40 (forty) is the natural number following 39 and preceding 41. In Mathematics, a natural number (also called counting number) can mean either an element of the set (the positive Integers or an 39 ( thirty-nine) is the Natural number following 38 and preceding 40. 41 ( forty-one) is the Natural number following 40 and preceding 42.
Despite being related to the word "four" (4), 40 is spelled as "forty", not "fourty". This is because etymologically (and still in accents without the horse-hoarse merger), the words have different vowels, "forty" containing a contraction in the same way that "fifty" contains a contraction of "five". The English language has undergone a number of phonological changes before the historic phoneme /r/. The letters of the word "forty" are in alphabetical order; this is the only number that has this linguistic property in English. English is a West Germanic language originating in England and is the First language for most people in the United Kingdom, the United States
| Cardinal | 40 forty |
| Ordinal | 40th fortieth |
| Numeral system | quadragesimal |
| Factorization |  |
| Divisors | 1, 2, 4, 5, 8, 10, 20, 40 |
| Roman numeral | XL |
| Roman numeral (Unicode) | XL, xl |
| Binary | 101000 |
| Octal | 50 |
| Duodecimal | 34 |
| Hexadecimal | 28 |
Contents |
In mathematics
Forty is an octagonal number, and as the sum of the first four pentagonal numbers, it is a pentagonal pyramidal number. 39 ( thirty-nine) is the Natural number following 38 and preceding 40. 41 ( forty-one) is the Natural number following 40 and preceding 42. 42 ( forty-two) is the Natural number following 41 and preceding 43. 43 ( forty-three) is the Natural number following 42 and preceding 44. 44 ( forty-four) is the Natural number following 43 and preceding 45. 45 ( forty-five) is the Natural number following 44 and followed by 46. 46 ( forty-six) is the Natural number following 45 and preceding 47. 47 ( forty-seven) is the Natural number following 46 and preceding 48. 48 ( forty-eight) is the Natural number following 47 and preceding 49. This page is for the number For the steamboat see Forty-Nine (steamboat 49 ( forty-nine) is the Natural number following 48 This article discusses the number fifty. For the year 50 CE see 50. This is a list of articles about Numbers ( not about Numerals. The integers (from the Latin integer, literally "untouched" hence "whole" the word entire comes from the same origin but via French "Twenty" redirects here For the village in England, see Twenty Lincolnshire. 30 ( thirty) is the Natural number following 29 and preceding 31. This article discusses the number fifty. For the year 50 CE see 50. 60 ( sixty) is the Natural number following 59 and preceding 61. 70 ( seventy) is the Natural number following 69 and preceding 71. 80 ( eighty) is the Natural number following 79 and preceding 81. 90 ( ninety) is the Natural number preceded by 89 and followed by 91. This article describes cardinal numbers in mathematics For cardinals in linguistics see Names of numbers in English. In Set theory, an ordinal number, or just ordinal, is the Order type of a Well-ordered set. A numeral system (or system of numeration) is a Mathematical notation for representing numbers of a given set by symbols in a consistent manner In Mathematics, factorization ( also factorisation in British English) or factoring is the decomposition of an object (for In Mathematics, a divisor of an Integer n, also called a factor of n, is an integer which evenly divides n without Roman numerals are a Numeral system originating in ancient Rome, adapted from Etruscan numerals. The binary numeral system, or base-2 number system, is a Numeral system that represents numeric values using two symbols usually 0 and 1. The octal Numeral system, or oct for short is the base -8 number system and uses the digits 0 to 7 The duodecimal system (also known as base -12 or dozenal) is a Numeral system using twelve as its base. In Mathematics and Computer science, hexadecimal (also base -, hexa, or hex) is a Numeral system with a An octagonal number is a Figurate number that represents an Octagon. A pentagonal number is a Figurate number that extends the concept of triangular and Square numbers to the Pentagon, but unlike the first A pentagonal pyramidal number is a Figurate number that represents the number of objects in a pyramid with a Pentagonal base Adding up some subsets of its divisors (e. g. , 1, 4, 5, 10 and 20) gives 40, hence 40 is a semiperfect number. In Mathematics, a semiperfect number or pseudoperfect number is a Natural number n that is equal to the sum of all or some of its Proper
Given 40, the Mertens function returns 0. In Number theory, the Mertens function is M(n = \sum_{1\le k \le n} \mu(k where μ(k is the Möbius function. 40 is the smallest number n with exactly 9 solutions to the equation φ(x) = n. In Number theory, the totient \varphi(n of a Positive integer n is defined to be the number of positive integers less than or equal to
Forty is the number of n-queens problem solutions for n = 7. The eight queens puzzle is the problem of putting eight Chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess
Since the greatest prime factor of 402 + 1 = 1601 is prime and obviously more than 40 twice, 40 is a Størmer number. In mathematics a Størmer number or arc-cotangent irreducible number, named after Carl Størmer, is a positive integer n for which the greatest prime factor
40 is a repdigit in base 3 (1111) and a Harshad number in base 10. In Recreational mathematics, a repdigit is a Natural number composed of repeated instances of the same digit most often in the decimal numeral system. A Harshad number, or Niven number, is an Integer that is divisible by the sum of its digits in a given number base.
In science
- The atomic number of zirconium. See also List of elements by atomic number In Chemistry and Physics, the atomic number (also known as the proton Zirconium (zɚˈkoʊniəm /ˌzɝˈkoʊniəm/ is a Chemical element with the symbol Zr and Atomic number 40
- Negative forty is the temperature at which the Fahrenheit and Celsius scales correspond; that is, −40°F = −40°C. Temperature is a physical property of a system that underlies the common notions of hot and cold something that is hotter generally has the greater temperature Fahrenheit is a temperature scale named after Daniel Gabriel Fahrenheit (1686–1736 a German Physicist who proposed it in 1724 The Celsius Temperature scale was previously known as the centigrade scale. It is referred to as either "minus forty" or "forty below".
Astronomy
- The planet Venus forms a pentagram in the night sky every eight years with it returning to its original point every 40 years with a 40 day regression (some scholars believe that this ancient information was the basis for the #40 becoming sacred to Jews, Christians, and Muslims).
- Messier object M40, a magnitude 9. The Messier objects are a set of Astronomical objects first listed by French astronomer Charles Messier in his "Catalogue des Nébuleuses Winnecke 4 (also known as Messier 40 or WNC 4) is a Double star in the constellation Ursa Major. The apparent magnitude ( m) of a celestial body is a measure of its Brightness as seen by an observer on Earth, normalized to the value 0 double star in the constellation Ursa Major
- The New General Catalogue object NGC 40, a magnitude 12. Double Star is a Science fiction Novel by Robert A Heinlein, first serialized in Astounding Science Fiction In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Ursa Major ( is a Constellation visible throughout the year in most of the northern hemisphere The New General Catalogue ( NGC) is the best-known catalogue of Deep sky objects in Amateur astronomy. NGC 40 (also known as the Bow-Tie Nebula) is a planetary nebula discovered by W 4 planetary nebula in the constellation Cepheus
- The Saros number of the
- solar eclipse series which began on -1653 May 28 and ended on -373 July 4. A planetary nebula is an Emission nebula consisting of a glowing shell of Gas and plasma formed by certain types of Stars when they die The Saros cycle is an Eclipse cycle with a period of about 18 years 11 days 8 hours (approximately 6585⅓ days that can be used to predict Eclipses of the Sun A solar eclipse occurs when the Moon passes between the Sun and the Earth so that the Sun is wholly or partially obscured Events 585 BC - A Solar eclipse occurs as predicted by Greek philosopher and scientist Thales, while Alyattes is battling Events 836 - Pactum Sicardi, peace between the Principality of Benevento and the Duchy of Naples The duration of Saros series 40 was 1280. 1 years, and it contained 72 solar eclipses.
- lunar eclipse series which began on -1387 February 12 and ended on -71 April 12. A lunar eclipse occurs whenever the Moon passes through some portion of the Earth's shadow Events 1429 - English Forces under Sir John Fastolf defend a supply convoy carrying rations to the army besieging Orleans from attack by the Events 467 - Anthemius is elevated to Emperor of the Western Roman Empire. The duration of Saros series 40 was 1316. 2 years, and it contained 74 lunar eclipses.
In religion
The number 40 is significant in Jewish, Christian, Islamic, and other Middle Eastern traditions; it can also represent a rough calculation, a huge sum of units, or simply put, a lot of something. PLEASE TAKE NOTE************ A Christian is a person who adheres to Christianity, a monotheistic Religion centered on the life and teachings of Jesus of Nazareth For other meanings including people named 'Islam' see Islam (disambiguation. The Middle East is a Subcontinent with no clear boundaries often used as a synonym to Near East, in opposition to Far East.
- "Forty days and forty nights" describes the period for which rain fell during Noah's flood
- "Forty days" was the length of the period that the twelve spies explored the Promised Land (Numbers 13)
- "Forty years" was the length of Israel's wandering in the wilderness. Noah (or Noe, Noach;; Nūḥ; Arabic: نوح; "Rest") was according to the Bible, the tenth and last of This period of years represents a generation, that is, the time it takes for a new generation to arise.
- Moses' life is divided into three 40-year segments, separated by his fleeing from Egypt, and his return to lead the people out.
- Several Israelite leaders and kings are said to have ruled for "forty years", that is, a generation. (Examples: Eli, Saul, David, Solomon. )
- According to the Midrash, Moses spent three consecutive periods of "forty days and forty nights" on Mount Sinai:
- He went up on the seventh day of Sivan, after God gave the Torah to the Jewish people, in order to learn the Torah from God, and came down on the seventeenth day of Tammuz, when he saw the Jews worshiping the Golden Calf and broke the tablets
- He went up on the eighteenth day of Tammuz to beg forgiveness for the people's sin and came down without God's atonement on the twenty-ninth day of Av
- He went up on the first day of Elul and came down on the tenth day of Tishrei, the first Yom Kippur, with God's atonement
- Rabbi Akiva, the greatest expositor of the Oral Torah, only began learning how to read Hebrew when he was 40 years old
- A mikvah consists of 40 se'ah (approximately 200 gallons) of water
- 40 lashes is one of the punishments meted out by the Sanhedrin (in actual practice, only 39 lashes were administered)
- "Forty days and forty nights" was the period Jesus spent fasting in the wilderness, after which he was tempted by Satan. Midrash ( Hebrew: מדרש plural midrashim, lit "to repeat" is a Hebrew term referring to the not exact but comparative ( homiletic Moses ( Latin: Moyses,; Greek: grc Mωυσής in both the Septuagint and the New Testament; Arabic: ar موسىٰ The Biblical Mount Sinai is an ambiguously located mountain at which the Hebrew Bible states that the Ten Commandments were given to Moses by Sivan ( Hebrew: סִיוָן, Standard Sivan Tiberian Sîwān; from Akkadian God is the principal or sole Deity in Religions and other belief systems that worship one deity. The Seventeenth of Tammuz ( Hebrew: שבעה עשר בתמוז, Shiv'ah Asar b'Tammuz) is a minor Jewish fast day commemorating the breach of the walls The golden calf (עגל הזהב was an idol (a Cult image) made for the Israelites during Moses ' absence as he went up to Mount Sinai Av ( Hebrew: אָב, Standard Av Tiberian ʾĀḇ; from Akkadian abu Elul (אֱלוּל Standard Elul Tiberian ʾĔlûl; from Akkadian elūlu) is the twelfth Tishrei (or Tishri) (ˈtɪʃri or) ( Hebrew: תִּשְׁרֵי ( תִּשְׁרִי) Standard Tišre Yom Kippur (יוֹם כִּפּוּר ˈjɔm kiˈpur also known in English as the Day of Atonement, is the most solemn and important of the Jewish holidays Its Akiva redirects here For other people and things with this name see Akiva (disambiguation. According to Rabbinic Judaism, the oral Torah, oral Law, or oral tradition ( is the oral tradition received in conjunction with the written Torah Mikvah (or mikveh) ( plural mikva'ot or mikves) is a ritual bath designed for the purpose of ritual immersion in Judaism. The Sanhedrin (סנהדרין συνέδριον ''synedrion'', "sitting together" hence " assembly " or "council" was an assembly Jesus of Nazareth (7–2 BC / BCE —26–36 AD / CE) Fasting is primarily the act of willingly abstaining from some or all Food, Drink, or both for a period of time
- Forty days was the period from Jesus' resurrection till his ascension into heaven.
- In modern Christian practice, Lent consists of the 40 days preceding Easter. Lent, in some Christian denominations, is the forty-day-long liturgical season of fasting and prayer before Easter. Easter ( Greek: Πάσχα Pascha or Pasxa) is the most important religious feast in the Christian Liturgical year. In much of Western Christianity Sundays are excluded from the count; in Eastern Christianity Sundays are included.
- The dead are usually mourned for forty days in Muslim cultures
- Ad-Dajjal roams around the Earth in forty days, forty days that can be as many as forty months, forty years, and so on. Mourning is in the simplest sense synonymous with Grief over the Death of someone A Muslim (مسلم pronounced Muslim, not Muzlim) is an adherent of the Religion Masih ad-Dajjal ( Arabic: الدّجّال literally "The Impostor" is an evil figure in Islamic eschatology.
- Khadijah is said to be forty years old when she married Muhammad
- Muhammad is said to be forty years old when he first received the revelation delivered by an angel
- In the Yazidi faith, The Chermera temple (meaning “40 Men” in the Yazidi dialect) is so old that no one remembers how it came to have that name but it is believed to derive from the burial of 40 men on the mountaintop site. Khadijah bint Khuwaylid or Khadijah al-Kubra The following is a NAMED REFERENCE IMPORTANT PLEASE READ ##### For all questions relating to the addition of (pbuh peace be upon him or other honorifics The Yazidi (also Yezidi, Kurdish: ئزیدی or Êzidî, Arabic: يزيدي or ايزدي Assyrian/Syriac: ܓ̰ܠܟܝܐ is a
- Some Russians believe that ghosts of the dead linger at the site of their death for forty days
- In Eternalism, 40 is believed to be the number of the Corrupter, the Anti-Christ in Christianity, and is formed from the numbers 18+1+6+6+9. A ghost is said to be the apparition of a Deceased person frequently similar in appearance to that person and usually encountered in places she or he frequented This also spells Raffi with correct numero-alphabetic translation.
- In Hinduism, some popular religious prayers consist of forty shlokas or dohas (couplets, stanzas). Hinduism is a religious tradition that originated in the Indian subcontinent. A Sanskrit term shloka (श्लोक also spelt sloka specifically denotes a metered and often rhymed poetic verse or phrase For the town in Kuwait, see Doha and For the town in Qatar, see Doha Doha ( Hindi: दोहा The most common being the Hanuman Chalisa (chaalis is the Hindi term for 40) . Hanuman Chalisa (हनुमान चालीसा " Forty Chaupais on Hanuman " a Hindi -language Poem primarily praising
In other fields
Forty is also:
- To understand a people, you must live among them for 40 days. ~Arabic proverb [1][2]
- the caliber of the bullet in the .40 S&W handgun cartridge
- in the Saying "Life begins at forty"
- in the expression "forty winks", meaning a short sleep
- the distance run in the 40 yard dash in American football scouting
- A song by Dave Matthews Band
- the number of years of marriage as the ruby wedding anniversary
- the code for direct dial international phone calls to Romania
- the number in the designation of:
- Interstate 40, a freeway that runs from California to North Carolina
- U.S. Route 40, the 2285-mile highway that runs from Baltimore, Maryland, to Park City, Utah, a portion of which follows the National Road
- European route E40 from Calais to Ridder
- the A40 and M40, important highways in the UK. A saying is something that is said notable in one respect or another Personal life (or everyday life or human existence) is the course of an individual Human 's life especially when viewed as the sum of personal choices Forty winks is an English Idiomatic noun that can be used in the singular or plural and means to take a nap for a short period of time (usually not in bed or to The 40-yard dash is a sprint covering 40 Yards (36576 m) It is primarily run to evaluate the Speed of football players by scouts, American football, known in the United States and Canada simply as football, is a competitive Team sport known for mixing strategy with Dave Matthews Band (also known by the initials DMB) is a United States -based rock band originally formed in Charlottesville, Virginia A wedding anniversary is the Anniversary of the date on which a Wedding took place This is a list of country calling codes defined by ITU-T recommendation E Romania ( dated: Rumania, Roumania Interstate 40 (I-40 is a major west-east Interstate highway in the United States California ( is a US state on the West Coast of the United States, along the Pacific Ocean. North Carolina ( is a state located on the Atlantic Seaboard in the southeastern United States Park City is a town in Summit and Wasatch counties in the US state of Utah. US 40svg|right|100px|thumb|The National Road is now included as part of U ||-||-||} European route E40 is the longest European route, more than 8000 km long connecting Calais in France via Belgium, Germany Calais (kaˈlɛ in English often kæˈleɪ traditional English pronunciation /ˈkælɨs/ Kales is a town in northern France. Ridder ( Kazakh and Russian: Риддер) is a city in the East Kazakhstan Province in north-eastern Kazakhstan. For other uses see A40, for details of the A40 in london see A40 road (London. The M40 Motorway is a motorway in the English Transport network that connects London to Birmingham. The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located The A40 is a trunk road in England and Wales, connecting London to Fishguard. England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland London ( ˈlʌndən is the capital and largest urban area in the United Kingdom. Fishguard (Abergwaun = "Mouth of the River Gwaun " is a coastal Town in Pembrokeshire, south-west Wales, with a population of 3300 The M40 motorway is the second motorway in the British transport network to connect London to Birmingham
- "40", a 1983 song by U2 from their album War
- "40'" is the title of a song by Franz Ferdinand
- The band Crush 40
- in the title of the Food Network show $40 a Day
- in the name of WD-40, a spray lubricant
- in the name of the food additive FD & C Red Dye #40, commonly known as "Red 40"
- the 40 ounce size used for liquor, typically fairly cheap malt beer; a person sometimes "pours a forty on the curb", i. Birmingham ( ˈbɜːmɪŋəm Ber -ming-um " 40 " also known as " 40 (How Long " is the tenth and final track from U2 's 1983 album War. War is the third studio album by Irish rock band U2, released on. Franz Ferdinand is a rock band that formed in Glasgow, Scotland in 2001 Crush 40 is a Japanese American Hard rock band originally known as Sons of Angels that was made to create music for the Sega arcade racing game Food Network is a cable network that airs specials and recurring (episodic programs about food and cooking A television program (US television programme (UK or television show (U WD-40 is the Trademark name of a widely-used Penetrating oil (and cleaner, Dielectric and anti- Corrosion) spray Solution A lubricant (sometimes referred to as a "Lube" is a substance (often a liquid introduced between two moving surfaces to reduce the Friction between them improving Malt liquor is a North American term referring to a type of Beer with high alcohol content Malting is a process applied to Cereal grains in which the grains are made to Germinate by soaking in water and are then quickly halted from germinating further Beer is the world's oldest and most widely consumed Alcoholic beverage and the third most popular drink overall after water and tea e. , pours out said bottle onto the street, in memory of a person who has died
- the number of questions asked in the theory road test in the Republic of Ireland
- the number of thieves in Ali Baba and the Forty Thieves, from Thousand and One Nights (both the numbers 40 and 1001 are more likely to mean "many" than to indicate a specific number)
- the customary number of hours in a regular workweek in some Western countries. Ali Baba ( Arabic, Persian: علي بابا is a Fictional character based in Ancient Arabia. Working time refers to the period of time that an individual spends at paid occupational labor The song, "40 Hour Week (For a Livin')" by Alabama (as well as their album, 40-Hour Week), takes its name from the standard workweek length. "40 Hour Week (For a Livin'" is a song made famous by the Country music band Alabama. Alabama is a Grammy Award -winning Country music band that originated in Fort Payne, Alabama, United States. 40-Hour Week is the sixth studio Album from Country music band Alabama.
- the classic Russian vodka is alcohol content 40 percent by volume
- the jersey number of Pat Tillman, which was retired by the Arizona Cardinals
- the number of wires in a Parallel ATA-cable
- Form 1040 (referred to as a "ten-forty") is a standard Internal Revenue Service form used to file for federal taxes in the United Sates
- UB40 is a form for those claiming unemployment benefits in the United Kingdom. Vodka is one of the world's most popular Distilled beverages It is a clear liquid which consists of mostly Water and Ethanol purified by Distillation Patrick Daniel Tillman ( November 6, 1976 – April 22, 2004) was an American football player who left his professional sports The Arizona Cardinals are a professional American football team based in Glendale Arizona, just outside of Phoenix. AT Attachment with Packet Interface ( ATA/ATAPI) is a standard interface used to connect storage devices such as Hard disks Solid-state Tax forms in the United States are used by taxpayers and tax-exempt organizations to report financial information to the Internal Revenue Service (IRS The UB40 are a British Reggae band formed in 1978 in Birmingham. Featuring the same line-up of 8 musicians from 1978-2008 the band placed more than 50 The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located The band UB40 was named after this form
- The Rolling Stones CD "Forty Licks"
- David Stremme's Nextel Cup Series number for Chip Ganassi Racing
- the number of positions on a number of radio countdown programs, most notably American Top 40 and American Country Countdown. A musical ensemble is a group of two or more Musicians who perform instrumental or vocal Music. David Andrew Stremme (born in South Bend Indiana on June 19, 1977) is a NASCAR driver Chip Ganassi Racing with Felix Sabates is an automotive racing organization with teams competing in NASCAR, IRL, and Grand-Am racing American Top 40 (commonly abbreviated to AT40) is an internationally- syndicated, independent American Country Countdown -- also known as ACC or American Country Countdown with Kix Brooks -- is an internationally syndicated
- for The Early Show segment "Chef on a Shoestring", chefs are given a $40 budget. The Early Show is an American Television morning news Talk show broadcast by CBS from New York City, 7 to 9 a Most chefs bring it in under. (For holidays they are given $80).
- Rigveda : The total number of syllables in Rigveda, the most sacred and ancient scripture of the Hindu Religion, equal to the total Muhurtas or the ‘auspicious time’ n 40 years. There are 432,000 syllables in Rigveda. In each day, we have 30 Muhurtas. The total number of days in a year as per the Hindu calendar is 360 days. This works out to 40 years. The number 40 is an important number in the Hindu tradition. . . . . . Shrikant V Soman
- the M40 (field protective mask), a United States military gas mask
Historical years
40 A.D., 40 B.C., 1940, 2040, etc. The M40 Field Protective Mask is one of various Gas masks used by the Military of the United States and its allies to protect from field concentrations of chemical Year 40 was a Leap year starting on Friday (link will display the full calendar of the Julian calendar. Year 40 BC was a Common year starting on Friday (link will display the full calendar of the Julian calendar. Year 1940 ( MCMXL) was a Leap year starting on Monday (link will display the full 1940 calendar of the Gregorian calendar. 2040 ( MMXL) will be a Leap year starting on Sunday of the Gregorian calendar.
See also
References
- ^ Dallal, Tamalyn (2007). 40 acres and a mule is a term for compensation that was promised to be awarded to freed African American slaves after the Civil War — 40 Acres (16 40 Days & 1001 Nights. Seattle: Melati Press, back cover. ISBN 978-0-9795155-0-7.
- ^ 40 Days & 1001 Nights - One Woman's Dance Through Life in the Islamic World.
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