A page of the Numeropedia - the Special Encyclopedia of Numbers
[Arts] The number of stars (together with a Moon) in Vincent van Gogh’s famous painting Starry Night.
[Calendar] The number of days added to the calendar for any country to adopt to the Gregorian calendar (created by Pope Gregory XIII in 1582 to reform the old Julian calendar) during the 18th century, (since 1700 was not leap year). Those countries are: Protestant Germany countries in 1700 (after February), the Great Britain and its English colonies in 1752 (then 3 September became 14 September), Sweden in 1753…
[Calendar] November was meant the 9th month in Latin.
[Calendar] The U.S. Veterans Day is on 11 November, (excepted in the years 1971-1977, on the 4th Monday of October). Also, Canada’s Rememberance Day.
[Calendar] November’s birthstone is topaz or citrine (for loyalty).
November’s flower is chrysanthemum. November’s full moon is named “Beaver Moon”.
November’s full moon is named “Beaver Moon”.
[Chemistry] The atomic number of Sodium (Na).
[EECS] In hexadecimal number system, B = 11.
[EECS] 11(W, KW or MW) is one of standard numerical values for resistors (of tolerance class 5%).
[Flag] The number of points on the maple leaf on the Canada’s national flag.
[Geology] The number of official world time zones covered by Russia, the most by a country. The whole country is on permanent Daylight Saving Time and is one hour ahead of their actual zones.
[History] New York was the 11th state to ratify the U.S. Constitution to join the Union, on 6 July 1788.
[History] The 11th U.S. President: James Knox Polk (Democrat, North Carolina, 1845-1849).
His Vice President, George Mifflin Dallas (Pennsylvania), was the 11th U.S. Vice President.
[History] November is the U.S. National American Indian and Alaska Native Heritage month.
[Language] Prefixes: Unde-, Undec-, Hendec-, Hendeca-…
[Language] The “11th hour” usually means the last hour effort/situation. As does the 23rd hour.
[Language] ”Five plus Six” or ”Two plus Nine” each has 11 English letters. Hence it is an "honest" number.
[Measure] The 11 o’clock direction is 30o to the left.
[Movie] Names of TV shows/series or movies: “Ocean’s Eleven” and its sequel “Ocean’s Twelve” and “Ocean’s Thirteen”.
[Phone] The number of digits needed to dial a long distance telephone number (between two different areas codes) in the U.S. and Canada: 1 and 3-digit area code and 7-digit telephone number.
[Phone] The last 2 digits of an NANPA/U.S. area code cannot be the same, i.e. cannot be: 11, 22, 33, 44, 55, 66, 77, 88 or 99. (NANPA: North American Numbering Plan Administration).
[Phone] International telephone access code from a U.S. phone line.
[Trivia] The 11th wedding anniversary is traditionally named steel anniversary. Modernly, it may be replaced by fashion jewelry (or turquoise).
[Trivia] The Kentucky Fried Chicken (KFC) secret handwritten recipe, developed by its founder, Colonel Harland Sanders, consists of 11 herbs and spices.
[World] The number of members of the OPEC (Organization of Petroleum Exporting Countries): Algeria, Indonesia, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, the United Arab Emirates and Venezuela. They hold 2/3 of the world’s oil reserves and make 40% of world’s oil production.
[Zip] The U.S. Post Office uses 5-digit Zip Codes, 9-digit Zip+4 Codes and the newer 11-digit delivery point barcodes.
[Phone] The emergency telephone numbers dialing within Peru are 011 and 5114.
[Astronomy] The escape speed at the Earth’s surface is 11.2 km/s (kilometers/second) = 6.95 miles/second.