It's just a simple cube!
Logic
Level
3
Some unit-cubes are assembled to form a larger cube and then some of the faces of this larger cube are painted. After the paint dries, the larger cube is dis-assembled into the unit cubes, and it is found that 45 of these have no paint on any of their faces. How many faces of the larger cube were painted?
by
Satyajit Mohanty