Number 50

A page of the Numeropedia - the Special Encyclopedia of Numbers

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[Calendar]  Pentecost Sunday (or Whit Sunday) is 49 days after Easter Sunday (or literally from the prefix “pente-“, the 50th day). 

 

[Chemistry]  The atomic number of Tin (Sn).

 

[Chemistry]  The number of electrons that can reside in a shell is 2n2, i.e., 2, 8, 18, 32, 50, 72 and 98.

 

[Chemistry]  Solder, the material used for joining iron surfaces, is 50% tin and 50% lead.

 

[Game]  The 50-move rules in chess: if there have been 50 consecutives moves of white and blacks chess pieces without any piece taken or any pawn moved, then a player can claim a draw.

 

[Game]  The highest possible score of a word in the Scrabble game is 164 for the word “Quartzy”: playing across triple-word square with “z” on a double-letter square and a premium of 50 for using all 7 letters on the rack.

 

[Game]  Jigsaw puzzles are typically comprised of 10, 20, 50, 100, 200, 300, 500, 750, 1000, 1500 or 2000 interlocking pieces.

 

[Game]  In the popular TV game show “Deal or No Deal”, a contestant has the choices of one of 26 suitcases of the prizes U.S. $0.01, 1, 5, 10, 25, 50, 75, 100, 200, 300, 400, 500, 750, 1000, 5000, 10,000, 25,000, 50,000, 75,000, 100,000, 200,000, 300,000, 400,000, 500,000, 750,000 and the maximum amount is at least $1,000,000 (in a typical show).

 

 [Game]  In the popular TV game show “Who Wants to be a Millionaire?”, a contestant has to answer correctly 15 questions to step up the fixed prizes in U.S.$: 100, 200, 300, 500, 1000, to 2000, 4000, 8000, 16,000, 32,000, to 64,000, 125,000, 250,000, 500,000 and the maximum amount is at least $1,000,000, with 3 lifelines: polling the audience, calling a friend and narrowing to “50:50” answers. The guaranteed middle prizes can be $1000 or $32,000.

 

[Geology]  U.S. cities/towns whose names start with “Fifty”: Fifty Lakes, Minnesota 56448 and Fifty-Six, Arkansas 72533.

 

[Geology]  Nevada’s Highway 50 was named, by “Life” magazine in 1986, the “Loneliest Highway in America”.

 

[History]  The number of the U.S. states (together with the District of Colombia). The 50th state is Hawaii, proclaimed on 21 August 1959. The current 50-star flag (the 20th design since the country was formed) made official debut at Independence Hall, Philadelphia on 4 July 1960.

 

[History]  Hawaii became the 50th state of the U.S. on 21 August 1959.

 

[History]  The U.S. Senate vote result in a tie 50-50 is the only situation that the U.S. Vice-President has a chance to cast his vote to break the tie. If he does not vote, the measure or bill is failed automatically.

 

[Language]  Prefixe: Quinquage-...

 

[Language]  Roman numerals: L = 50 & L-bar or (L) = 50,000.

 

[Math.]  A number is divisible by 25 when it ends with 2 digits 00, 25, 50 or 75.

 

[Math.]  A base system of multigrade equalities: (References [??])

1+4+12+13+20 = 50 = 2+3+10+16+19

12+42+122+132+202 = 730 = 22+32+102+162+192

13+43+123+133+203 = 11,990 = 23+33+103+163+193.

Multigrade equalities still hold by adding any integer n to every base term in both sides.  Hence, the base equality always has number 1 appearing in one side.

 

[Math.]  165,033 = 163+503+333 and its modified number: 1,000,165,033 = 10003+163+503+333. (Generalizable)

 

[Math.]  The smallest number that can be sum of 2 square numbers in 2 ways: 50 = 12+72 = 52+52.

 

[Measure]  The typical number of sheets of paper in a notepad/notebook: 50, 80 or 100.

 

[Measure]  50-50 (or half-half) is a popular way of fair shares between two parties.

 

[Measure]  1 liang = 50 g (grams), a traditional Chinese weight unit. (Modern day value).

 

[Money]  The number of cents (pennies) in a half dollar coin. (U.S. coins).

 

[Money]  The number of stars circling around the eagle on the U.S. half dollar coin.

 

[Money]  The U.S. $50 bill figures the portrait of the 18th U.S. President Ulysses Simpson Grant. On the back is the U.S. Capitol.

 

[Money]  By the U.S. law, any picture of U.S. money bill must be either 50% larger or 25% smaller than the real bill, to protect against counterfeit bills.

 

[Movie]  Name of TV show/series or movie: “50 First Dates”.

 

[Movie]  The critical speed in the movie “Speed” is 50 mph.

 

[Phone]  The number of names listed in the first telephone book, (a 1-page list of subscribers), published by the New Haven District Telephone Company, New Haven, Connecticut, in February 21, 1878.

 

[Science]  One of seven magic numbers in nuclear physics: 2, 8, 20, 28, 50, 82 and 126. They are the numbers of nucleons such that they are arranged into complete shells within the atomic nucleus.

 

[Sport]  The length (m, meters) of an Olympic swimming pool.

 

[Sport]  The width (15.24 meters) of a basketball court.

 

[Sport]  The score of when a dart hitting the bull’s-eye (red small center) in a dartboard game. The score for the outer bull’s-eye is 25.

 

[Sport]  The standard ranges of swimming/tracking competitions (meters): 50, 100, 200, 400, 800 and 1500. Also, for tracking: 2000, 3000, 5000 and 10000.

 

[Sport]  The PGA Tour’s Vardon Trophy for lowest scoring average in a year requires playing a minimum of 50 rounds of PGA tournaments.

 

[Tech.]  The HD-DVD will have memory capacity of 15, 30 or 50 GB (gigabytes).

(Toshiba's HD-DVD discs have 30 GB. Sony's Blu-Ray DVD discs have 50 GB.)

 

[Tech.]  The frequency of the A.C. electrical power in many countries, except the U.S. and Canada is 50 Hz (Hertz). (A.C. = alternating current).

 

[Tech.]  The “number system” code of an EAN-13 barcode for the United Kingdom’s products.

 

[Tech.]  The numbers of automobile engine oil SAE viscosity: 20W-20 (-40, -50), 10W-30 (-40) and 5W-20 (-30).

 

[Trivia]  Popular U.S. city street speed limits: 15, 25, 30, 35, 40, 45 or 50 miles/hour.

 

[Trivia]  The 50th wedding anniversary is traditionally/modernly named gold anniversary.

 

[World]  The ISO country code for Bangladesh is 050. (ISO-3166).