# ⓘ 85 (number)

## ⓘ 85 (number)

85 is:

• a centered square number.
• the smallest number that can be expressed as a sum of two squares, with all squares greater than 1, in two ways, 85 = 9 2 + 2 = 7 2 + 6 2.
• the length of the hypotenuse of four pythagorean triangles.
• a centered triangular number.
• a Smith number in decimal.
• an octahedral number.
• the product of two prime numbers 5 and 17, and is therefore a biprime; specifically, the 24th biprime not counting perfect squares. Together with 86 and 87, it forms the second cluster of three consecutive biprimes.
• a decagonal number.

## 1. In astronomy

• NGC 85 is a galaxy in the constellation Andromeda
• Messier object M85 is a magnitude 10.5 lenticular galaxy in the constellation Coma Berenices
• 85 Io is a large main belt asteroid
• 85 Ceti is a variable star in the constellation of Cetus
• 85 Pegasi is a multiple star system in constellation of Pegasus
• 85P/Boethin is a periodic comet

## 2. In titles and names

• 85°C, a Taiwanese coffee store chain.
• Cupid & Psyche 85, an album by band Scritti Politti 1985
• Live/1975–85, an album of live recordings by Bruce Springsteen 1986
• 80–85 a compilation album by Bad Religion 1991
• Minuscule 85, Papyrus 85, Lectionary 85 are early Greek manuscripts of the New Testament
• The 85 Ways to Tie a Tie, a book by Thomas Fink and Yong Mao
• 45/85 was a television documentary on World War II
• 85 Days: The Last Campaign of Robert Kennedy a book by Jules Witcover
• "85", a 2000 rap single by YoungBloodz, from their album Against Da Grain
• Federalist No. 85, by Alexander Hamilton, the last of The Federalist Papers 1788

## 3. In sports

In U.S. college athletics, schools that are members of NCAA Division I are limited to providing athletic scholarships to a maximum of 85 football players in a given season. The specifics vary by the two Division I football subdivisions:

• In the second-level FCS, schools are allowed to provide football-related athletic aid equivalent to 63 full scholarships, but this aid may be divided among up to 85 players as the schools see fit.
• In the top-level FBS, each player provided with a scholarship may, and almost always does, receive a full scholarship.

## 4. In other fields

• EF 85mm is a photographic camera lens by Canon
• The IQ and nickname of Aaron in Alien 3
• The year AD 85, 85 BC, or 1985.
• DRG Class 85, a category of German train locomotives
• The Muslim calendar year 85 AH.
• KC 85 was a family of small computers built in East Germany in the 1980s
• MCS-85 was a family of Intel processors including the 8085
• British Rail Class 85, a category of UK train locomotives
• Part of the assignation for the Toyota AE85, commonly referred to as an "eight-five".
• Lima Site 85 was a battle in the Vietnam War
• TI-85 was a graphing pocket calculator by Texas Instruments
• Arabigere 85 is a village in India
• Learjet 85 is an all-composite plane being developed by Bombardier Aerospace
• E85 fuel is 85% ethanol and 15% conventional gasoline
• F85 disambiguation, multiple uses
• The atomic number of astatine
• PMD 85 was a personal computer built in Czechoslovakia in 1985
• The number worn by Chad Ochocinco, whose name means "eight five" in Spanish
• The number of the French department Vendee
• The radix of the Ascii85 sometimes called Base85 binary-to-text encoding
• The ISBN Group Identifier for books published in Brazil
• A85 is the Dutch Defence in the Encyclopaedia of Chess
• TK85 was a clone of the Sinclair ZX81 made in Brazil in 1983

## 5. In military technology

• Tu-85 was a prototype Soviet bomber
• PT-85 is a Korean tank
• 85mm is a common caliber for cannons
• TR-85 was a Romanian battle tank
• Taurus Model 85, a 9mm revolver made in Brazil
• HG 85 is a Swiss fragmentation grenade
• ASU-85 a Soviet self-propelled gun
• CZ 85 is a Czech 9mm semiautomatic pistol
• SU-85 was a Soviet tank
• 7.62 Tkiv 85 is a Finnish army rifle