Numeral systems by culture  

HinduArabic numerals  
Eastern Arabic Indian family Khmer 
Mongolian Thai Western Arabic 
East Asian numerals  
Chinese Counting rods Japanese 
Korean Suzhou 
Alphabetic numerals  
Abjad Armenian Āryabhaṭa Cyrillic 
Ge'ez Greek (Ionian) Hebrew 
Other systems  
Attic Babylonian Brahmi Egyptian Etruscan Inuit 
Mayan Quipu Roman Urnfield 
List of numeral system topics  
Positional systems by base  
Decimal (10)  
1, 2, 3, 4, 5, 8, 12, 16, 20, 60 more…  
Nonary is a base9 numeral system, typically using the digits 08, but not the digit 9.
The first few numbers in nonary and decimal are:
Nonary  1  2  3  4  5  6  7  8  10  11  12  13  14 
Decimal  1  2  3  4  5  6  7  8  9  10  11  12  13 
The multiplication table in nonary is:
*  1  2  3  4  5  6  7  8 
1  1  2  3  4  5  6  7  8 
2  2  4  6  8  11  13  15  17 
3  3  6  10  13  16  20  23  26 
4  4  8  13  17  22  26  31  35 
5  5  11  16  22  27  33  38  44 
6  6  13  20  26  33  40  46  53 
7  7  15  23  31  38  46  54  62 
8  8  17  26  35  44  53  62  71 
Nonary notation can be used as a concise representation of ternary data. This is similar to using quaternary notation for binary data, though the digit set is closer in size to octal.
Except for three, no primes in nonary end in 0, 3 or 6, since any nonary number ending in 0, 3 or 6 is divisible by three.
A nonary number is divisible by two, four or eight, if the sum of its digits is also divisible by two, four or eight respectively.
If x is a triangular number, so is 9x+1. This means that one finds 3, 31, 311, 3111, 31111... in the triangular numbers. Likewise, 6, 61, 611, 6111, ....
The Nonary system of notation is used by the fictional civilization, The Culture, found in Iain M. Banks' books.
