Numeral systems by culture  HinduArabic numerals  Western Arabic Eastern Arabic Khmer  Indian family Brahmi Thai  East Asian numerals  Chinese Japanese  Korean  Alphabetic numerals  Abjad Armenian Cyrillic Ge'ez  Hebrew Ionian/Greek Sanskrit  Other systems  Attic Etruscan Roman  Babylonian Egyptian Mayan  List of numeral system topics  Positional systems by base  Decimal (10)  2, 4, 8, 16, 32, 64, 128  3, 9, 12, 24, 30, 36, 60, more…  v • d • e  Base13, tridecimal, or tredecimal is a positional numeral system with thirteen as its base. It uses 13 different digits for representing numbers. Suitable digits for base 13 could be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, X, E and T (similar to base 12) or 09, A, B and C (similar to base 16). A numeral is a symbol or group of symbols, or a word in a natural language that represents a number. ...
The HinduArabic numeral system (also called Algorism) is a positional decimal numeral system documented from the 9th century. ...
Numerals sansserif Arabic numerals, known formally as HinduArabic numerals, and also known as Indian numerals, Hindu numerals, Western Arabic numerals, European numerals, or Western numerals, are the most common symbolic representation of numbers around the world. ...
The Eastern Arabic numerals (also called Eastern Arabic numerals, ArabicIndic numerals, Arabic Eastern Numerals) are the symbols (glyphs) used to represent the HinduArabic numeral system in conjunction with the Arabic alphabet in Egypt, Iran, Pakistan and parts of India, and also in the no longer used Ottoman Turkish...
Khmer numerals are the numerals used in the Khmer language of Cambodia. ...
India has produced many numeral systems. ...
The Brahmi numerals are an indigenous Indian numeral system attested from the 3rd century BCE (somewhat later in the case of most of the tens). ...
The Abjad numerals are a decimal numeral system which was used in the Arabicspeaking world prior to the use of the HinduArabic numerals from the 8th century, and in parallel with the latter until Modern times. ...
Cyrillic numerals was a numbering system derived from the Cyrillic alphabet, used by South and East Slavic peoples. ...
Note: This article contains special characters. ...
The system of Hebrew numerals is a quasidecimal alphabetic numeral system using the letters of the Hebrew alphabet. ...
Greek numerals are a system of representing numbers using letters of the Greek alphabet. ...
The Sanskrit alphabetic numerals were created in about A.D. 510 by Ä€ryabhaa. ...
Attic numerals were used by ancient Greeks, possibly from the 7th century BC. They were also known as Herodianic numerals because they were first described in a 2nd century manuscript by Herodianus. ...
The Etruscan numerals were used by the ancient Etruscans. ...
The system of Roman numerals is a numeral system originating in ancient Rome, adapted from Etruscan numerals. ...
Babylonian numerals were written in cuneiform, using a wedgetipped reed stylus to make a mark on a soft clay tablet which would be exposed in the sun to harden to create a permanent record. ...
Mayan numerals. ...
This is a list of numeral system topics, by Wikipedia page. ...
Positional notation is a system in which each position has a value represented by a unique symbol or character. ...
The radix (Latin for root), also called base, is the number of various unique symbols (or digits or numerals) a positional numeral system uses to represent numbers. ...
The decimal (base ten or occasionally denary) numeral system has ten as its base. ...
The binary numeral system (base 2 numerals) represents numeric values using two symbols, typically 0 and 1. ...
Quaternary is the base four numeral system. ...
The octal numeral system is the base8 number system, and uses the digits 0 to 7. ...
In mathematics and computer science, base16, hexadecimal, or simply hex, is a numeral system with a radix or base of 16 usually written using the symbols 0â€“9 and Aâ€“F or aâ€“f. ...
Base32 is a derivation of Base64 with the following additional properties: The resulting character set is all uppercase, which can often be beneficial when using a casesensitive filesystem. ...
Base 64 is a positional numeral system using a base of 64. ...
Uuencode is a form of ASCII armor that originated as a Unix program for encoding binary data for transmission over the uucp mail system. ...
Ternary or trinary is the base3 numeral system. ...
Nonary is a base 9 numeral system, typically using the digits 08, but not the digit 9. ...
A duodecimal multiplication table The duodecimal (also known as base12 or dozenal) system is a numeral system using twelve as its base. ...
As there are 24 hours in a day a numbering system based upon 24, and as the base 12 is convenient here some examples of the base 24 (quadrovigesimal) system. ...
Base 30 or trigesimal is a positional numeral system using 30 as the radix. ...
Base 36 refers to a positional numeral system using 36 as the radix. ...
The sexagesimal (basesixty) is a numeral system with sixty as the base. ...
Positional notation is a system in which each position has a value represented by a unique symbol or character. ...
A numeral is a symbol or group of symbols, or a word in a natural language that represents a number. ...
13 (thirteen) is the natural number following 12 and preceding 14. ...
The radix (Latin for root), also called base, is the number of various unique symbols (or digits or numerals) a positional numeral system uses to represent numbers. ...
13 (thirteen) is the natural number following 12 and preceding 14. ...
Duodecimal is a base 12 numeral system. ...
In mathematics, hexadecimal or simply hex is a numeral system with a radix or base of 16 usually written using the symbols 0–9 and A–F or a–f. ...
Base 13 in fiction
In the end of The Restaurant at the End of the Universe by Douglas Adams, a possible question to get the answer "fortytwo" is presented: "What do you get if you multiply six by nine?" Of course, the answer is deliberately wrong, creating a humorous effect – if the calculation is carried out in base 10. People who were trying to find a deeper meaning in the passage soon noticed that in base 13, 6 × 9 is actually 42 (as 4 × 13 + 2 = 54). When confronted with this, the author stated that it was a mere coincidence, and that "Nobody writes jokes in base 13 [...] I may be a pretty sad person, but I don't make jokes in base 13." See also The Answer to Life, the Universe, and Everything. The Restaurant at the End of the Universe (1980, ISBN 0345391810) is the second book in the Hitchhikers Guide to the Galaxy comedy science fiction series by Douglas Adams. ...
Douglas NoÃ«l Adams (11 March 1952 â€“ 11 May 2001) was a British author, comic radio dramatist, and amateur musician. ...
The decimal (base ten or occasionally denary) numeral system has ten as its base. ...
The Answer to The Ultimate Question Of Life, the Universe and Everything is a fictional solution in Douglas Adamss science fiction series The Hitchhikers Guide to the Galaxy. ...
The notion of Base 13 can also be attributed to the fact that John R. has a little baby penis, commonly used to have his way with other gentlemen at his leisure, or to be kind and clean food from betwixt a bedfellows teeth. Whatever the reason, he just can't seem to escape the grip of shame he feels about his less than perfect member. Poor John, never able to satisfy anyone... John: "EXCEPT YOUR MOM!"... Good one.
Base 13based Calendar The Maya calendar used a base 13 system (the trecena), with 13x20 days for the Tzolkin cycle. The Maya calendar is actually a system of distinct calendars and almanacs used by the Maya civilization of preColumbian Mesoamerica, and by some modern Maya communities in highland Guatemala. ...
A trecena is a subdivision used in preColumbian Mesoamerican calendars, which divides the 260day calendar into 20 periods of 13 days each. ...
Tzolkin is the name given to the 260day sacred calendar of the Maya. ...
External links  http://tortuga.com
 http://lawoftime.org
