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  2. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    In other words, the square of a number is the square of its difference from 100 added to the product of one hundred and the difference of one hundred and the product of two and the difference of one hundred and the number. For example, to square 93: 100(100 − 2(7)) + 7 2 = 100 × 86 + 49 = 8,600 + 49 = 8,649

  3. Nasdaq - Wikipedia

    en.wikipedia.org/wiki/Nasdaq

    The Nasdaq Stock Market (/ ˈ n æ z d æ k / ⓘ; National Association of Securities Dealers Automated Quotations) is an American stock exchange based in New York City.It is the most active stock trading venue in the U.S. by volume, [3] and ranked second on the list of stock exchanges by market capitalization of shares traded, behind the New York Stock Exchange. [4]

  4. Polynesian navigation - Wikipedia

    en.wikipedia.org/wiki/Polynesian_navigation

    Polynesian navigation relies heavily on constant observation and memorization. Navigators have to memorize where they have sailed from in order to know where they are. The sun was the main guide for navigators because they could follow its exact points as it rose and set. Once the sun had set they would use the rising and setting points of the ...

  5. Artificial intelligence - Wikipedia

    en.wikipedia.org/wiki/Artificial_intelligence

    Artificial intelligence (AI), in its broadest sense, is intelligence exhibited by machines, particularly computer systems.It is a field of research in computer science that develops and studies methods and software that enable machines to perceive their environment and use learning and intelligence to take actions that maximize their chances of achieving defined goals. [1]

  6. Linear regression - Wikipedia

    en.wikipedia.org/wiki/Linear_regression

    In order to check this assumption, a plot of residuals versus predicted values (or the values of each individual predictor) can be examined for a "fanning effect" (i.e., increasing or decreasing vertical spread as one moves left to right on the plot).

  7. 600-cell - Wikipedia

    en.wikipedia.org/wiki/600-cell

    The 600-cell is the fifth in the sequence of 6 convex regular 4-polytopes (in order of complexity and size at the same radius). [a] It can be deconstructed into twenty-five overlapping instances of its immediate predecessor the 24-cell, [5] as the 24-cell can be deconstructed into three overlapping instances of its predecessor the tesseract (8-cell), and the 8-cell can be deconstructed into ...

  8. Esperanto phonology - Wikipedia

    en.wikipedia.org/wiki/Esperanto_phonology

    The uncommon affricate /d͜z/ does not have a distinct letter in the orthography, but is written with the digraph dz , as in edzo ('husband'). Not everyone agrees with Kalocsay & Waringhien that edzo and peco are a near rhyme, differing only in voicing, or on the status of /d͡z/ as a phoneme; Wennergren considers it to be a simple sequence of /d/ + /z/. [4]