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  2. Numerical digit - Wikipedia

    en.wikipedia.org/wiki/Numerical_digit

    For any numeral system with an integer base, the number of different digits required is the absolute value of the base. For example, decimal (base 10) requires ten digits (0 to 9), and binary (base 2) requires only two digits (0 and 1).

  3. Social Security number - Wikipedia

    en.wikipedia.org/wiki/Social_Security_number

    The Tax Reform Act of 1986 required parents to list Social Security numbers for each dependent over the age of 5 for whom the parent wanted to claim a tax deduction. [9] Before this act, parents claiming tax deductions were simply trusted not to lie about the number of children they supported.

  4. List of national identity card policies by country - Wikipedia

    en.wikipedia.org/wiki/List_of_national_identity...

    The first two digits of the number are your year of birth (e.g., 88xxxxxxxx for someone born in 1988). The final letter is generally a V or X. An NIC number is required to apply for a passport (over 16), driving license (over 18) and to vote (over 18).

  5. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    As 100=10 2, these are two decimal digits. 121: Number expressible with two undecimal digits. 125: Number expressible with three quinary digits. 128: Using as 128=2 7. [clarification needed] 144: Number expressible with two duodecimal digits. 169: Number expressible with two tridecimal digits. 185

  6. Mathematics of Sudoku - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_Sudoku

    Many Sudokus have been found with 17 clues, although finding them is not a trivial task. [ 2 ] [ 3 ] A 2014 paper by Gary McGuire, Bastian Tugemann, and Gilles Civario proved that the minimum number of clues in any proper Sudoku is 17 through an exhaustive computer search based on hitting set enumeration .

  7. Where is the account number on a check? - AOL

    www.aol.com/finance/where-account-number-check...

    Routing numbers are required for many types of financial transactions, including check processing and wire transfers. Like the account number, the routing number can be found at the bottom of a check.

  8. ZIP Code - Wikipedia

    en.wikipedia.org/wiki/ZIP_Code

    The add-on code is often one of the following: the last four digits of the box number (e.g. PO Box 107050, Albany, NY 12201-7050), zero plus the last three digits of the box number (e.g., PO Box 17727, Eagle River, AK 99577-0727), or, if the box number consists of fewer than four digits, enough zeros are attached to the front of the box number ...

  9. Tips to create a strong password - AOL Help

    help.aol.com/articles/tips-to-create-a-strong...

    A strong password is your first line of defense against intruders and imposters. Here are some helpful tips on creating a secure password so you can make sure your information remains safe.