painted pink and then cut

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sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members; Location: India; Thanked: 267 times; GMAT Score:760

by sanju09 » Fri Jul 23, 2010 3:29 am

A solid cube of side 6 is first painted pink and then cut into smaller cubes of side 2. How many of the smaller cubes have paint on exactly 2 sides?
A. 30
B. 24
C. 12
D. 8
E. 6

[spoiler]Source: majortests.com[/spoiler]

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Source: Beat The GMAT — Problem Solving | Fri Jul 23, 2010 3:29 am

kvcpk: Legendary Member; Posts: 1893; Joined: Sun May 30, 2010 11:48 pmFollowed by: 7 members; Thanked: 215 times

by kvcpk » Fri Jul 23, 2010 3:32 am

All the cubes ont he middle of edges are painted on 2 sides.

front face has 4.
back face has 4
one side has 2
other side has 2.

total 12.

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