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  2. Balance puzzle - Wikipedia

    en.wikipedia.org/wiki/Balance_puzzle

    For example, in detecting a dissimilar coin in three weighings (⁠ = ⁠), the maximum number of coins that can be analyzed is ⁠ = ⁠.Note that with ⁠ ⁠ weighings and ⁠ ⁠ coins, it is not always possible to determine the nature of the last coin (whether it is heavier or lighter than the rest), but only that the other coins are all the same, implying that the last coin is the ...

  3. Coinage shapes - Wikipedia

    en.wikipedia.org/wiki/Coinage_shapes

    The Tenpō Tsūhō, a Japanese coin from the 19th-century. Although the vast majority of coins are round, coins are made in a variety of other shapes, including squares, diamonds, hexagons, heptagons, octagons, decagons, and dodecagons. They have also been struck with scalloped (wavy) edges, and with holes in the middle.

  4. Coins of the United States dollar - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_United_States...

    These coins began circulating on February 15, 2007. Starting 2012, these coins have been minted only for collectible sets because of a large stockpile. The Susan B. Anthony dollar coin was minted from 1979 to 1981 and 1999. The 1999 minting was in response to Treasury supplies of the dollar becoming depleted and the inability to accelerate the ...

  5. Coins of the Canadian dollar - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_Canadian_dollar

    In 2004, a "dot cent", as they are sometimes called, sold at auction for $207,000. The one-cent coin was sold again in the Canadiana sale for $400,000, while an example of the ten-cent piece with the dot sold for $184,000. [11] The 25¢ coin, while not as rare as the one-cent and ten-cent pieces, is still a very difficult coin to find.

  6. A Guide Book of United States Coins - Wikipedia

    en.wikipedia.org/wiki/A_Guide_Book_of_United...

    In addition, the Red Book lists commemorative coins, mint sets and proof sets, and bullion coins, as well as significant U.S. pattern coins, private and territorial gold, Hard-times tokens and Civil War tokens. Also listed are Confederate issues, Hawaiian tokens and coins, Philippine issues and Alaskan tokens.

  7. History of coins - Wikipedia

    en.wikipedia.org/wiki/History_of_coins

    Double-die style struck coin from Ancient India, c 304-232 BCE featuring an elephant on one face and a lion on the other. Since that time, coins have been the most universal embodiment of money. These first coins were made of electrum, a naturally occurring pale yellow mixture of gold and silver that was further alloyed with silver and copper.

  8. 2024 MLB Time Capsule: Looking back on everything that ... - AOL

    www.aol.com/sports/2024-mlb-time-capsule-looking...

    Jake Mintz and Jordan Shusterman are joined by Foolish Bailey to take a look back at some of the most unforgettable moments that happened in baseball before, during, and after the 2024 MLB season.

  9. List of Chinese cash coins by inscription - Wikipedia

    en.wikipedia.org/wiki/List_of_Chinese_cash_coins...

    This coins was possibly cast between 1206 and 1227 in Karakorum by Genghis Khan as "大朝" was a name the Mongols gave themselves. The coin is mostly found made from silver although copper variants exist. 支鈔半分 (Zhichao Banfen) Blank: Zhichao Banfen (支鈔半分) could be translated as "Exchange for paper money half a fen [of silver]".

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