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Bertrand's box paradox is a veridical paradox in elementary probability theory. It was first posed by Joseph Bertrand in his 1889 work Calcul des Probabilités . There are three boxes: a box containing two gold coins, a box containing two silver coins, a box containing one gold coin and one silver coin. Choose a box at random.
The Chinese Gold Panda ( simplified Chinese: 熊猫金币; traditional Chinese: 熊貓金幣; pinyin: xióng māo jīn bì) is a series of gold bullion coins issued by the People's Republic of China. The Official Mint of the People's Republic of China introduced the panda gold bullion coins in 1982. [ 1] The panda design changes every year ...
The gold dollar or gold one-dollar piece is a gold coin that was struck as a regular issue by the United States Bureau of the Mint from 1849 to 1889. The coin had three types over its lifetime, all designed by Mint Chief Engraver James B. Longacre. The Type 1 issue has the smallest diameter (0.5 inch =12.7mm) of any United States coin minted to ...
A double eagle is a gold coin of the United States with a denomination of $20. [1] (Its gold content of 0.9675 troy ounces [30.09 g] was worth $20 at the 1849 official price of $20.67/ozt.) The coins are 34 mm × 2 mm and are made from a 90% gold (0.900 fine or 21.6 kt) and 10% copper alloy and have a total weight of 1.0750 troy ounces (1.1794 ...
The eagle is a United States $10 gold coin issued by the United States Mint from 1795 to 1933 . The eagle was the largest of the five main decimal base-units of denomination used for circulating coinage in the United States prior to 1933, the year when gold was withdrawn from circulation. These five main base-units of denomination were the mill ...
The half eagle is a United States coin that was produced for circulation from 1795 to 1929 and in commemorative and bullion coins since 1983. Composed almost entirely of gold, its face value of five dollars is half that of the eagle coin. Production of the half eagle was authorized by the Coinage Act of 1792, and it was the first gold coin ...
Krugerrand. 1947 by Coert Steynberg – A pronking springbok antelope with the mint date in the field. The legend is inscribed with "KRUGERRAND" and the gold weight. The Krugerrand ( / ˈkruːɡərænd /; [ 1] Afrikaans: [ˈkry.ərˌrant]) is a South African coin, first minted on 3 July 1967 to help market South African gold and produced by ...
The five-pound piece was one of the original denominations of gold coins authorised as part of the Great Recoinage of 1816. It was not struck until 1820, and then only as a pattern coin. It was issued again in small numbers in 1826, 1829 and 1839, with the last using the well-regarded depiction of Una and the Lion by William Wyon.