Nany L.

asked • 09/02/16

suppose a 3×3×3 cube is painted red then divided into twenty-seven 1×1×1 cubes.

a) how many of the 27 smaller cubes are coloured red on three faces?

Nathan B.

Eight cubes. If you look at a cube, you're going to have either face, edge, corner, or center sections. A face will only have 1 side colored, edges will have 2 sides, corners will have 3 sides, and the center area will have none. So if we count the number of corners, a cube has eight of them.
 
 
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09/02/16

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