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  2. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    The notations IV and IX can be read as "one less than five" (4) and "one less than ten" (9), although there is a tradition favouring the representation of "4" as "IIII" on Roman numeral clocks. [ 1 ] Other common uses include year numbers on monuments and buildings and copyright dates on the title screens of films and television programmes.

  3. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1. Means "less than or equal to". That is, whatever A and B are, A ≤ B is equivalent to A < B or A = B. 2. Between two groups, may mean that the first one is a subgroup of the second one. ≥ 1. Means "greater than or equal to".

  4. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    "A base is a natural number B whose powers (B multiplied by itself some number of times) are specially designated within a numerical system." [1]: 38 The term is not equivalent to radix, as it applies to all numerical notation systems (not just positional ones with a radix) and most systems of spoken numbers. [1]

  5. List of types of numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_numbers

    Positive numbers: Real numbers that are greater than zero. Negative numbers: Real numbers that are less than zero. Because zero itself has no sign, neither the positive numbers nor the negative numbers include zero. When zero is a possibility, the following terms are often used: Non-negative numbers: Real numbers that are greater than or equal ...

  6. Non-numerical words for quantities - Wikipedia

    en.wikipedia.org/wiki/Non-numerical_words_for...

    10 Primarily denotes ten years, but occasionally refers to ten of something Duo: 2 In reference to people engaged in an endeavor together, as in musical performance (other words denote three or more people in the same context: trio, quartet, etc.) Grand: 1,000 Slang for a thousand of some unit of currency, such as dollars or pounds. Gross: 144

  7. Number - Wikipedia

    en.wikipedia.org/wiki/Number

    Thus 123.456 is considered an approximation of any real number greater or equal to ⁠ 1234555 / 10000 ⁠ and strictly less than ⁠ 1234565 / 10000 ⁠ (rounding to 3 decimals), or of any real number greater or equal to ⁠ 123456 / 1000 ⁠ and strictly less than ⁠ 123457 / 1000 ⁠ (truncation after the 3. decimal). Digits that suggest a ...

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  9. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    In a positional base b numeral system (with b a natural number greater than 1 known as the radix or base of the system), b basic symbols (or digits) corresponding to the first b natural numbers including zero are used. To generate the rest of the numerals, the position of the symbol in the figure is used.