If you arrange three identical regular cubes in a straight line, touching face-to-face, the resulting rectangular prism has a certain number of exposed square faces. If you instead stack those same three cubes vertically into a tower, how many exposed square faces does the tower have?
14
A single cube has 6 faces. Three independent cubes have 18 faces total. In either configuration (a line of three or a tower of three), the cubes are joined at 2 internal connection points, each hiding 2 square faces (1 from each touching cube), meaning 4 faces are hidden in total. 18 - 4 = 14 exposed faces for both shapes.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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