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  2. Bulls and cows - Wikipedia

    en.wikipedia.org/wiki/Bulls_and_Cows

    It is exactly like the numerical version, except instead of four-digit numbers, four-letter words are used. They must be real words, according to whatever language or languages the game is being played in. Alternative versions of the game can be played with three-letter or five-letter words, but the four-letter version remains the most popular one.

  3. Polybius square - Wikipedia

    en.wikipedia.org/wiki/Polybius_square

    The device partitioned the alphabet into five tablets with five letters each (except for the last one with only four). There are no surviving tablets from antiquity. Letters are represented by two numbers from one to five, allowing the representation of 25 characters using only 5 numeric symbols.

  4. Verbal arithmetic - Wikipedia

    en.wikipedia.org/wiki/Verbal_arithmetic

    From column 5, M = 1 since it is the only carry-over possible from the sum of two single digit numbers in column 4. Since there is a carry in column 5, O must be less than or equal to M (from column 4). But O cannot be equal to M, so O is less than M. Therefore O = 0.

  5. Hexspeak - Wikipedia

    en.wikipedia.org/wiki/Hexspeak

    Hexspeak is a novelty form of variant English spelling using the hexadecimal digits. Created by programmers as memorable magic numbers, hexspeak words can serve as a clear and unique identifier with which to mark memory or data.

  6. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.

  7. List of five-number lottery games - Wikipedia

    en.wikipedia.org/wiki/List_of_five-number...

    The lists do not include "4+1" games, such as Florida's Lucky Money, where all five numbers must be matched to win the top prize, but are drawn from two number fields(A similar game, Montana's "Big Sky Bonus", is actually a "four-number" game; the double matrix is 4/31 + 1/16(previously was 4/28 + 1/17). Matching all four "regular" numbers wins ...

  8. What's a six-digit verification code — and why you should ...

    www.aol.com/whats-six-digit-verification-code...

    Six-digit verification codes are a form of two-factor authentication, a process that helps keep your important online accounts secure. For example, you might get a text message or email with a six ...

  9. Mnemonic major system - Wikipedia

    en.wikipedia.org/wiki/Mnemonic_major_system

    Numzi - free web application for converting numbers to words/phrases and vice versa using the Major System. Covers the English language with over 220,000 words. Numzi also has an iOS app which is a portable Major System number-word converter. 2Know is free Windows software for converting numbers to words (English, German, French).