2005 Alabama ARML TST Problems/Problem 2
Revision as of 17:15, 17 November 2006 by JBL (talk | contribs) (2005 Alabama ARML TST/Problem 2 moved to 2005 Alabama ARML TST Problems/Problem 2)
Problem
A large cube is painted green and then chopped up into 64 smaller congruent cubes. How many of the smaller cubes have at least one face painted green?
Solution
The cube is 4x4x4. Only the inside subcubes are unpainted, thus all but 8 are unpainted, leaving 64-8=56 painted.
