Question

A solid rectangular block is formed by gluing together N congruent 1-cm cubes face to face. When the block is viewed so that three of its faces are visible, exactly 231 of the 1-cm cubes cannot be seen. Find the smallest possible value of N.

Answer 1

462

Step-by-step explanation:

231 cubes= half of N (because only 3 of the faces are visible, there are 6 faces altogether)

N=462