| Numeral systems by culture |
| Hindu-Arabic numerals |
Western Arabic
Eastern Arabic
Khmer |
Indian family
Brahmi
Thai |
| East Asian numerals |
Chinese
Suzhou
Counting rods |
Japanese
Korean |
| Alphabetic numerals |
Abjad
Armenian
Cyrillic
Ge'ez |
Hebrew
Greek (Ionian)
Āryabhaṭa
|
| Other systems |
Attic
Babylonian
Egyptian
Etruscan |
Mayan
Roman
Urnfield |
| List of numeral system topics |
| Positional systems by base |
| Decimal (10) |
| 2, 4, 8, 16, 32, 64 |
| 1, 3, 9, 12, 20, 24, 30, 36, 60, more… |
|
|
Nonary is a base-9 numeral system, typically using the digits 0-8, 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 are also divisible by two, four or eight respectively.
[edit] See also
Página espejo de la Wikipedia
Directorio de Enlaces Directorio dmoz Directorio espejo dmoz Pedro Bernardo
|