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Base Name Usage 2: Dyadic number: 3: Triadic number: 4: Tetradic number: the same as dyadic number 5: Pentadic number: 6: Hexadic number: not a field: 7: Heptadic number: 8: Octadic number: the same as dyadic number 9: Enneadic number: the same as triadic number 10: Decadic number: not a field 11: Hendecadic number: 12: Dodecadic number: not a ...
Undecimal (also known as unodecimal, undenary, and the base 11 numeral system) is a positional numeral system that uses eleven as its base. While no known society counts by elevens, two are purported to have done so: the Māori (one of the two Polynesian peoples of New Zealand ) and the Pañgwa (a Bantu -speaking people of Tanzania ).
For example, "11" represents the number eleven in the decimal or base-10 numeral system (today, the most common system globally), the number three in the binary or base-2 numeral system (used in modern computers), and the number two in the unary numeral system (used in tallying scores). The number the numeral represents is called its value.
But if the number-base is increased to 11, say, by adding the digit "A", then the same three positions, maximized to "AAA", can represent a number as great as 1330. We could increase the number base again and assign "B" to 11, and so on (but there is also a possible encryption between number and digit in the number-digit-numeral hierarchy).
Negative base numeral system (base −3) Quaternary numeral system (base 4) Quater-imaginary base (base 2 √ −1) Quinary numeral system (base 5) Pentadic numerals – Runic notation for presenting numbers; Senary numeral system (base 6) Septenary numeral system (base 7) Octal numeral system (base 8) Nonary (novenary) numeral system (base 9 ...
Decimal: The standard Hindu–Arabic numeral system using base ten. Binary: The base-two numeral system used by computers, with digits 0 and 1. Ternary: The base-three numeral system with 0, 1, and 2 as digits. Quaternary: The base-four numeral system with 0, 1, 2, and 3 as digits.
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Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.