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  2. Grading systems by country - Wikipedia

    en.wikipedia.org/wiki/Grading_systems_by_country

    The maximum total primary grade varies by subject so that one might obtain a primary grade of 23 out of 37 in mathematics and a primary grade of 43 out of 80 in French. The primary grades are then converted into final or "test grades" by means of a sophisticated statistical calculation, which takes into account the distribution of primary ...

  3. Pittsburgh - Wikipedia

    en.wikipedia.org/wiki/Pittsburgh

    The city ranked 26th for short-term particle pollution, earning an F grade, and 19th for year-round particle pollution. It received a D grade for ozone pollution, ranking 50th for ozone smog. [ 81 ] [ 82 ] However, United States Environmental Protection Agency (EPA) data from 2021 to 2024 shows that Pittsburgh's air quality was generally good ...

  4. Derrick Henry - Wikipedia

    en.wikipedia.org/wiki/Derrick_Henry

    Derrick Lamar Henry Jr. [1] [2] (born January 4, 1994) [1] is an American professional football running back for the Baltimore Ravens of the National Football League (NFL). ). Nicknamed "King Henry", [3] [4] he is known for his imposing style of play and larger build than the average run

  5. Richard Feynman - Wikipedia

    en.wikipedia.org/wiki/Richard_Feynman

    Richard Phillips Feynman (/ ˈ f aɪ n m ə n /; May 11, 1918 – February 15, 1988) was an American theoretical physicist.He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for which he proposed the parton model.

  6. Greek language - Wikipedia

    en.wikipedia.org/wiki/Greek_language

    Greek has been spoken in the Balkan peninsula since around the 3rd millennium BC, [18] or possibly earlier. [19] The earliest written evidence is a Linear B clay tablet found in Messenia that dates to between 1450 and 1350 BC, [20] making Greek the world's oldest recorded living language. [21]