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  2. Seven-digit dialing - Wikipedia

    en.wikipedia.org/wiki/Seven-digit_dialing

    The system was based on fixed-length numbers; a direct-dial long-distance call consisted of a three-digit area code and a seven-digit local number. Numbers in 2L-4N cities (such as Montréal and Toronto ) were systematically lengthened to seven digits in the 1950s, a few exchanges at a time, so that all local numbers were seven digits when ...

  3. United States license plate designs and serial formats

    en.wikipedia.org/wiki/United_States_license...

    Formats for license plate numbers are consistent within the state. For example, Delaware is able to use six-digit all-numeric serials because of its low population. Several states, particularly those with higher populations, use seven-character formats of three letters and four digits, including 1ABC234 in California, 1234ABC in Kansas and ABC-1234 (with or without a space or dash) in Georgia ...

  4. Combination - Wikipedia

    en.wikipedia.org/wiki/Combination

    These combinations (subsets) are enumerated by the 1 digits of the set of base 2 numbers counting from 0 to 2 n − 1, where each digit position is an item from the set of n. Given 3 cards numbered 1 to 3, there are 8 distinct combinations , including the empty set:

  5. Wikipedia : List of all single-letter-single-digit combinations

    en.wikipedia.org/wiki/Wikipedia:List_of_all...

    The list of all single-letter-single-digit combinations contains 520 elements of the form [[{{letter}}{{digit}}]] and [[{{letter}}-{{digit}}]].. In general, any ...

  6. Wikipedia : List of all single-digit-single-letter combinations

    en.wikipedia.org/wiki/Wikipedia:List_of_all...

    The list of all single-digit-single-letter combinations contains 1040 different combinations of the form [[{{digit}}{{letter}}]] and [[{{digit}}-{{letter}}]]. In general, any abbreviation expansion page is located at the shorter link. Once the abbreviation page has been created, the hyphen link should {{R from abbreviation}} to the other page.

  7. Lottery mathematics - Wikipedia

    en.wikipedia.org/wiki/Lottery_mathematics

    The numerator equates to the number of ways to select the winning numbers multiplied by the number of ways to select the losing numbers. For a score of n (for example, if 3 choices match three of the 6 balls drawn, then n = 3), ( 6 n ) {\displaystyle {6 \choose n}} describes the odds of selecting n winning numbers from the 6 winning numbers.

  8. What are the most common Powerball numbers? New study ... - AOL

    www.aol.com/most-common-powerball-numbers-study...

    CSGO says players should avoid the notoriously unlucky number 13, which has been drawn only 51 times in 8 years. The bottom 10, unluckiest numbers with the fewest frequency are: 13. 49. 34. 29. 26 ...

  9. Numerical digit - Wikipedia

    en.wikipedia.org/wiki/Numerical_digit

    A numerical digit (often shortened to just digit) or numeral is a single symbol used alone (such as "1"), or in combinations (such as "15"), to represent numbers in positional notation, such as the common base 10. The name "digit" originates from the Latin digiti meaning fingers. [1]