it has six faces :)
8
Each cube has 6 faces. So 4 cubes together would have 24 faces.
24
It depends on how many cubes in the stack and what shape they form.
It depends on how they are connected, i.e. how many are connected to each other. If they are connected in a line, with just one connection between any two cubes, the rectangle formed still has 6 faces, four of them rectangular (10 of the original 36 cubic faces are hidden between cubes, leaving 26 showing). If the maximum number of faces are connected, with 4 of the cubes as a larger cube and the other two attached together to it, there would be 3 large irregular faces (sides and back), 2 large cubic faces (bottom and front) and 3 rectangular faces (half cubes) as seen from the top. The total would be 8.
Cubes have 6 sides.
9*6 = 54
6
I am assuming that your question states that the top and sides are painted red but the bottom isn't. If so, the answer is:- There are no cubes with 4 faces painted, the most that can be painted is 3 for the ones on the corners. There are 4 corners at the top of the cube that will have their top and 2 sides painted. Therefore there are 4 cubes with 3 painted. The cubes at the corners on the second and third row down will have 2 faces painted, as will the middle cubes on the top row so there are 12 of them in this puzzle. The cube in the middle of each painted face will have just one face painted so this is 5 (assuming the bottom isn't painted). The cubes in the middle of the bottom row will also have one face painted. This brings the total to 9 That is the total of cubes that have paint on them... 4+12+9 = 25 There are 27 cubes in your puzzle so only 2 have no painted faces. The cube right in the middle and the cube in the middle of the bottom layer.
Assuming all faces need to be painted, the question can be written as "how many faces on 43 cubes." There are 6 faces on each cube. Thus the answer can be got from the multiplication 43x6. Doing this gives us 258, so the number of faces that would need to be painted is 258.
Well, each cube have six faces, multiplied by twenty-seven different cubes, equaling one hundred sixty-two (162) sides total.