Question

How many cubes will have only two surfaces painted with red and blue colour respectively ?

• A. $8$
• B. $12$
• C. $24$
• D. $30$

Answer 1

Answer: (B)

$12$

Total number of smaller cubes $4\times 4\times 4=64$
Number of cubes at one edge with only 2 faces painted with red and blue $=3$
Number of such edges $=4$
So, Total number of cubes $=3\times 4=12$
Hence, the correct answer is (B).