GCF 1
When two numbers have a factor in common and it's the greatest factor
GCF
Find the greatest common factor of 42, 14, and 4.
What is 2?
GCF of 12 and 18
What is 6?
List all factors of 16
1,16,4,4,2,8
35, 56, and 63
7
GCF of 20 and 5
What is 5?
Find the greatest common factor of 2, 5, and 10.
What is 1?
GCF of 60 and 100
What is 20?
List all factors for 44
1,2,4,11,22,44
30, 60, and 78
6
GCF of 72 and 8
What is 8?
Find the greatest common factor of 12, 14, and 4.
What is 2?
GCF of 81 and 45
What is 9?
List all factors of 50
1,50,2,25,5,10
18, 54, and 90
18
GCF of 81 and 108
What is 27
Find the greatest common factor of 5, 2, and 3.
What is 1?
GCF of 48 and 96
What is 48?
List all factors of 64
96, 120, and 156
12
GCF of 22 and 66
What is 22?
Find the greatest common factor of 8, 12, and 28.
What is 4?
GCF of 64 and 80
What is 16?
List all factors of 72
1,2,3,4,6,8,9,12,18,24,36,72
9, 99, and 181
1