205 (two hundred
ndfive) is the
natural number following
204
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Year 204 (CCIV) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Cilo and Flavius (or, less frequently, year 957 ''Ab urbe co ...
and preceding
206
Year 206 ( CCVI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Umbrius and Gavius (or, less frequently, year 959 ''Ab urbe condit ...
.
In mathematics
205 is a
lucky number, and a
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 Wo ...
.
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 calle
Binilpentium
See also
*
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 Hi ...
*
205 Martha, a large Main belt asteroid
*
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 column ...
, 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, a French car
*
WWE 205 Live, an American professional wrestling program
References
{{DEFAULTSORT:205 (Number)
Integers