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
Icon (Ice Cube album) Icon (Ice Cube album) Icon is a Compilation album by American hip hop artist, Ice Cube. Consisting of songs from previous albums such as AmeriKKKa's Most Wanted, The Predator (Ice Cube album), War & Peace Vol. 1 (The War Disc), War & Peace Vol. 2 (The Peace Disc), Lethal Injection (album), and Death Certificate (album), it contains classic hits including It Was a Good Day, Steady Mobbin', and Check Yo Self. The collection, which includes 11 songs, is essentially a repackaged version of Ice Cube's 10 Great Songs album with the addition of "What Can I Do"? Released in 2013,