Search results
Results from the WOW.Com Content Network
Super Bowl XXI was an American football game between the American Football Conference (AFC) champion Denver Broncos and the National Football Conference (NFC) champion New York Giants to decide the National Football League (NFL) champion for the 1986 season. It was the 21st Super Bowl and was played on January 25, 1987, at the Rose Bowl in ...
The Twenty-first Amendment ( Amendment XXI) to the United States Constitution repealed the Eighteenth Amendment to the United States Constitution, which had mandated nationwide prohibition on alcohol. The Twenty-first Amendment was proposed by the 72nd Congress on February 20, 1933, and was ratified by the requisite number of states on December ...
Bridge: 17mm. Type XXI submarines were a class of German diesel–electric Elektroboot (German: "electric boat") submarines designed during the Second World War. One hundred and eighteen were completed, with four being combat-ready. During the war only two were put into active service and went on patrols, but these were not used in combat.
Fleet problem. The Fleet Problems are a series of naval exercises of the United States Navy conducted in the interwar period, and later resurrected by Pacific Fleet around 2014. The first twenty-one Fleet Problems — labeled with roman numerals as Fleet Problem I through Fleet Problem XXI — were conducted between 1923 and 1940.
21 is the first Blum integer, since it is a semiprime with both its prime factors being Gaussian primes. [ 3] While 21 is the sixth triangular number, [ 4] it is also the sum of the divisors of the first five positive integers : 21 is also the first non-trivial octagonal number. [ 5] It is the fifth Motzkin number, [ 6] and the seventeenth ...
The 21st century is the current century in the Anno Domini or Common Era, in accordance with the Gregorian calendar. It began on January 1, 2001 and will end on December 31, 2100. It is the first century of the 3rd millennium . The rise of a global economy and Third World consumerism marked the beginning of the century, along with increased ...
The numbering of "Popes John" does not occur in strict numerical order. Although there have been twenty-one legitimate popes named John, the numbering has reached XXIII because of two clerical errors that were introduced in the Middle Ages: first, antipope John XVI was kept in the numbering sequence instead of being removed; then, the number XX was skipped because Pope John XXI counted John ...
In photography, Roman numerals (with zero) are used to denote varying levels of brightness when using the Zone System . In seismology, Roman numerals are used to designate degrees of the Mercalli intensity scale of earthquakes. Example of postage stamp from Ireland (Éire) franked using Roman numeral for the month.