205 (number)

From Wikipedia, the free encyclopedia
Jump to: navigation, search
← 204 205 206 →
Cardinal two hundred five
Ordinal 205th
(two hundred fifth)
Factorization 5 × 41
Divisors 1, 5, 41, 205
Greek numeral ΣΕ´
Roman numeral CCV
Binary 110011012
Ternary 211213
Quaternary 30314
Quinary 13105
Senary 5416
Octal 3158
Duodecimal 15112
Hexadecimal CD16
Vigesimal A520
Base 36 5P36

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

In mathematics[edit]

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]

See also[edit]

References[edit]