1 and 5
5, 10 10, 15 5, 15
10 and 15
You need at least two numbers to find a GCF.
When you are trying to find the GCF of two numbers and one of the numbers is a multiple of the other, the GCF will be the smaller of the two numbers. The GCF of 3 and 9 is 3.
The GCF is 1.
Factors of 54: 1, 2, 3, 6, 9, 18, 27, 54Factors of 10: 1, 2, 5, 10Factors of 15: 1, 3, 5, 15GCF (54, 10, 15) = 1
The GCF is 5.
15, 30 and 45 have a GCF of 15.
The GCF is 5.
The GCF is 5.
5, 10, 15, 20, 25, 30
Since 15 is a factor of 45, it is automatically the GCF.