Pablo’s teacher has given him 27 identical white cubes. She asks him to paint some of the faces of these cubes grey and then stack the cubes so that they appear as shown. What is the largest possible number of the individual white cubes which Pablo can leave with no faces painted grey?
Select one option, then click Submit.
8
12
14
15
16
Select an option, then submit.
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Junior Mathematical Challenge 2014 (2014)
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