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
What are the first five multiples of 3
3,6,9,12,15
GCF of 20 and 5
What is 5?
Find the greatest common factor of 2, 5, and 10.
What is 1?
GCF of 30 and 40
What is 10?
List all factors for 44
1,2,4,11,22,44
What are the first 6 multiples of 7
7,14,21,28,35,42,49
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
What are the first six multiples of 9
9,18,27,36,45,54,63
GCF of 81 and 108
What is 27
Find the greatest common factor of 5, 2, and 3.
What is 1?
GCF of 30 and 60
What is 30?
List all factors of 64
What is are the common multiples of 6 & 8
What are 24,48,72
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
What are the common multiples of 12 & 10
What is 60 and 120