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  2. Lottery machine - Wikipedia

    en.wikipedia.org/wiki/Lottery_machine

    A lottery machine is the machine used to draw the winning numbers for a lottery. Early lotteries were done by drawing numbers, or winning tickets, from a container. In the UK, numbers of winning Premium Bonds (which were not strictly a lottery, but very similar in approach) were generated by an electronic machine called ERNIE.

  3. Lottery wheeling - Wikipedia

    en.wikipedia.org/wiki/Lottery_wheeling

    A key number wheel (or power number wheel) is a wheel in which one or more numbers (called key numbers or power numbers) appear in every combination of the wheel. Example: Pick 5, 7 numbers wheel, with 2 key numbers (1 and 2), 2 if 2 and 3 if 4 for the full set and 4 if 5 for the filtered set:

  4. List coloring - Wikipedia

    en.wikipedia.org/wiki/List_coloring

    The choosability (or list colorability or list chromatic number) ch(G) of a graph G is the least number k such that G is k-choosable. More generally, for a function f assigning a positive integer f ( v ) to each vertex v , a graph G is f -choosable (or f -list-colorable ) if it has a list coloring no matter how one assigns a list of f ( v ...

  5. Roulette - Wikipedia

    en.wikipedia.org/wiki/Roulette

    Roulette (named after the French word meaning "little wheel") is a casino game which was likely developed from the Italian game Biribi. In the game, a player may choose to place a bet on a single number, various groupings of numbers, the color red or black, whether the number is odd or even, or if the number is high or low.

  6. Random number generation - Wikipedia

    en.wikipedia.org/wiki/Random_number_generation

    Dice are an example of a mechanical hardware random number generator. When a cubical die is rolled, a random number from 1 to 6 is obtained. Random number generation is a process by which, often by means of a random number generator (RNG), a sequence of numbers or symbols is generated that cannot be reasonably predicted better than by random chance.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Color triangle - Wikipedia

    en.wikipedia.org/wiki/Color_triangle

    Initially, he compared the color he observed on the spinning top with a paper of different color, in order to find a match. Later, he mounted a pair of papers, snow white (SW) and ivory black (Bk), in an inner circle, thereby creating shades of gray. By adjusting the ratio of primaries, he matched the observed gray of the inner wheel, for ...

  9. Domain coloring - Wikipedia

    en.wikipedia.org/wiki/Domain_coloring

    Domain coloring plot of the function f(x) = ⁠ (x 2 − 1)(x − 2 − i) 2 / x 2 + 2 + 2i ⁠, using the structured color function described below. In complex analysis, domain coloring or a color wheel graph is a technique for visualizing complex functions by assigning a color to each point of the complex plane. By assigning points on the ...