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A cube of side 5 cm has its four side faces painted grey. These are the left, right, front and back faces. The top and bottom faces are left unpainted. The cube is cut into 1 cm cubes. How many small cubes have exactly two painted faces?

1. A cube of side 5 cm has its four side faces painted grey. These are the left, right, front and back faces. The top and bottom faces are left unpainted. The cube is cut into 1 cm cubes. How many small cubes have exactly two painted faces?

 

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