1 is the GCF of 4, 9 and 18. 4 and 9 between them have not got a common factor aside from 1. This dictates that 1 is the GCF.
There are no common factors between 10, 9 and 18 aside from 1. You can tell this straight away as 10 and 9 differ by just 1. Thus the GCF is 1.
The greatest common factor of 9, 18 and 38 is 1.
The GCF of 18, 4 and 27 is 1. I saw this straight away as 4 only has factors of 4, 2 and 1. 4 or 2 don't go into 27. Therefore the GCF has to be 1.
The GCF of 6 18 and 4 is 2. This leaves you with 3, 9 and 2 respectively. There are no more factors in common aside from 1.
The GCF, or greatest common factor, of 18 and 63 would be 9.
The GCF of 9, 12, and 18 is 3.
The GCF of 18 and 9 is 9.Since 9 is a factor of 18, it is automatically the GCF.
The GCF is 9.
The GCF of 18, 4 and 27 is 1. I saw this straight away as 4 only has factors of 4, 2 and 1. 4 or 2 don't go into 27. Therefore the GCF has to be 1.
The GCF is 9.
Since 9 is a factor of 18, it is automatically the GCF.
The GCF is 9.
The GCF is 9.
The GCF is 9.
The GCF is 9.
The GCF is 9.
The GCF is 9.
The GCF of 6 18 and 4 is 2. This leaves you with 3, 9 and 2 respectively. There are no more factors in common aside from 1.
The GCF, or greatest common factor, of 18 and 63 would be 9.