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  2. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  3. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    The Luhn algorithm or Luhn formula, also known as the "modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers.

  4. Microsoft Office password protection - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Office_password...

    As the file format is a group of XML files within a ZIP; unzipping, editing, and replacing the workbook.xml file (and/or the individual worksheet XML files) with identical copies in which the unknown key and salt are replaced with a known pair or removed altogether allows the sheets to be edited. [citation needed]

  5. This is why you should never call back an unknown number - AOL

    www.aol.com/article/lifestyle/2019/05/03/this-is...

    Find the official number online and dial that, suggests Levin. “Never trust—always verify,” he says. Watch out for these other phone call scams that could steal your money .

  6. Anomaly detection - Wikipedia

    en.wikipedia.org/wiki/Anomaly_detection

    It helps in identifying system failures and security breaches in complex networks of IoT devices. [18] The methods must manage real-time data, diverse device types, and scale effectively. Garbe et al. [ 19 ] have introduced a multi-stage anomaly detection framework that improves upon traditional methods by incorporating spatial clustering ...

  7. Cramer's rule - Wikipedia

    en.wikipedia.org/wiki/Cramer's_rule

    In linear algebra, Cramer's rule is an explicit formula for the solution of a system of linear equations with as many equations as unknowns, valid whenever the system has a unique solution. It expresses the solution in terms of the determinants of the (square) coefficient matrix and of matrices obtained from it by replacing one column by the ...

  8. Data and information visualization - Wikipedia

    en.wikipedia.org/wiki/Data_and_information...

    Used to spot trends and make sense of data. This type of visual is more common with large and complex data where the dataset is somewhat unknown and the task is open-ended. everyday data-visualisation (data-driven & declarative). [61] The most common and simple type of visualisation used for affirming and setting context.

  9. Data analysis - Wikipedia

    en.wikipedia.org/wiki/Data_analysis

    Mathematical formulas or models (also known as algorithms), may be applied to the data in order to identify relationships among the variables; for example, using correlation or causation.

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