To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

# 50 (number)

 ← 49 50 51 →
Cardinalfifty
Ordinal50th
(fiftieth)
Numeral systemquinquagesimal
Factorization2 × 52
Divisors1, 2, 5, 10, 25, 50 0
Greek numeralΝ´
Roman numeralL
Unicode symbol(s)
Binary1100102
Ternary12123
Quaternary3024
Quinary2005
Senary1226
Octal628
Duodecimal4212
Vigesimal2A20
Base 361E36

50 (fifty) is the natural number following 49 and preceding 51.

• 1/5
Views:
2 712
151 453
532
75 747
509
• ✪ Angel Number 50: The Meanings of Angel Number 50
• ✪ Candybots Numbers 123 - Learn counting 50 to 60 number - Education Apps for Kids
• ✪ Comparing Numbers - Numbers up to 50 (number grid)
• ✪ Special : SSC GD Cut oFF केवल 40-50 Number वालो के लिए | SSC GD Cut off 2019 With Full Analysis
• ✪ Ordering Numbers - Numbers up to 50 (number grid)

## In mathematics

Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways: 50 = 12 + 72 = 52 + 52.[1] It is also the sum of three squares, 50 = 32 + 42 + 52, and the sum of four squares, 50 = 62 + 32 + 22 + 12. It is a Harshad number.[2]

There is no solution to the equation φ(x) = 50, making 50 a nontotient.[3] Nor is there a solution to the equation x − φ(x) = 50, making 50 a noncototient.[4]

## In other fields

Fifty is:

• There are 50 states in the United States of America. The TV show Hawaii Five-O and its reimagined version, Hawaii Five-0, are so called because Hawaii is the last (50th) of the states to officially become a state.
• 5-O (Five-Oh) - Slang for police officers and/or a warning that police are approaching. Derived from the television show Hawaii Five-O[7]
• A calibre of ammunition (0.50 inches: see .50 BMG)
• In millimetres, the focal length of the normal lens in 35 mm photography
• The percentage (50%) equivalent to one half, so that the phrase "fifty-fifty" commonly expresses something divided equally in two; in business this is often denoted as being the ultimate in equal partnership
• In years of marriage, the gold or "golden" wedding anniversary
• Nickname 50 Cent, a rapper.
• A Canadian brand of beer called 50 Ale created in 1950 by Labatt breweries to commemorate 50 years of partnership. It is a popular brand still sold today.
• The speed limit, in kilometres per hour, of Australian and Canadian roads with unspecified limits.
• In the 1994 action movie Speed, which depicts a Los Angeles cop (Keanu Reeves), who must rescue civilians on a bus that has a bomb rigged to it which will detonate if the bus's speed drops below 50 mph.

## References

1. ^ de Koninck, J.M. (2009). Those fascinating numbers. AMS Bookstore. p. 18. ISBN 0-8218-4807-0.
2. ^ "Sloane's A005349 : Niven (or Harshad) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
3. ^ "Sloane's A005277 : Nonients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
4. ^ "Sloane's A005278 : Noncotients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
5. ^ Adkison, Linda (2011). Elsevier's Integrated Review Genetics. p. 42.
6. ^ Leviticus 25:10
7. ^ Karen Rhodes (1 February 1997). Booking Hawaii Five-O: An Episode Guide and Critical History of the 1968–1980 Television Detective Series. McFarland. p. 265. ISBN 978-0-7864-8666-3.