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Question
How many cubes do not have any of their faces painted yellow ?
How many cubes do not have any of their faces painted yellow ?
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Solution
The correct option is D 16
The cubes having at least one face painted yellow are the 10 cubes along the top surface and 10 cubes along he bottom surface i.e. 20 cubes having at least one face painted yellow Thus the number of cubes having none of their faces painted yellow are 36 - 20 = 16
The cubes having at least one face painted yellow are the 10 cubes along the top surface and 10 cubes along he bottom surface i.e. 20 cubes having at least one face painted yellow Thus the number of cubes having none of their faces painted yellow are 36 - 20 = 16
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