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  2. 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 ...

  3. 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 ...

  4. St. Petersburg paradox - Wikipedia

    en.wikipedia.org/wiki/St._Petersburg_paradox

    The St. Petersburg paradox or St. Petersburg lottery [1] is a paradox involving the game of flipping a coin where the expected payoff of the lottery game is infinite but nevertheless seems to be worth only a very small amount to the participants. The St. Petersburg paradox is a situation where a naïve decision criterion that takes only the ...

  5. Martingale (betting system) - Wikipedia

    en.wikipedia.org/wiki/Martingale_(betting_system)

    A martingale is a class of betting strategies that originated from and were popular in 18th-century France.The simplest of these strategies was designed for a game in which the gambler wins the stake if a coin comes up heads and loses if it comes up tails.

  6. List of Google Easter eggs - Wikipedia

    en.wikipedia.org/wiki/List_of_Google_Easter_eggs

    "hip hop" shows a bouncing radio in the knowledge graph, which when clicked will show a doodle celebrating the 44th anniversary of hip hop. holi" shows a picture of bowls of colored powder in the Knowledge Graph which, when clicked, will simulate throwing a gob of powder at the page where clicked. Further clicks on the page will simulate ...

  7. 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 ...

  8. Coin flipping - Wikipedia

    en.wikipedia.org/wiki/Coin_flipping

    The coin toss in cricket is more important than in other games because in many situations it can lead a team winning or losing the game. Factors such as pitch conditions, weather and the time of day are considered by the team captain who wins the toss. Now there are websites such as flip a coin online which domestic sports team use to toss the ...

  9. Skip list - Wikipedia

    en.wikipedia.org/wiki/Skip_list

    Just flip a coin once to decide whether to promote only the even ones or only the odd ones. Instead of (⁡) coin flips, there would only be (⁡) of them. Unfortunately, this gives the adversarial user a 50/50 chance of being correct upon guessing that all of the even numbered nodes (among the ones at level 1 or higher) are higher than level one.