View All num of num See all Photos Amazon.com This employer has taken extra steps to respond to reviews and provide job seekers with accurate company information, photos, and reviews. Interested for your company?Learn More. www.amazon.com Employer Engaged Overview Reviews Salaries Interviews Jobs Photos Benefits 4.4k Reviews 11k Salaries 5.7k Interviews 10k Jobs Follow Add Review or Salary Follow Add Review or Salary Interview Question Business Analyst Interview Hyderābād (India) Amazon.com How many smaller cubes are completely invisible in a n*n*n rubic's cube? Tags: See more , See less 8 Answer Add Tags Answer Interview Answer 6 Answers ▲ 1 ▼ n^3- 6n^2The number of cubes are n^3(volume).The number of cubes exposing one or more sides( 6 *( n^2) - all cubes on the sides.)Number of invisible cubes are n^3- 6n^2 . Vivekananda on Jun 7, 2012 ▲ 0 ▼ Isn't the answer none since the question says "completely invisible"? every unit is visible by at least one side so any sub cube (made of these units) has a portion exposed. luis on Jun 13, 2012 ▲ 3 ▼ N*N*N-(N*N*2+N*(N-2)*2+(N-2)*(N-2)*2) ram on Jun 13, 2012 ▲ 11 ▼ (N-2)^3 Sofya on Jun 25, 2012 ▲ 0 ▼ (n-2)^3 you can verify by assuming n=4. Try to visualize invisible cubes and compare it with answers. Raj on Apr 28, 2014 ▲ 1 ▼ (n-2)^3 you can verify by assuming n=4. Try to visualize invisible cubes and compare it with answers. Raj on Apr 28, 2014 Add Answers or Comments To comment on this, Sign In or Sign Up.