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2. Change-making problem - Wikipedia

   en.wikipedia.org/wiki/Change-making_problem

   Change-making problem. The change-making problem addresses the question of finding the minimum number of coins (of certain denominations) that add up to a given amount of money. It is a special case of the integer knapsack problem, and has applications wider than just currency. It is also the most common variation of the coin change problem, a ...

3. Sovereign (British coin) - Wikipedia

   en.wikipedia.org/wiki/Sovereign_(British_coin)

   The sovereign is a British gold coin with a nominal value of one pound sterling (£1) and contains 0.2354 troy oz of pure gold. Struck since 1817, it was originally a circulating coin that was accepted in Britain and elsewhere in the world; it is now a bullion coin and is sometimes mounted in jewellery. In addition, circulation strikes and ...

4. American Arts Commemorative Series medallions - Wikipedia

   en.wikipedia.org/wiki/American_Arts...

   American Arts Commemorative Series medallions. A 1980 Grant Wood one ounce gold medallion. American Arts Commemorative Series Medallions are a series of ten gold bullion medallions that were produced by the United States Mint from 1980 to 1984. They were sold to compete with the South African Krugerrand and other bullion coins.

5. US Presidential Dollar Coins Worth the Most Money — You Could ...

   www.aol.com/us-presidential-dollar-coins-worth...

   The composition of the Presidential Dollar coins is identical to that of the Sacagawea Golden Dollar and Native American $1 coins. Find: 10 Rare Roosevelt Dimes Worth a Lot of Money

6. Penny (United States coin) - Wikipedia

   en.wikipedia.org/wiki/Penny_(United_States_coin)

   Penny (United States coin) The cent, the United States of America one-cent coin (symbol: ¢), often called the " penny ", is a unit of currency equaling one-hundredth of a United States of America dollar. It has been the lowest face-value physical unit of U.S. currency since the abolition of the half-cent in 1857 (the abstract mill, which has ...

7. A Guide Book of United States Coins - Wikipedia

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

   A Guide Book of United States Coins (the Red Book) is the longest running price guide for U.S. coins. Across all formats, 24 million copies have been sold. [2] The first edition, dated 1947, went on sale in November 1946. Except for a one-year hiatus in 1950, publication has continued to the present. R. S. Yeoman was the founding compiler of ...