what is the greatest common factor (GCF) of 9 and 18?
least common multiple of 5 and 9
The greatest common factor (GCF) of 9 and 18 is 9.
The least common multiple (LCM) of 5 and 9 is 45.
To find the greatest common factor (GCF) of two numbers, you can start by listing all the factors of each number and then identifying the largest factor that is common to both numbers.
For the number 9, the factors are 1, 3, and 9.
For the number 18, the factors are 1, 2, 3, 6, 9, and 18.
To find their common factors, we observe that both 9 and 18 have the common factors of 1 and 3.
Since we are looking for the greatest common factor, the largest common factor between 9 and 18 is 3.
So, the greatest common factor (GCF) of 9 and 18 is 3.