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  2. Coin flipping - Wikipedia

    en.wikipedia.org/wiki/Coin_flipping

    Coin flipping, coin tossing, or heads or tails is the practice of throwing a coin in the air and checking which side is showing when it lands, in order to randomly choose between two alternatives. It is a form of sortition which inherently has two possible outcomes.

  3. Obverse and reverse - Wikipedia

    en.wikipedia.org/wiki/Obverse_and_reverse

    Roman imperial coin, struck c. 241, with the head of Tranquillina on the obverse, or front of the coin, and her marriage to Gordian III depicted on the reverse, or back side of the coin, in smaller scale; the coin exhibits the obverse – "head", or front – and reverse – "tail", or back – convention that still dominates much coinage today.

  4. Coining (mint) - Wikipedia

    en.wikipedia.org/wiki/Coining_(mint)

    In the United States, coins are typically minted head to tail; that means the "top" of one side of the coin is on the exact opposite side of the coin as the "bottom" of the other, resulting in the coin's features being presented right side up when the coin is rotated on a horizontal axis. This is called a "coin turn" alignment.

  5. Liberty Head nickel - Wikipedia

    en.wikipedia.org/wiki/Liberty_Head_nickel

    The Liberty Head nickel, sometimes referred to as the V nickel because of its reverse (or tails) design, is an American five-cent piece. It was struck for circulation from 1883 until 1912, with at least five pieces being surreptitiously struck dated 1913. The obverse features a left-facing image of the goddess of Liberty.

  6. Penney's game - Wikipedia

    en.wikipedia.org/wiki/Penney's_game

    Penney's game, named after its inventor Walter Penney, is a binary (head/tail) sequence generating game between two players. Player A selects a sequence of heads and tails (of length 3 or larger), and shows this sequence to player B. Player B then selects another sequence of heads and tails of the same length.

  7. Are Blank Coins Valuable? If You Can Find One, It Could Be ...

    www.aol.com/finance/blank-coins-valuable-one...

    The most valuable blank coin listed on the U.S. Coins Guide site is a 90% silver dollar without a raised rim valued at $1,600 or more. The same type of silver dollar with a raised rim is valued at ...

  8. Mercury dime - Wikipedia

    en.wikipedia.org/wiki/Mercury_dime

    The Mercury dime is a ten-cent coin struck by the United States Mint from late 1916 to 1945. Designed by Adolph Weinman and also referred to as the Winged Liberty Head dime, it gained its common name because the obverse depiction of a young Liberty, identifiable by her winged Phrygian cap, was confused with the Roman god Mercury.

  9. 10 of the Most Valuable Pennies - AOL

    www.aol.com/10-most-valuable-pennies-225129622.html

    More than 600 of these coins were given to politicians and others during the original minting, but additional coins were re-struck from the original dies in 1858 and 1859. These coins can range in ...

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