#jsDisabledContent { display:none; } My Account | Register | Help

# 205 (number)

Article Id: WHEBN0006317340
Reproduction Date:

 Title: 205 (number) Author: World Heritage Encyclopedia Language: English Subject: Collection: Integers Publisher: World Heritage Encyclopedia Publication Date:

### 205 (number)

 ← 204 205 206 →
Cardinal two hundred five
Ordinal 205th
(two hundred and fifth)
Factorization 5 × 41
Divisors 1, 5, 41, 205
Roman numeral CCV
Binary 110011012
Ternary 211213
Quaternary 30314
Quinary 13105
Senary 5416
Octal 3158
Duodecimal 15112
Vigesimal A520
Base 36 5P36

205 (two hundred [and] five) is the natural number following 204 and preceding 206.

## In mathematics

205 is a lucky number,[1] and a Wolstenholme number.[2] On an infinite chessboard, a knight can reach exactly 205 squares within four moves.[3] There are 205 different ways of forming a connected graph by adding six edges to a set of five labeled vertices.[4]

## References

1. ^ "Sloane's A000959 : Lucky numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. ^ "Sloane's A007406 : Wolstenholme numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. ^ "Sloane's A018836 : Number of squares on infinite chess-board at <= n knight's moves from a fixed square", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
4. ^ "Sloane's A061540 : Number of connected labeled graphs with n nodes and n+1 edges", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.

Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.