Basically factorise 255 and 256 separately.
i.e. what prime numbers multiply together to give you 255 first
5 divides in (which is prime) to give you 51
then 51/3 =17
i.e. 5,3,17 = factors of 255
and 2,2,2,2,2,2,2,2 are factors of 256.
The answer is 1 because you cant multiply 5,3 and 17 to give you an even number which is all you can get by multiply 2,2,2 etc.
Thus ANSWER Is 1
The GCF of 255 and 256 is 1.
The greatest common factor of 286 and 251 is 1.
The GCF of 256 and 352 is 32
It is 64
It is: 4
It is: 16
The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.The greatest common factor of 384 and 512 is 128
The GCF is 16.
The GCF is 8.
The GCF is 16.
Common factors of 286 and 242 are: 1, 2, 11, and 22.
The greatest common factor (GCF) of 640 and 256 is 128.