Dice hand; they are thus a crude form of hardware random number generator. Perhaps to mitigate concerns that the pips on the faces of certain styles of dice cause a small bias, casinos use precision dice with flush markings. Common dice are small cubes most commonly across, whose faces are numbered from one to six, usually by patterns of round dots called pips. (While the use of Arabic numerals is occasionally seen, such dice are less common.) Opposite sides of a modern die traditionally add up to seven, implying that the 1, 2 and 3 faces share a vertex. The faces
Dice notation the probability curve towards the higher numbers, as a result a roll of 3 can only occur when all four dice come up 1 (probability 1/1296), while a roll of 18 results if "any" three dice are 6 (probability 21/1296 = 7/432). Rolling three or more dice gives a probability distribution that is approximately Gaussian, in accordance with the central limit theorem. In some games, the above notation is expanded to allow for a multiplier, as in A"d"X"×"C or C"×d"X, where: For example, Multiplication can also mean repeating throws of similar setup (usually represented by the letter, x, rather than