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  2. Irreducible fraction - Wikipedia

    en.wikipedia.org/wiki/Irreducible_fraction

    Download as PDF; Printable version; In other projects ... (or fraction in lowest terms, simplest form or reduced ... of 90 and 120, which is 30. As 120 ÷ 30 = 4, and ...

  3. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    A more modern form of slide rule was created in 1859 by French artillery lieutenant Amédée Mannheim, who was fortunate both in having his rule made by a firm of national reputation, and its adoption by the French Artillery. Mannheim's rule had two major modifications that made it easier to use than previous general-purpose slide rules.

  4. Shannon number - Wikipedia

    en.wikipedia.org/wiki/Shannon_number

    Claude Shannon. The Shannon number, named after the American mathematician Claude Shannon, is a conservative lower bound of the game-tree complexity of chess of 10 120, based on an average of about 10 3 possibilities for a pair of moves consisting of a move for White followed by a move for Black, and a typical game lasting about 40 such pairs of moves.

  5. Ratio - Wikipedia

    en.wikipedia.org/wiki/Ratio

    The verbal equivalent is "40 is to 60 as 2 is to 3." A ratio that has integers for both quantities and that cannot be reduced any further (using integers) is said to be in simplest form or lowest terms. Sometimes it is useful to write a ratio in the form 1:x or x:1, where x is not necessarily an integer, to enable comparisons of different ...

  6. Engineering notation - Wikipedia

    en.wikipedia.org/wiki/Engineering_notation

    Engineering notation or engineering form (also technical notation) is a version of scientific notation in which the exponent of ten is always selected to be divisible by three to match the common metric prefixes, i.e. scientific notation that aligns with powers of a thousand, for example, 531×10 3 instead of 5.31×10 5 (but on calculator displays written without the ×10 to save space).

  7. File:LD 40.pdf - Wikipedia

    en.wikipedia.org/wiki/File:LD_40.pdf

    Original file (1,275 × 1,650 pixels, file size: 1.8 MB, MIME type: application/pdf) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  8. File:CRAWFORD MS PG 120-face-en us.pdf - Wikipedia

    en.wikipedia.org/wiki/File:CRAWFORD_MS_PG_120...

    Original file (1,275 × 1,768 pixels, file size: 205 KB, MIME type: application/pdf, 2 pages) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  9. 120 (number) - Wikipedia

    en.wikipedia.org/wiki/120_(number)

    120 (one hundred [and] twenty) is the natural number following 119 and preceding 121. In the Germanic languages , the number 120 was also formerly known as "one hundred". This "hundred" of six score is now obsolete but is described as the long hundred or great hundred in historical contexts.