Your answer is 6 because 6 is the smallest number that is divisible by both 2 and 3
If the side lengths of B are 2x as long as the side lengths of A then the volume of B should be the volume of A^2
216^2=46,656
46,656-216=46,440
This can be more easily displayed with smaller numbers
If cube X were 2*2*2 then the volume would be 8
If cube Y were 4*4*4 then the volume would be 64
8(volume of cube X)^2=64(volume of cube Y)
Yes they can all have the same
Check the attachment for the answers. Click on it again to make it bigger.