I regret that there is no such thing as "the greatest common w".
W is.
The GCF is W.
The answer depends on the values of W, Y and w. Without further information, all that can be said is that the greatest common factor is 1.
You need at least two things to find something in common between them.
That depends on the numerical value of W.
That depends on the numerical value of W.
That would depend on the value of W.
W(1 + 1)
That depends on the numerical value of W.
That depends on the numerical value of W.
Eleven. w
That depends on the numerical value of W.