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EEJ MAIN Aptitude QUESTION #11011
Question 1
A $3 \times 3 \times 3$ cube is built from $27$ unit cubes. If the outer layer is removed, how many unit cubes remain?
  • $8$
  • $12$
  • $18$
  • $1$✔️
Correct Answer Explanation
Removing the outer layer from a $3 \times 3 \times 3$ cube leaves a $1 \times 1 \times 1$ inner cube. So only $1$ unit cube remains.