In a solid cube made up of 27 small cubes, two opposite sides are painted red, two opposite sides yellow and two other sides white. How many small cubes have the colors yellow and white alone in them?

On the basis of above given question , we can say that
The cubes of middle row will have no red colour ? 9 Cubes
The Central cube will have no colour
Now, out of 8 cubes, 4 cubes have either yellow or white colour.