Question
PSLE
Ken stacked 9 unit cubes and glued them together to form the solid shown. He painted the whole solid, including the base, white. How many of the 9 cubes had exactly three of their faces painted white?
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PSLE
Ken stacked 9 unit cubes and glued them together to form the solid shown. He painted the whole solid, including the base, white. How many of the 9 cubes had exactly three of their faces painted white?