205 (two hundred
ndfive) is the
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 ...
following
204 and preceding
206.
In mathematics
205 is a
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 remain ...
, and a
Wolstenholme number.
On an infinite chessboard, a
knight
A knight is a person granted an honorary title of knighthood by a head of state (including the Pope) or representative for service to the monarch, the church or the country, especially in a military capacity. Knighthood finds origins in the Gr ...
can reach exactly 205 squares within four moves. There are 205 different ways of forming a
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 subgrap ...
by adding six edges to a set of five labeled vertices.
In other fields
* The
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 ...
of an element temporarily calle
Binilpentium
See also
*
List of highways numbered 205
*
205 Martha, a large Main belt asteroid
*
205 Yonge Street, a building in Toronto
*
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 eac ...
, a commuter train type in Japan
*
Peugeot 205
The Peugeot 205 is a supermini (B-segment) car produced by the French manufacturer Peugeot from 1983 to 1999.
It was declared "car of the decade" by ''CAR Magazine'' in 1990. It also won ''What Car?s Car of the Year for 1984.
The 205 was intro ...
, 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