Jill has some unit cubes which are all black, grey, or white. She uses 27 of them to build a cube. She wants the surface to be exactly one-third black, one-third grey, and one-third white. The smallest possible number of black cubes she can use is X and the largest possible number of black cubes she can use is Y. What is the value of ?
Select one option, then click Submit.
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Select an option, then submit.
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