The greatest common factor of 54 and 72 is 18.
Method 1: Listing Factors
List all the factors of both numbers and the highest factor that is the same is the greatest common factor.
Factors of 54: 1, 2, 3, 6, 9, 18, 27
Factors of 72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 36
The greatest common factor is 18.
Method 2: Prime Factorization
Find the prime factorization of each number. The prime numbers that the numbers all share multiply to the great common factor.
54=2*3*3*3
72=2*2*2*3*3
2*3*3=18
54 and 72 share one 2 and two 3's. Therefore, the greatest common factor is 18.
It is 18
The greatest common factor of 54 and 72 is 18.
The Greatest Common Factor is 6
18
GCF(36, 54, 72) = 18.
The GCF is 18.
The GCF is 6.
It is 18
The GCF is 9.
The GCF is 18.
12
The greatest common factor of 24 54 and 72 is 6.
6