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Mathematics 21 Online
OpenStudy (anonymous):

A cube of side 5 cm is painted on all its side. If it is sliced into 1 cu. cm cubes, how many 1 cu. cm cubes will have exactly one of their sides painted?

OpenStudy (anonymous):

25

OpenStudy (agent0smith):

|dw:1355653379322:dw| As you can see, only the inner 3cmx3cm area of each side will have exactly one side painted. The ones around the outer portion either have 2 or 3 sides painted. There's six sides, so the number with one side painted: 6x(3x3)

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