Cube (algebra) however, easy to show that most numbers are not perfect cubes because "all" perfect cubes must have digital root 1, 8 or 9. That is their values modulo 9 may be only −1, 1 and 0. Moreover, the digital root of any number's cube can be determined by the remainder the number gives when divided by 3: Every positive integer can be written as the sum of nine (or fewer) positive cubes. This upper limit of nine cubes cannot be reduced because, for example, 23 cannot be written as the sum of fewer than nine positive cubes: The equation has
The Cube (film) anything behind. When the Man states that if he re-enters his Cube where he won't get out again, Watson ranted about having to depend on the squares. Watson decides to go back to his Cube. When Mr. Thomas enters asking if someone else was in his Cube, the Man states that there was a visitor. Mr. Thomas states that other visitor was acting and introduces him to Jack Van Evera who asks Mr. Thomas if they can take out the part about the thumbnails. As they leave, Jack asks Mr. Thomas what the rest of these Cubes are for anyway.