8
They are both 3 dimensional shapes having surface area and volume.
Put all the cubes in a line.
8, one for each corner; all cubes are rectangular.
NO
All of them are.
The reason for prisims is... think about it! Would it be easy to stack spheres?
A rectangular prism that is 4 cubes by 2 cubes is made up of 8 cubes.
Yes; just as all squares are rectangles, all cubes are rectangular prisms.
Cubes have a square on each side, but rectangular prisms have rectangles or squares.
There is no limit to the number of cubes which can be arranged on top of a rectangular prism.
No it is not