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
Cube (collectible card game variation) constructed to be played like a non-collectible customizable card game or ECG (Expandable Card Game), also known as a Living Card Game (LCG). A cube's construction is done with a focus on what type of metagame is desired. Cube (collectible card game variation) A Cube is a variation of gameplay for collectible card games. It is a player-made set of at least 360 cards created for the purposes of drafting, though as many as 720 can be used. Booster packs are simulated from the contents of the cube and are used to draft cards for play. A cube typically accommodates