Medium
A cube of side 3 centimeters is painted and divided into smaller cubes of side 1 centimeter. Number of cubes with 3 faces painted is:
Explanation
Explanation
In a 3x3x3 cube, the 8 corner cubes each touch three outer faces of the large cube, so they have exactly 3 painted faces.
PRO TIP
Re-check your working by substituting the answer back into the original question.