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  2. Kaktovik numerals - Wikipedia

    en.wikipedia.org/wiki/Kaktovik_numerals

    30,561 10 3,G81 20 ÷ ÷ ÷ 61 10 31 20 = = = 501 10 151 20 30,561 10 ÷ 61 10 = 501 10 3,G81 20 ÷ 31 20 = 151 20 ÷ = (black) The divisor goes into the first two digits of the dividend one time, for a one in the quotient. (red) fits into the next two digits once (if rotated), so the next digit in the quotient is a rotated one (that is, a five). (blue) The last two digits are matched once for ...

  3. Vigesimal - Wikipedia

    en.wikipedia.org/wiki/Vigesimal

    100 20 is equivalent to four hundred in decimal = (1 × 20 2) + (0 × 20 1) + (0 × 20 0). In the rest of this article below, numbers are expressed in decimal notation, unless specified otherwise. For example, 10 means ten, 20 means twenty. Numbers in vigesimal notation use the convention that I means eighteen and J means nineteen.

  4. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    Such method is 6.7% more efficient than MIME-64 which encodes a 24 bit number into 4 printable characters. 89: Largest base for which all left-truncatable primes are known. 90: Nonagesimal: Related to Goormaghtigh conjecture for the generalized repunit numbers (111 in base 90 = 1111111111111 in base 2). 95: Number of printable ASCII characters ...

  5. List of types of numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_numbers

    Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.

  6. Number - Wikipedia

    en.wikipedia.org/wiki/Number

    Download as PDF; Printable version; ... as part of the general study of number theory. [20] ... Starting with k = 0, the first non-negative odd numbers are {1, 3, 5 ...

  7. 20 (number) - Wikipedia

    en.wikipedia.org/wiki/20_(number)

    Download as PDF; Printable version; In other projects ... 1, 2, 4, 5, 10, 20: ... the number 20 is used as an index in measuring visual acuity. 20/20 indicates normal ...

  8. Chicka Chicka 1, 2, 3 - Wikipedia

    en.wikipedia.org/wiki/Chicka_Chicka_1,_2,_3

    Anthropomorphic numbers from 1 to 20 (including 5 wearing a top hat) in consecutive order, then 30 to 90 by tens (including 70 with long hair), and finally 99, climb up an apple tree. While watching the numbers climb, the number 0 tries to find a place available for him in the tree.

  9. Category:Lists of ambiguous numbers - Wikipedia

    en.wikipedia.org/wiki/Category:Lists_of...

    Print/export Download as PDF; ... Help. This category consists of titles that consist of numbers . Use {} to add "ambiguous ... 4/20; 05; 5 (disambiguation) 005 ...

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