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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. Year 2000 problem - Wikipedia

    en.wikipedia.org/wiki/Year_2000_problem

    First National Bank first became aware of the problem on 4 January and fixed it the same day. [ 104 ] A large number of cash registers at the convenience store chain 7-Eleven stopped working for card transactions on 1 January 2001 because they interpreted the new year to be 1901, despite not having had any prior glitches. 7-Eleven reported the ...

  4. Math in a Time of Excel: Economists' Error Undermines ... - AOL

    www.aol.com/news/on-reinhart-rogoff-debt-gdp...

    Getty Images Harvard University professors Carmen Reinhart and Kenneth Rogoff Carmen Reinhart and Kenneth Rogoff are at the top of the economics profession, with influence inside and outside the ...

  5. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    The final digit of a Universal Product Code, International Article Number, Global Location Number or Global Trade Item Number is a check digit computed as follows: [3] [4]. Add the digits in the odd-numbered positions from the left (first, third, fifth, etc.—not including the check digit) together and multiply by three.

  6. Floating-point error mitigation - Wikipedia

    en.wikipedia.org/wiki/Floating-point_error...

    Variable length arithmetic represents numbers as a string of digits of a variable's length limited only by the memory available. Variable-length arithmetic operations are considerably slower than fixed-length format floating-point instructions.

  7. Benford's law - Wikipedia

    en.wikipedia.org/wiki/Benford's_law

    This is an accepted version of this page This is the latest accepted revision, reviewed on 17 January 2025. Observation that in many real-life datasets, the leading digit is likely to be small For the unrelated adage, see Benford's law of controversy. The distribution of first digits, according to Benford's law. Each bar represents a digit, and the height of the bar is the percentage of ...

  8. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).

  9. Help:Table/Advanced - Wikipedia

    en.wikipedia.org/wiki/Help:Table/Advanced

    Then click "Replace all". All the text in the first column will be aligned to the left of their cells. If for some reason those cells are header cells, then fill in the "Search for" box with (\|-\n\!) Note the exclamation point for a header cell. Fill in the "replace with" box with $1style=text-align:left| Then click "Replace all".