6.
It is: 18
The highest common factor of 21 and 18 is 3
36 and 54's highest common factor is 18.
The factors of 18 are:1, 2, 3, 6, 9, 18The factors of 20 are:1, 2, 4, 5, 10, 20The common factors are: 1, 2The Greatest Common Factor (GCF) is: 2
The highest common factor for 18 and 16 is 2.
The greatest common factor of 10 and 18 is 2. The factors of 10 are 1, 2, 5 and 10 The factors of 18 are 1, 2, 3, 6, 9, and 18 So the GCF is 2.
It is 1 but the highest common factor is 18
the highest common factor of the numbers 12, 16 and 18 is 2.
The highest common factor is 9
The highest common factor is 18
The same as the highest common factor of 18 and 12 (where 12 is the remainder of the division of 48 by 18).
18 and 42's highest common factor is six.
The Greatest Common Factor (GCF) is: 18
1
18
It is 3