20 (عشرون) هو عدد صحيح يلي العدد 19 ويسبق العدد 21 وهو عدد طبيعي موجب. العدد ليس أولي لكنه يقسم على الأرقام 1، 2، 4، 5، 10، ونفسه بدون باقي.

← 19 20 21 →
كميخطأ: الوظيفة "numeral_to_arabic" غير موجودة.
ترتيبي20
(خطأ: الوظيفة "numeral_to_arabic" غير موجودة.)
نظام العدvigesimal
التحليل لعوامل22× 5
القواسم1, 2, 4, 5, 10, 20
العدد اليونانيΚ´
العدد الرومانيXX
ثنائي101002
ثلاثي2023
رباعي1104
خماسي405
سداسي326
ثماني248
اثنا عشري1812
ستة عشري1416
عشريني1020
أساس 36K36

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في الرياضيات

 
An icosahedron has 20 faces.


في العلوم

في علم الأحياء

  • The number of proteinogenic amino acids that are encoded by the standard genetic code.
  • In some countries, the number 20 is used as an index in measuring visual acuity. 20/20 indicates normal vision at 20 feet, although it is commonly used to mean "perfect vision". (Note that this applies only to countries using the Imperial system. The metric equivalent is 6/6.) When someone is able to see only after an event how things turned out, that person is often said to have had "20/20 hindsight".[11]

كعدد غير محدد

  • A 'score' is a group of 20 (often used in combination with a cardinal number, i.e. fourscore to mean 80),[12] but also often used as an indefinite number[13] (e.g. the newspaper headline "Scores of Typhoon Survivors Flown to Manila").[14]

في الرياضة

 
A standard dartboard is laid out as 20 sectors.

العمر 20

الموسيقى

Albums
20 Related Twenty Related
Harry Connick, Jr.[23] 20+ Baron Rojo[24] Bob Baldwin[25] Twenty+ All-4-One[26]
Orbital[27] 20% Maria Bamford[28] Boyz II Men[29] 20 [Twenty] FT Island[30]
TLC[31] Chicane[32]
Jars of Clay[33] Robert Cray[34]
Africa Unite[35] Jebediah[36]
Kate Rusby[37] Lynyrd Skynyrd[38]
Hyukoh[39] Taking Back Sunday[40]
Pastora Soler[41]
The Gift[42]
Sofa Surfers[43]
Capo Plaza[44]
John Dahlbäck[45]
Songs
20 Related Twenty
Ebbo Kraan[46] #20 - Fat Tuesday[47] The Rippingtons[48]
Seventeen[49] #20 - Aphex Twin[50]
Janet Jackson[51] #20 - Tony Wilson Sextet[52]
Gorky's Zygotic Mynci[53] #20 - David Paul Mesler[54]
Covenant[55] $20 - Low (band)[56]
Car 44[57] $20 - Qwiksand[58]
Karma to Burn[59] $20 - Norman Palm[60]
Ike Yard[61] 20% - Furyus[62]
Noah Stone[63] 20% - Banfi[64]
Alec Empire[65] -20 - Brendon Moeller[66]
Beans[67] -20 - Mr. 76ix[68]
Damián Schwartz[69] 20 (intro) - Janet Jackson[70]
Anarchestra[71] 20 (Palbarrio) - El Barrio[72]


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في الحقول الأخرى

انظر أيضاً

المراجع

  1. ^ "Sloane's A002378: Pronic numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2020-11-30.
  2. ^ "Sloane's A000292 : Tetrahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  3. ^ Weisstein, Eric W. "Vigesimal". mathworld.wolfram.com (in الإنجليزية). Retrieved 2020-08-16.
  4. ^ "Sloane's A071395 : Primitive abundant numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  5. ^ Weisstein, Eric W. "Icosahedron". mathworld.wolfram.com (in الإنجليزية). Retrieved 2020-08-16.
  6. ^ Weisstein, Eric W. "Dodecahedron". mathworld.wolfram.com (in الإنجليزية). Retrieved 2020-08-16.
  7. ^ Dunlap, R. A. (1997). The Golden Ratio and Fibonacci Numbers (in الإنجليزية). World Scientific. pp. 72–73. ISBN 978-981-238-630-4.
  8. ^ "God's Number is 20". Cube20.org
  9. ^ Jonathan Fildes (August 11, 2010). "Rubik's Cube quest for speedy solution comes to an end". BBC News.
  10. ^ قالب:Cite OEIS
  11. ^ "Definition of 20/20". www.merriam-webster.com (in الإنجليزية). Retrieved 2020-08-16.
  12. ^ "Definition of SCORE". www.merriam-webster.com (in الإنجليزية). Retrieved 2020-08-16.
  13. ^ "Biblical Criticism", The Classical Journal 36:71:83ff (March 1827) full text
  14. ^ "CBS News", Scores of Typhoon Survivors Flown to Manila (November 2013)
  15. ^ Cleaver, Dylan (2010-11-03). Brendon McCullum: Inside Twenty20 (in الإنجليزية). Hachette New Zealand. ISBN 978-1-86971-238-9.
  16. ^ Ziemba, William T. (2017-08-23). The Adventures Of A Modern Renaissance Academic In Investing And Gambling (in الإنجليزية). World Scientific. p. 352. ISBN 978-981-314-853-6. It has always been for a long time a maximum of 20 horses ...
  17. ^ Jordan, Bill. Opening Moves Made Easy: A new way to learn how to play Chess openings (in الإنجليزية). Bill Jordan. there are 20 legal moves for White and 20 legal replies for Black
  18. ^ Draper, Nick (2014-12-05). Exercise Physiology: For Health and Sports Performance (in الإنجليزية). Routledge. p. 404. ISBN 978-1-317-90260-7. played over four 20 min quarters
  19. ^ Harari, P. J.; Ominsky, Dave (2002). Basketball Made Simple: A Spectator's Guide (in الإنجليزية). First Base Sports, Inc. p. 58. ISBN 978-1-884309-13-7. Duration two 20-min. halves
  20. ^ "International Ice Hockey Federation - Olympic Sport". International Olympic Committee (in الإنجليزية). 9 November 2020. Retrieved 22 January 2021.
  21. ^ "Adulthood | Introduction to Psychology". lumenlearning.com.
  22. ^ "Japan's Age of Majority Changed to 18 - Living the Japon.com". www.japan-experience.com. Retrieved 19 March 2018.
  23. ^ (in en-us)20 - Harry Connick, Jr. | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0000197963, retrieved on 2020-08-16 
  24. ^ (in en-us)20+ - Baron Rojo | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20--mw0000502631, retrieved on 2020-08-16 
  25. ^ (in en-us)Twenty - Bob Baldwin | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty-mw0002562550, retrieved on 2020-08-16 
  26. ^ (in en-us)Twenty + - All-4-One | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty--mw0002860666, retrieved on 2020-08-17 
  27. ^ (in en-us)20 - Orbital | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0000820901, retrieved on 2020-08-16 
  28. ^ (in en-us)20 - Harry Connick, Jr. | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0000197963, retrieved on 2020-08-16 
  29. ^ (in en-us)Twenty - Boyz II Men | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty-mw0002228446, retrieved on 2020-08-16 
  30. ^ (in en-us)20 (Twenty) - FT Island | User Reviews | AllMusic, https://www.allmusic.com/album/20-twenty-mw0002383904, retrieved on 2020-08-17 
  31. ^ (in en-us)20 - TLC | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0002582805, retrieved on 2020-08-16 
  32. ^ (in en-us)Twenty - Chicane | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty-mw0002950193, retrieved on 2020-08-17 
  33. ^ (in en-us)20 - Jars of Clay | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0002697748, retrieved on 2020-08-16 
  34. ^ (in en-us)Twenty - Robert Cray | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty-mw0000655580, retrieved on 2020-08-16 
  35. ^ (in en-us)20 - Africa Unite | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0000770616, retrieved on 2020-08-16 
  36. ^ (in en-us)Twenty - Jebediah | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty-mw0002852415, retrieved on 2020-08-17 
  37. ^ (in en-us)20 - Kate Rusby | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0002421041, retrieved on 2020-08-16 
  38. ^ (in en-us)Twenty - Lynyrd Skynyrd | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty-mw0000019811, retrieved on 2020-08-16 
  39. ^ (in en-us)20 - Hyukoh | User Reviews | AllMusic, https://www.allmusic.com/album/20-mw0002789091, retrieved on 2020-08-16 
  40. ^ (in en-us)Twenty - Taking Back Sunday | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/twenty-mw0003222461, retrieved on 2020-08-16 
  41. ^ (in en-us)20 - Pastora Soler | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0002806348, retrieved on 2020-08-16 
  42. ^ (in en-us)20 - The Gift | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0002904271, retrieved on 2020-08-16 
  43. ^ (in en-us)20 - Sofa Surfers | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0003108077, retrieved on 2020-08-17 
  44. ^ (in en-us)20 - Capo Plaza | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0003171370, retrieved on 2020-08-17 
  45. ^ (in en-us)20 - John Dahlbäck | Songs, Reviews, Credits | AllMusic, https://www.allmusic.com/album/20-mw0000477712, retrieved on 2020-08-17 
  46. ^ (in en-us)20 - Ebbo Kraan | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0052047171, retrieved on 2020-08-17 
  47. ^ (in en-us)#20 - Fat Tuesday | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0005944451, retrieved on 2020-08-17 
  48. ^ (in en-us)Twenty - The Rippingtons | Song Info | AllMusic, https://www.allmusic.com/song/twenty-mt0014932378, retrieved on 2020-08-17 
  49. ^ (in en-us)20 - Seventeen | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0056556768, retrieved on 2020-08-17 
  50. ^ (in en-us)#20 - Aphex Twin | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0046455451, retrieved on 2020-08-17 
  51. ^ (in en-us)20 - Janet Jackson | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0055814541, retrieved on 2020-08-17 
  52. ^ (in en-us)#20 - Tony Wilson Sextet | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0001927539, retrieved on 2020-08-17 
  53. ^ (in en-us)20 - Gorky's Zygotic Mynci | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0004066565, retrieved on 2020-08-17 
  54. ^ (in en-us)# 20 - David Paul Mesler | Song Info | AllMusic, https://www.allmusic.com/song/-20-mt0018091631, retrieved on 2020-08-17 
  55. ^ (in en-us)20 - Covenant | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0007053254, retrieved on 2020-08-17 
  56. ^ (in en-us)$20 - Low | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0046418944, retrieved on 2020-08-17 
  57. ^ (in en-us)20 - Car 44 | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0006363298, retrieved on 2020-08-17 
  58. ^ (in en-us)$20 - Qwiksand | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0005300993, retrieved on 2020-08-17 
  59. ^ (in en-us)20 - Karma to Burn | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0041540579, retrieved on 2020-08-17 
  60. ^ (in en-us)$20 - Norman Palm | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0040418082, retrieved on 2020-08-17 
  61. ^ (in en-us)20 - Ike Yard | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0000066967, retrieved on 2020-08-17 
  62. ^ (in en-us)20% - Furyus | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0020506978, retrieved on 2020-08-17 
  63. ^ (in en-us)20 - Noah Stone | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0006708807, retrieved on 2020-08-17 
  64. ^ (in en-us)20% - Banfi | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0056659907, retrieved on 2020-08-17 
  65. ^ (in en-us)20 - Alec Empire | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0001655781, retrieved on 2020-08-17 
  66. ^ (in en-us)-20 - Brendon Moeller | Song Info | AllMusic, https://www.allmusic.com/song/-20-mt0010099433, retrieved on 2020-08-17 
  67. ^ (in en-us)20 - Beans | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0004681425, retrieved on 2020-08-17 
  68. ^ (in en-us)-20 - Mr. 76ix | Song Info | AllMusic, https://www.allmusic.com/song/-20-mt0043201522, retrieved on 2020-08-17 
  69. ^ (in en-us)20 - Damián Schwartz | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0010128491, retrieved on 2020-08-17 
  70. ^ (in en-us)20 (Intro) - Janet Jackson | Song Info | AllMusic, https://www.allmusic.com/song/20-intro-mt0004429737, retrieved on 2020-08-17 
  71. ^ (in en-us)20 - Anarchestra | Song Info | AllMusic, https://www.allmusic.com/song/20-mt0019781780, retrieved on 2020-08-17 
  72. ^ (in en-us)20 (Palbarrio) - El Barrio | Song Info | AllMusic, https://www.allmusic.com/song/20-palbarrio-mt0015536008, retrieved on 2020-08-17 
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  77. ^ Toone, Matthew (2009). Great Games!: 175 Games and Activities for Families, Groups and Children (in الإنجليزية). Great Games Book. p. 145. ISBN 978-0-9798345-5-4. Much like the classic game of 20 Questions,...

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