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  2. Coin flipping - Wikipedia

    en.wikipedia.org/wiki/Coin_flipping

    To choose one out of three, the previous is either reversed (the odd coin out is the winner) or a regular two-way coin flip between the two remaining players can decide. The three-way flip is 75% likely to work each time it is tried (if all coins are heads or all are tails, each of which occur 1/8 of the time due to the chances being 0.5 by 0.5 ...

  3. Mint-made errors - Wikipedia

    en.wikipedia.org/wiki/Mint-made_errors

    A uni-face coin results when two planchets are stacked one atop the other at the time of striking. This produces two coins: one with only an obverse image, and a second with only the reverse image. The planchets may be centered over the die producing one complete image on each coin or off-centered producing partial images on each side.

  4. Flipping Rare Coins: A Profitable Side Hustle for Coin ... - AOL

    www.aol.com/flipping-rare-coins-profitable-side...

    For instance, not every coin minted in the 1930s will fetch you what a 1933 Double Eagle will as only one of these coins was available for private ownership and it sold for $18.9 million in a 2021 ...

  5. Fair coin - Wikipedia

    en.wikipedia.org/wiki/Fair_coin

    If a cheat has altered a coin to prefer one side over another (a biased coin), the coin can still be used for fair results by changing the game slightly. John von Neumann gave the following procedure: [4] Toss the coin twice. If the results match, start over, forgetting both results. If the results differ, use the first result, forgetting the ...

  6. Dice - Wikipedia

    en.wikipedia.org/wiki/Dice

    A coin flip. Some coins with 1 marked on one side and 2 on the other are available, but most simply use a common coin. 3 Rounded-off triangular prism: A long die intended to be rolled lengthwise. When the die is rolled, one edge (rather than a side) appears facing upwards. On either side of each edge the same number is printed (from 1 to 3).

  7. Coin rotation paradox - Wikipedia

    en.wikipedia.org/wiki/Coin_rotation_paradox

    The outer coin makes two rotations rolling once around the inner coin. The path of a single point on the edge of the moving coin is a cardioid.. The coin rotation paradox is the counter-intuitive math problem that, when one coin is rolled around the rim of another coin of equal size, the moving coin completes not one but two full rotations after going all the way around the stationary coin ...

  8. Category:Coin flipping - Wikipedia

    en.wikipedia.org/wiki/Category:Coin_flipping

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