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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. Two-up - Wikipedia

    en.wikipedia.org/wiki/Two-up

    The Australian rock group AC/DC has a song called "Two's Up" on their 1988 Blow Up Your Video album that references the game. In the 1960 film Hell Is a City set in Manchester , England , [ 8 ] there is a scene in which robbers use stolen money to join in a gang of local men gathered on a hill behind the town to gamble "the toss".

  4. Quantum coin flipping - Wikipedia

    en.wikipedia.org/wiki/Quantum_coin_flipping

    The problem of them agreeing on a random bit by exchanging messages over this channel, without relying on any trusted third party, is called the coin flipping problem in cryptography. [1] Quantum coin flipping uses the principles of quantum mechanics to encrypt messages for secure communication.

  5. Penney's game - Wikipedia

    en.wikipedia.org/wiki/Penney's_game

    As this card-based version is quite similar to multiple repetitions of the original coin game, the second player's advantage is greatly amplified. The probabilities are slightly different because the odds for each flip of a coin are independent while the odds of drawing a red or black card each time is dependent on previous draws. Note that HHT ...

  6. 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 ...

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  9. Flipism - Wikipedia

    en.wikipedia.org/wiki/Flipism

    Flipism, sometimes spelled "flippism", is a personal philosophy under which decisions are made by flipping a coin.It originally appeared in the Donald Duck Disney comic "Flip Decision" [1] [2] by Carl Barks, published in 1953.