both  72  and  48  are  1,  2,  3,  4,  6,  8,  12, and  24 .

The greatest one of those is  24 . 

Answer 2

First, find all the factors of the two numbers (separately):
72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72
48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
The numbers in bold are factors of both 72 and 48.
Find the greatest one (out of the numbers in bold). 24 is the GCF.