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2021. The quarter, formally known as the quarter dollar, is a denomination of currency in the United States valued at 25 cents, representing one-quarter of a dollar. Adorning its obverse is the profile of George Washington, while its reverse design has undergone frequent changes since 1998. Since its initial production in 1796, the quarter ...
White House. Design date. 2003. The United States twenty-dollar bill (US$20) is a denomination of U.S. currency. A portrait of Andrew Jackson, the seventh U.S. president (1829–1837), has been featured on the obverse of the bill since 1928; the White House is featured on the reverse. As of December 2018, the average life of a $20 bill in ...
The half dollar, sometimes referred to as the half for short or 50-cent piece, is a United States coin worth 50 cents, or one half of a dollar.In both size and weight, it is the largest circulating coin currently minted in the United States, [1] being 1.205 inches (30.61 millimeters) in diameter and 0.085 in (2.16 mm) in thickness, and is twice the weight of the quarter.
The United States dollar ( symbol: $; currency code: USD; also abbreviated US$ to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official currency of the United States and several other countries.
Guinea (coin) Five-guinea coin, James II, Great Britain, 1688. The guinea ( / ˈɡɪniː /; commonly abbreviated gn., or gns. in plural) [ 1] was a coin, minted in Great Britain between 1663 and 1814, that contained approximately one-quarter of an ounce of gold. [ 2] The name came from the Guinea region in West Africa, from where much of the ...
The United States one-dollar bill ( US$1 ), sometimes referred to as a single, has been the lowest value denomination of United States paper currency since the discontinuation of U.S. fractional currency notes in 1876. An image of the first U.S. president (1789–1797), George Washington, based on the Athenaeum Portrait, a 1796 painting by ...
Since the office was established in 1789, 45 men have served in 46 presidencies. The first president, George Washington, won a unanimous vote of the Electoral College. [ 4] Grover Cleveland served two non-consecutive terms and is therefore counted as the 22nd and 24th president of the United States, giving rise to the discrepancy between the ...
t. e. The Millennium Prize Problems are seven well-known complex mathematical problems selected by the Clay Mathematics Institute in 2000. The Clay Institute has pledged a US$ 1 million prize for the first correct solution to each problem. The Clay Mathematics Institute officially designated the title Millennium Problem for the seven unsolved ...