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205 (number)
205 (two hundred ndfive) is the natural number following 204 and preceding 206. In mathematics 205 is a lucky number, and a Wolstenholme number. On an infinite chessboard, a knight can reach exactly 205 squares within four moves. There are 205 different ways of forming a connected graph by adding six edges to a set of five labeled vertices. In other fields * The atomic number of an element temporarily calleBinilpentium See also * List of highways numbered 205 * 205 Martha, a large Main belt asteroid * 205 Yonge Street, a building in Toronto * 205 series, a commuter train type in Japan * Peugeot 205, a French car * WWE 205 Live ''WWE 205 Live'' is an American professional wrestling streaming television program that was produced by WWE. It premiered on November 29, 2016, and ended on February 11, 2022. The show originally aired exclusively on the WWE Network until March ..., an American professional wrestling program References {{DEFAULTSORT:205 (Number) Integers< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''Cardinal number, cardinal numbers'', and numbers used for ordering are called ''Ordinal number, ordinal numbers''. Natural numbers are sometimes used as labels, known as ''nominal numbers'', having none of the properties of numbers in a mathematical sense (e.g. sports Number (sports), jersey numbers). Some definitions, including the standard ISO/IEC 80000, ISO 80000-2, begin the natural numbers with , corresponding to the non-negative integers , whereas others start with , corresponding to the positive integers Texts that exclude zero from the natural numbers sometimes refer to the natural numbers together with zero as the whole numbers, while in other writings, that term is used instead for the integers (including negative integers). The natural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
204 (number)
204 (two hundred ndfour) is the natural number following 203 and preceding 205. In mathematics 204 is a refactorable number. 204 is a square pyramidal number: 204 balls may be stacked in a pyramid whose base is an 8 × 8 square. Its square, 2042 = 41616, is the fourth square triangular number. As a figurate number, 204 is also a nonagonal number and a truncated triangular pyramid number. 204 is a member of the Mian-Chowla sequence. There are exactly 204 irreducible quintic polynomials over a four-element field, exactly 204 ways to place three non-attacking chess queens on a 5 × 5 board, exactly 204 squares of an infinite chess move that are eight knight's moves from the center, exactly 204 strings of length 11 over a three-letter alphabet with no consecutively-repeated substring, and exactly 204 ways of immersing an oriented circle into the oriented plane so that it has four double points. Both 204 and its square are sums of a pair of twin p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
206 (number)
206 (two hundred ndsix) is the natural number following 205 and preceding 207. In mathematics 206 is both a nontotient and a noncototient. 206 is an untouchable number. It is the lowest positive integer (when written in English as "two hundred and six") to employ all of the vowels once only, not including Y. The other numbers sharing this property are 230, 250, 260, 602, 640, 5000, 8000, 9000, 80,000 and 90,000. 206 and 207 form the second pair of consecutive numbers (after 14 and 15) whose sums of divisors are equal. There are exactly 206 different linear forests on five labeled nodes, and exactly 206 regular semigroups of order four up to isomorphism and anti-isomorphism. In science There are 206 bones in the typical adult human body.. See also * The Year 206 AD * Cessna 206, a single engine light aircraft * Bell 206, a light helicopter * The Peugeot 206, a French supermini automobile * US Area code 206, and The 206 slang terminology for the urban part of the greater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucky Number
In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the Sieve of Eratosthenes that generates the primes, but it eliminates numbers based on their position in the remaining set, instead of their value (or position in the initial set of natural numbers). The term was introduced in 1956 in a paper by Gardiner, Lazarus, Metropolis and Ulam. They suggest also calling its defining sieve, "the sieve of Josephus Flavius" because of its similarity with the counting-out game in the Josephus problem. Lucky numbers share some properties with primes, such as asymptotic behaviour according to the prime number theorem; also, a version of Goldbach's conjecture has been extended to them. There are infinitely many lucky numbers. Twin lucky numbers and twin primes also appear to occur with similar frequency. However, if ''L''''n'' denotes the ''n''-th lucky number, and ''p''''n'' the ''n''-th prime, then ''L''''n'' > ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolstenholme Number
A Wolstenholme number is a number that is the numerator of the generalized harmonic number ''H''''n'',2. The first such numbers are 1, 5, 49, 205, 5269, 5369, 266681, 1077749, ... . These numbers are named after Joseph Wolstenholme, who proved Wolstenholme's theorem In mathematics, Wolstenholme's theorem states that for a prime number p \geq 5, the congruence : \equiv 1 \pmod holds, where the parentheses denote a binomial coefficient. For example, with ''p'' = 7, this says that 1716 is one more than a multiple ... on modular relations of the generalized harmonic numbers. References * Integer sequences {{Num-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knight (chess)
The knight (♘, ♞) is a piece in the game of chess, represented by a horse's head and neck. It moves two squares vertically and one square horizontally, or two squares horizontally and one square vertically, jumping over other pieces. Each player starts the game with two knights on the b- and g-, each located between a rook and a bishop. Movement Compared to other chess pieces, the knight's movement is unique: it moves two squares vertically and one square horizontally, or two squares horizontally and one square vertically (with both forming the shape of a capital L). When moving, the knight can jump over pieces to reach its destination. Knights capture in the same way, replacing the enemy piece on the square and removing it from the board. A knight can have up to eight available moves at once. Knights and pawns are the only pieces that can be moved in the chess starting position. Value Knights and bishops, also known as , have a value of about three pawns. Bishops utili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Connected Graph
In mathematics and computer science, connectivity is one of the basic concepts of graph theory: it asks for the minimum number of elements (nodes or edges) that need to be removed to separate the remaining nodes into two or more isolated subgraphs. It is closely related to the theory of network flow problems. The connectivity of a graph is an important measure of its resilience as a network. Connected vertices and graphs In an undirected graph , two '' vertices'' and are called connected if contains a path from to . Otherwise, they are called disconnected. If the two vertices are additionally connected by a path of length , i.e. by a single edge, the vertices are called adjacent. A graph is said to be connected if every pair of vertices in the graph is connected. This means that there is a path between every pair of vertices. An undirected graph that is not connected is called disconnected. An undirected graph ''G'' is therefore disconnected if there exist two vertices i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atomic Number
The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every atom of that element. The atomic number can be used to uniquely identify ordinary chemical elements. In an ordinary uncharged atom, the atomic number is also equal to the number of electrons. For an ordinary atom, the sum of the atomic number ''Z'' and the neutron number ''N'' gives the atom's atomic mass number ''A''. Since protons and neutrons have approximately the same mass (and the mass of the electrons is negligible for many purposes) and the mass defect of the nucleon binding is always small compared to the nucleon mass, the atomic mass of any atom, when expressed in unified atomic mass units (making a quantity called the "relative isotopic mass"), is within 1% of the whole number ''A''. Atoms with the same atomic number but dif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Highways Numbered 205
Route 205 or Highway 205 may refer to: Canada * Manitoba Provincial Road 205 * New Brunswick Route 205 * Newfoundland and Labrador Route 205 * Nova Scotia Route 205 * Prince Edward Island Route 205 * Quebec Route 205 China * China National Highway 205 Costa Rica * National Route 205 India * National Highway 205 (India) Japan * Japan National Route 205 Thailand * Thailand Route 205 (Suranarai Road) United States * Interstate 205 * Alabama State Route 205 * Connecticut Route 205 * Florida State Road 205 (former) * Georgia State Route 205 (former) * Indiana State Road 205 * Iowa Highway 205 (former) * K-205 (Kansas highway) * Kentucky Route 205 * Maine State Route 205 * M-205 (Michigan highway) (former) * Montana Secondary Highway 205 * New Mexico State Road 205 * New York State Route 205 * North Carolina Highway 205 * Ohio State Route 205 * Oregon Route 205 * Pennsylvania Route 205 (former) * Tennessee State Route 205 * Texas State Highway 205 ** Texas Stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
205 Martha
Martha ( minor planet designation: 205 Martha) is a large main belt asteroid. It is a dark, primitive carbonaceous C-type asteroid. This object was discovered by Johann Palisa on 13 October 1879, in Pola and was named after Martha, a woman in the New Testament. Efforts to determine the rotation period for this asteroid have produced wildly different results, in large part because the actual period is close to half of an Earth day. A study performed during 2013 showed that the light curve In astronomy, a light curve is a graph of light intensity of a celestial object or region as a function of time, typically with the magnitude of light received on the y axis and with time on the x axis. The light is usually in a particular frequ ... changed significantly during the observation period, adding to the difficulty. This study gave a synodic rotation period of 14.905 ± 0.001 h. References External links Lightcurve plot of 205 Martha Palmer Divide Observatory, B. D. Warne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
205 Yonge Street
205 Yonge Street was formerly a four-story Bank of Toronto building built in 1905 in Toronto, Ontario, Canada. It was designated under the ''Ontario Heritage Act'' in 1975. The E. J. Lennox-designed structure has a domed roof and Corinthian columns on the front, and it is an example of neoclassical architecture. The building is currently closed to the public, and it has been in the process of being refurbished, with of space. As of April 2019, the property is for sale. Next door at 197 Yonge Street is another historic building. The gap between the two sites was once the Colonial Tavern, which was closed in the 1970s and demolished. The two buildings are located on the east side of Yonge Street, across from the Toronto Eaton Centre, and a few feet north of the Elgin and Winter Garden Theatres. 205 Yonge was once home to the Toronto Historical Board, a city agency that was in charge of protecting historic sites in Toronto. It left the building in 1998 when the agency was revampe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
205 Series
5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. It has attained significance throughout history in part because typical humans have five digits on each hand. In mathematics 5 is the third smallest prime number, and the second super-prime. It is the first safe prime, the first good prime, the first balanced prime, and the first of three known Wilson primes. Five is the second Fermat prime and the third Mersenne prime exponent, as well as the third Catalan number, and the third Sophie Germain prime. Notably, 5 is equal to the sum of the ''only'' consecutive primes, 2 + 3, and is the only number that is part of more than one pair of twin primes, ( 3, 5) and (5, 7). It is also a sexy prime with the fifth prime number and first prime repunit, 11. Five is the third factorial prime, an alternating factorial, and an Eisenstein prime with no imaginary part and real part of the form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
