Question

How many cubes have only one face painted red and all other faces unpainted?

• A. $18$
• B. $27$
• C. $24$
• D. $36$
• E. $12$

Answer 1

The correct option is A $18$

Such cubes are
13(6(102−2)2]=13×54=1813(6(102−2)2]=13×54=18. Hence (a).