The Greatest Common Factor of four is four. This is because the highest number that can be multiplied by another number to make four (the factor), is four. When four is multiplied by one, it makes four. Even though two multiplied by two makes four, it is not the highest/greatest number that can be multiplied to make four.
Since 32 is a factor of 256, it is automatically the GCF.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.The GCF is 4.
Since 4 is a factor of 20, it is automatically the GCF.
The GCF is 4.
The GCF is 4.
The GCF is 4.