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  2. Binary number - Wikipedia

    en.wikipedia.org/wiki/Binary_number

    A binary number is a number expressed in the base-2 numeral system or binary numeral system, ... 11: 1011: 12: 1100: 13: 1101: 14: 1110: 15: 1111:

  3. Duodecimal - Wikipedia

    en.wikipedia.org/wiki/Duodecimal

    The duodecimal system, also known as base twelve or dozenal, is a positional numeral system using twelve as its base.In duodecimal, the number twelve is denoted "10", meaning 1 twelve and 0 units; in the decimal system, this number is instead written as "12" meaning 1 ten and 2 units, and the string "10" means ten.

  4. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    The smallest base greater than binary such that no three-digit narcissistic number exists. 80: Octogesimal: Used as a sub-base in Supyire. 85: Ascii85 encoding. 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 ...

  5. Pernicious number - Wikipedia

    en.wikipedia.org/wiki/Pernicious_number

    The first pernicious number is 3, since 3 = 11 2 and 1 + 1 = 2, which is a prime. The next pernicious number is 5, since 5 = 101 2 , followed by 6 (110 2 ), 7 (111 2 ) and 9 (1001 2 ). [ 2 ] The sequence of pernicious numbers begins

  6. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    So binary numbers are "base-2"; octal numbers are "base-8"; decimal numbers are "base-10"; and so on. ... 0x9 = 9 0xA = 10 0xB = 11 0xC = 12 0xD = 13 0xE = 14 0xF ...

  7. Binary-coded decimal - Wikipedia

    en.wikipedia.org/wiki/Binary-coded_decimal

    A "12 zone" punch set both B and A, an "11 zone" set B, and a "0 zone" (a 0 punch combined with any others) set A. Thus the letter A, which is (12,1) in the punched card format, is encoded (B,A,1). The currency symbol $, (11,8,3) in the punched card, was encoded in memory as (B,8,2,1). This allows the circuitry to convert between the punched ...

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    mail.aol.com/?rp=webmail-std/en-us/basic

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  9. Computer number format - Wikipedia

    en.wikipedia.org/wiki/Computer_number_format

    Similar binary floating-point formats can be defined for computers. There is a number of such schemes, the most popular has been defined by Institute of Electrical and Electronics Engineers (IEEE). The IEEE 754-2008 standard specification defines a 64 bit floating-point format with: an 11-bit binary exponent, using "excess-1023" format.