Base 13
Base-13, 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 0-9, A, B and C (similar to base 16). Base 13 is not used in any practical situation.
Positional systems
- Binary1
- Ternary1
- Quaternary1
- Quinary1
- Senary1
- Septenary1
- Octal1
- Nonary1
- Decimal1
- Undecimal1
- Duodecimal1
- Base 131
- Hexadecimal1
- Vigesimal1
Numeral systems
Languages
- Englishone
- Germaneins
- Spanishuno
- Swedishett