Question

What is the difference between the number of faces in a cube and a cuboid?

Answer 1

There are six(Front, Back, Left side, Right side, Top and Bottom) square faces in a cube as we can see here.

There are six(Front, Back, Left side, Right side, Top and Bottom) faces in a cuboid as we can see here.
A cuboid can have either 4 rectangular faces and 2 square faces or all 6 rectangular faces.

Therefore the difference between the number of faces = 6 - 6
= 0