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2. Change-making problem - Wikipedia

   en.wikipedia.org/wiki/Change-making_problem

   Coin values can be modeled by a set of n distinct positive integer values (whole numbers), arranged in increasing order as w 1 through w n.The problem is: given an amount W, also a positive integer, to find a set of non-negative (positive or zero) integers {x 1, x 2, ..., x n}, with each x j representing how often the coin with value w j is used, which minimize the total number of coins f(W)

3. 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.

4. Sheldon coin grading scale - Wikipedia

   en.wikipedia.org/wiki/Sheldon_coin_grading_scale

   Example of an Early American Cent - the coins that inspired Sheldon to create a more precise grading scale. (Courtesy of the National Numismatic Collection, National Museum of American History [photograph by Jaclyn Nash].) The Sheldon Coin Grading Scale is a 70-point coin grading scale used in the numismatic assessment of

5. United States Mint coin sizes - Wikipedia

   en.wikipedia.org/wiki/United_States_Mint_coin_sizes

   In particular, many silver coins changed in the 1870s. [4] The figures cited in the tables are representative of the series, and are generally the latest, or most common, figures for a given coin type. The largest coin ever minted by the US Mint was the 2019 Apollo 50th anniversary 5ounce silver dollar, weighing 155.517 grams, and 76.2 mm in ...

6. Sacagawea dollar - Wikipedia

   en.wikipedia.org/wiki/Sacagawea_dollar

   The new dollar coin was heavily marketed by the Mint in a series of print, radio, and television advertisements, as well as Mint partnerships with Walmart and Cheerios. However, the Sacagawea dollar did not prove popular with the public, and mintage dropped sharply in the second year of production.

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8. United States quarter mintage figures - Wikipedia

   en.wikipedia.org/wiki/United_States_quarter...

   Print/export Download as PDF; Printable version; In other projects ... Proof, all known coins are 7 over 3 overdate errors. (P) 20 [17]

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