Answer :
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.
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.
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 .
