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Topic: 13 (number)


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In the News (Mon 17 Jun 19)

  
  13 (number) - Wikipedia, the free encyclopedia
13 is the only positive integer that is the fourth root of the sum of the squares of two successive positive integers (119 and 120).
The 13th root is the most famous integer root calculation record, because 13 is the first prime number over 10 such as the last digit of a 13th integer power is the same as the last digit of its 13th root.
The number is also considered unlucky by some as it is the sum of 1+4+5+3, the year of the fall of Constantinople to the Turks, marking the end of the Byzantine Empire, though it may be considered lucky by Turks on the same basis.
en.wikipedia.org /wiki/13_(number)   (2240 words)

  
 Triskaidekaphobia - Wikipedia, the free encyclopedia
Thirteen may be considered a "bad" number simply because it is one more than 12, which is a popularly used number in many cultures (due to it being a highly composite number).
Some buildings number their floors so as to skip the thirteenth floor entirely, jumping from floor 12 to floor 14 in order to avoid distressing triskaidekaphobics, or using 12 and 12b instead.
Interestingly, "13" is often considered a lucky number in these cultures since the word "three," pronounced "san," is similar to the pronunciation of the word "live" or "survive" in Chinese and Korean.
en.wikipedia.org /wiki/Triskaidekaphobia   (1288 words)

  
 What's Special About This Number?
is the number of planar partitions of 10.
is the number of planar partitions of 11.
is the number of planar partitions of 13.
www.stetson.edu /~efriedma/numbers.html   (7482 words)

  
 EAN-13 SYMBOLOGY
Number System: The number system consists of two digits (sometimes three digits) which identify the country (or economic region) numbering authority which assigned the manufacturer code.
The check digit is the number which, when added to the totals calculated in step 4, result in a number evenly divisible by 10.
The first character of the EAN-13 number system code (i.e., the first digit of the EAN-13 value) is encoded in the parity of the characters of the left-hand side of the symbol.
www.barcodeisland.com /ean13.phtml   (2769 words)

  
 Puzzle 242.  Sum of distinct squared primes
In order to express a number which is a multiple of 24, we would need at least 13 distinct primes squared.
So 13 is a minimum for K. To express a number N=24n+1 could potentially require only 1 prime, but there are infinitely many numbers that are not the square of a prime.
If a number of the form 120k+75 is the sum of fewer than 16 distinct squared primes, it is the sum of exactly 3 distinct squared primes, one of which is 25.
www.primepuzzles.net /puzzles/puzz_242.htm   (831 words)

  
 Numbers: number 13
13 is the `unlucky number' and Friday the 13th is supposed to be particularly unlucky.
Triskaidekaphobia is the fear of the number 13, for example, of 13 people sitting at a table.
Quite ordinary pine cones show this pattern of 8 and 13 spirals, although it is sometimes easier to see it on the sides of the cone, instead of on the base as in the photograph here.
richardphillips.org.uk /number/Num13.htm   (287 words)

  
 nbc5i.com - Health Encyclopedia - Hypertension
Systolic blood pressure is consistently over 140 (systolic is the "top" number of your blood pressure measurement, which represents the pressure generated when the heart beats)
Diastolic blood pressure is consistently over 90 (diastolic is the "bottom" number of your blood pressure measurement, which represents the pressure in the vessels when the heart is at rest)
Either or both of these numbers may be too high.
www.nbc5i.com /encyclopedia/6860213/detail.html   (1037 words)

  
 Main Articles: 'ISBN-13: New Number on the Block', Ariadne Issue 41
As a result of electronic publishing and other changes in the publishing industry, the numbering capacity of the ISBN system is being consumed at a much faster rate than was originally anticipated when the standard was designed in the late 1960s.
Numbers in the new range will only be allocated once numbers from the old range have been exhausted.
They also rejected the idea of changing the ISBN into a 'dumb' number (eliminating the region/country and publisher identifiers) and culling all unassigned numbers for use elsewhere: because of the need for a strong central database to administer assignment and prevent duplication, this would be a costly and complex solution.
www.ariadne.ac.uk /issue41/chapman/intro.html   (2742 words)

  
 No fear of Friday the 13th for triskaidekaphobia expert
He said he first was struck by the unusual power of the number 13 in 1987, which, of course, is 13 years ago.
Wilson considered 13 his lucky number, Fernsler said, and, against the advice of the superstitious captain and crew, ordered that the ship be docked that day instead of waiting until morning.
Fernsler said the screenwriters noted obvious references to the number, such as the mission number, the fact that liftoff was at 1313 hours CST and the fact that the explosion that crippled the spacecraft occurred on April 13.
www.udel.edu /PR/UpDate/01/3/nofear.html   (998 words)

  
 Canada Post - Collecting
The numbers have risen since then, and today, the number of students is approximately 5.3 million.
In 1910, there were 40,000 full-time teachers in Canada, and that number rose to 272,000 in 1976.
The shadow represents any number of teachers in one's education, or a memory of the collective." This is his third stamp project; Koudis designed the 5-stamp Sporting Heroes set for the 1996 Olympic centenary, and the beloved Pablum stamp in the Millennium Collection.
www.canadapost.ca /textonly/personal/collecting/default-e.asp?stamp=stpartl&detail=439   (337 words)

  
 The Straight Dope: Why is the number 13 considered unlucky?
The matter of how 13 came to be a numerological pariah, on the other hand, is an interesting story.
The proximate cause of this apparently was the observation that Judas, the betrayer of Jesus, made 13 at the table.
What's worse, 13 is one past 12, the dozen, almost universally regarded as a perfect number, signifying harmony and all good things.
www.straightdope.com /classics/a3_080.html   (577 words)

  
 eBMJ -- Statistics at Square One: Survival analysis   (Site not responding. Last check: 2007-10-22)
Recent examples include time to discontinuation of a contraceptive, maximum dose of bronchoconstrictor required to reduce a patient's lung function to 80% of baseline, time taken to exercise to maximum tolerance, time that a transdermal patch can be left in place, time for a leg fracture to heal.
The survival curve is unchanged at the time of a censored observation, but at the next event after the censored observation the number of people "at risk" is reduced by the number censored between the two events.
The effect of the censored observations is to reduce the numbers at risk, but they do not contribute to the expected numbers.
bmj.bmjjournals.com /statsbk/12.shtml   (1478 words)

  
 Lit-Net - Content Reader
Number 8 is looking for a Youth Theatre Leader to take on this exciting challenge.
Number 8 is a venue inspired by, fundraised by and run by the local community of Pershore in Worcestershire.
In July 2003 Number 8 closed its doors to embark on a major programme of capital re-development.
www.lit-net.org /index.php?screen=reader&session_string=fpXanQ3IdbHZzH3m&LinkID=2628&viewCat=31   (400 words)

  
 Puzzle 208.  Happy new Year 2003!
What is the least prime number p such that the period of 1/p, in its decimal expansion, is equal to 2003?
Split N into two or more parts all of them prime numbers, which concatenate to N. The splits may be anywhere in N except before a 0.
Minimize the number of primes used in a split.
www.primepuzzles.net /puzzles/puzz_208.htm   (580 words)

  
 DIVINE FEATS   (Site not responding. Last check: 2007-10-22)
Second, the force that powers a divine feat is the ability to channel positive or negative energy to turn or rebuke undead.
Each use of a divine feat costs the character one turn/rebuke attempt from his or her number of attempts each day.
If you're not a cleric, you may choose a number no higher than your effective cleric level (for instance,a paladin could choose a number up to two less than his paladin level).If a prestige class increases your effective turning level, use your effective turning level.
www.freehomepages.com /ace32/at/divinefeats.htm   (780 words)

  
 Pitch Diameter Limits
When ground thread taps are ordered without a pitch diameter or limit number given, the tap pitch diameter will normally be determined from Table 341, and will be marked with the appropriate D limit number.
Special taps are to be marked with the nominal diameter and number of threads per inch and form of thread as specified by the purchaser on his order or blue print provided such specifications are reasonably correct.
Where special taps are ordered without a pitch diameter or limit number given, the pitch diameter will normally be determined from Tables 331 or 341.
www.precisiontwistdrill.com /techhelp/help_pages/pitch_diameter_limits.asp   (595 words)

  
 Citations: The multiple polynomial quadratic sieve - Silverman (ResearchIndex)   (Site not responding. Last check: 2007-10-22)
A recent survey is [7] The particular implementations of ECM by Brent and Montgomery are described in [6, 18] Table 3 shows the number of factors found by several methods in the preparation of Updates 1 3.
By way of background to the number field sieve we now explain the factorisation strategy of algorithms in the family, concentrating on MPQS and the number field sieve.
This implies that the composite numbers N on which the RSA publickey cryptosystem [25, 26] is based should have at least 100 decimal digits if the cryptosystem is to be reasonably secure.
citeseer.ist.psu.edu /context/270989/0   (2122 words)

  
 Bible how many verses chapters tally total count number psalms
However, there is also a substantial number of these extra pieces that are quite lengthy, sometimes explaining the inspiration for the psalm, or the circumstances surrounding its composition.
I feel that this information is very important, and thus I have made the effort to note psalms that include this information, which would otherwise not be reflected in the verse count.
It should also be noted that the total number of psalms with unnumbered verses is actually 116.
www.deafmissions.com /tally/psalms.html   (318 words)

  
 Beyond Schools - Lyric Theatre Hammersmith, London
We work regularly with a number of groups (often at the Lyric), whose participants present a range of social and cultural needs as well as individual interests and talents.
These groups include an after school club for talented children at schools in disadvantaged areas, an Integrated Drama Group (open to disabled and non-disabled adults with an interest in drama) and summer holiday activities for 7-16 year olds (please go to Ages 5-10 and Ages 11-15 for details).
We also provide a number of free tickets for our performances to community groups and target specific groups with support activity from performing companies.
www.lyric.co.uk /p450.html   (197 words)

  
 EAN 13
Normally the number system digit is printed to the left of the barcode, and the check digit to the right.
The number system is the first two digits in the EAN number to identify the country/region numbering authority.
The number system list is maintained by EAN organization (http://www.ean-int.org).
www.morovia.com /education/symbology/ean-13.asp   (658 words)

  
 Number 13   (Site not responding. Last check: 2007-10-22)
Thirteen is the number of hearts in a pack of cards.
There are 13 spirals going anticlockwise and 8 going clockwise.
It is rare for artists to use 13-fold symmetry, perhaps because their clients may be superstitious.
www.nottingham.ac.uk /education/number/Num13.htm   (300 words)

  
 Number 13 - Wikipedia, the free encyclopedia
Number 13 can refer to three different things:
Number 13, a film by Alfred Hitchcock and starring Ernest Thesiger which was shot but never completed.
The footage shot is believed to be lost.
en.wikipedia.org /wiki/Number_13   (102 words)

  
 [No title]   (Site not responding. Last check: 2007-10-22)
When puppet's number of RPs is limited he should move into DCB with the maximum-1 number of RPs (eg.
The reason for this is that the maximum number of RPs is both rare and well-defined (usually only one option).
A useful guide for investigating slam is that the number of RPs and the number of trumps should total 27 or more.
www.culbertsonbc.com /systems/Eclectic-Symmetric-Pass   (6794 words)

  
 Sports Superstitions: The Number 13
So is the number 13 really unlucky, or is it just a myth?
Branca, a pitcher for the Brooklyn Dodgers, wore no. 13 and, as legend has it, playfully posed with fl cats before the 1951 playoffs began.
Now with the Chicago Cubs, Fassero wore no. 13 in 1999 for Seattle and Texas and compiled a 5-14 mark with a 7.20 ERA, the worst major league single-season ERA (for pitchers with 150 innings) since 1937.
www.factmonster.com /spot/superstitions2.html   (380 words)

  
 Prestige Class: AD&D Hall Of Heroes
It is a set of feats permitting you to generate a divine aura ema-nated from your soul as you channel the energy granted by your god.
Benefits: Each feat has different effect and different requisites, but they all ask you to spend a number (depending on aura level) of daily attempts to turn or rebuke undead.
An aura lasts for a number of rounds equal to 3 + your Charisma modifier.
www.hallofhero.com /PC/ViewPressClass.cfm?IDPC=60   (1256 words)

  
 Bolts of Fabric for Sale
Each is a minimum 13 inches wide, though they can be up to 14.5 inches.
The fabric is fairly stiff - and the backside shows the open weave of the colored threads.
Each section is numbered in the top right corner.
www.kyotokimono.com /WhatsForSale/FabricBolts.html   (1059 words)

  
 The Sport Supplement: Volume 13 Number 2
By definition, the glycemic index (GI) is a number given to rank the rate of conversion of carbohydrates to glucose in the body.
This is known as the glycemic response, or the food’s ability to raise blood sugar levels (Healthchecksystems.com, 2005).
These carbohydrates are given a number between 0 and 100, with pure glucose serving as the reference point for GI at 100 (Nutritiondata.com, 2005).
www.thesportjournal.org /sport-supplement/vol13no2/03_glycemic.asp   (861 words)

  
 A Clever Way to Get Your Child Reading: California's Reading List - California - GreatSchools.net
As you decipher the bar graphs and national percentile ranks on your child's STAR report, don't ignore the small print in the lower lefthand corner.
Your child's California Reading List Number is determined by his performance on the reading comprehension portion of the California Standards Test (CST).
This number will lead you to books that match your child's reading level and are appropriate for his age.
www.greatschools.net /cgi-bin/showarticle/CA/170/mss   (425 words)

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