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  2. List of British bingo nicknames - Wikipedia

    en.wikipedia.org/wiki/List_of_British_bingo...

    A half crown is equivalent to 2 shillings and sixpence, written 2/6 and pronounced "two and six". Pick and mix Rhymes with "twenty-six". 27 Duck and a crutch The number 2 looks like a duck (see '2') and the number 7 looks like a crutch. Gateway to Heaven Rhymes with "twenty-seven". 28 In a state "Two and eight" is rhyming slang for "state ...

  3. List of Dewey Decimal classes - Wikipedia

    en.wikipedia.org/wiki/List_of_Dewey_Decimal_classes

    2 Class 100 – Philosophy and psychology. ... 119 Number and quantity; 120 Epistemology. ... 250 Christian orders and local church

  4. Two-out-of-five code - Wikipedia

    en.wikipedia.org/wiki/Two-out-of-five_code

    A two-out-of-five code is a constant-weight code that provides exactly ten possible combinations of two bits, and is thus used for representing the decimal digits using five bits. [1] Each bit is assigned a weight, such that the set bits sum to the desired value, with an exception for zero. According to Federal Standard 1037C : the usual ...

  5. Googol - Wikipedia

    en.wikipedia.org/wiki/Googol

    A googol is the large number 10 100. In decimal notation, ... It is a ratio in the order of about 10 80 to 10 90, or at most one ten-billionth of a googol ...

  6. 0 - Wikipedia

    en.wikipedia.org/wiki/0

    For example, the decimal number 205 is the sum of two hundreds and five ones, with the 0 digit indicating that no tens are added. The digit plays the same role in decimal fractions and in the decimal representation of other real numbers (indicating whether any tenths, hundredths, thousandths, etc., are present) and in bases other than 10 (for ...

  7. Numeral prefix - Wikipedia

    en.wikipedia.org/wiki/Numeral_prefix

    Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. For example: simplex, duplex (communication in only 1 direction at a time, in 2 directions simultaneously) unicycle, bicycle, tricycle (vehicle with 1 wheel, 2 wheels ...

  8. Method of complements - Wikipedia

    en.wikipedia.org/wiki/Method_of_complements

    The nines' complement of a decimal digit is the number that must be added to it to produce 9; the nines' complement of 3 is 6, the nines' complement of 7 is 2, and so on, see table. To form the nines' complement of a larger number, each digit is replaced by its nines' complement. Consider the following subtraction problem:

  9. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    This is the minimum number of characters needed to encode a 32 bit number into 5 printable characters in a process similar to MIME-64 encoding, since 85 5 is only slightly bigger than 2 32. Such method is 6.7% more efficient than MIME-64 which encodes a 24 bit number into 4 printable characters. 89