Answer:
The Greast Common Factor of 18 and 72 is 18
Step-by-step explanation:
Factors of 18: 1, 2, 3, 6, 9, 18
Factors of 72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
GCF of 18 and 72 is 18
To find the GCF of two or more numbers
we need two steps
Step 1: List the prime factors of each number.
Step 2: Multiply those factors all numbers have in common. If there are no common prime factors, the GCF is 1.
To find the GCF of 18 and 72
18 = 2 * 3* 3
72 = 2 * 2 * 2 * 3 * 3
Common prime factors 2, 3, 3
Therefore GCF = 2* 3 * 3 = 18
