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285 (number)

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← 284 285 286 →
Cardinaltwo hundred eighty-five
Ordinal285th
(two hundred eighty-fifth)
Factorization3 × 5 × 19
Divisors1, 3, 5, 15, 19, 57, 95, 285
Greek numeralΣΠΕ´
Roman numeralCCLXXXV
Binary1000111012
Ternary1011203
Senary11536
Octal4358
Duodecimal1B912
Hexadecimal11D16

285 is the natural number following 284 and preceding 286.

In mathematics

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In technology

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  • The Turbojet 285 is a variation of the Williams Jet Tenders motorboat that is smaller than its other designs. It is designed for personal use.[8]
  • In North America, the area code 285 does not exist. If you are receiving a call from a number that begins with 285, it is likely a spam call.[9]

World Records

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  • On December 9, 2022, Peter Thomson received the Guinness World Record for the greatest number of crossovers while jumping rope in a row.[10]
  • On October 7, 2015, Camelot UK Lotteries Limited achieved the Guinness World Record for the longest champagne cork popping relay.[11]
  • The Guinness World Record for the greatest number of people in an online video toast chain as of December 16, 2022, is 285. It was achieved in Cereser, Brazil.[12]
  • On April 12, 2018, the Narraghmore Vintage Club received the Guinness World Record for having the largest parade of 285 tractors

Other fields

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References

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  1. ^ "Composite numbers". mathworld.wolfram.com.
  2. ^ "Square pyramidal number sequence". marhworld.wolfram.com.
  3. ^ "Binary rooted tree". mathworld.wolfram.com.
  4. ^ "Sphenic numbers". mathworld.wolfram.com.
  5. ^ "Harshad numbers". mathworld.wolfram.com.
  6. ^ "Repdigit numbers". mathworld.wolfram.com.
  7. ^ Sloane, N. J. A. (ed.). "Sequence A053701 (Vertically symmetric numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  8. ^ "Turbojet 285 Williams Jet Tenders motorboat". www.williamsjettenders.com.
  9. ^ "Area code 285". www.areacodehelp.com.
  10. ^ "Guinness World Record 285 crossovers whil jumping rope". www.guinnessworldrecords.com.
  11. ^ "Cork popping relay record". www.guinnessworldrecords.com.
  12. ^ "285 people in a video toast chain". www.guinnessworldrecords.com.
  13. ^ "French Republican Calendar Guide" (PDF). broadcast.lds.org.
  14. ^ "285 Regina". in-the-sky.org.
  15. ^ "285th Civil Engineering Squadron". vi.ng.mil.
  16. ^ "Interstate 285 is the most dangerous highway in the United States". www.schollelaw.com. 27 September 2021.