Brain Teasers
Cube Cutting
Mad Ade has a solid cube of a white material (plastic for example), he coats the outer surface with black paint, then cuts the cube into 125 smaller cubes of the same size and dimensions. How many of the smaller cubes will Mad Ade have with at least 2 black surfaces?
Answer
44, although eight of those will have three black surfaces.Hide Answer Show Answer
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Comments
Who is Mad Ade. Why would sombody name their kid Mad? Are you referring to the Mad-ade who terrorizes teasers on this site?
yep
I found how many had EXACTLY 2 black faces. good one.
There 12 sides and eight corners. The corners are shared by three sides.
12 sides * 5 - 8 corners * 2 = 44
12 sides * 5 - 8 corners * 2 = 44
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