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  2. Mathematical Olympiads for Elementary and Middle Schools

    en.wikipedia.org/wiki/Mathematical_Olympiads_for...

    [1] Two dozen other nations also participate in the competition. There are two divisions, Elementary and Middle School. Elementary level problems are for grades 4-6 and Middle School level problems are for grades 7-8, though 4-6 graders may participate in Middle School problems. Hundreds of thousands of students participate annually in MOEMS ...

  3. Speed - Wikipedia

    en.wikipedia.org/wiki/Speed

    In kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a non-negative scalar quantity. [1] The average speed of an object in an interval of time is the distance travelled by the object divided by the ...

  4. Speedcubing - Wikipedia

    en.wikipedia.org/wiki/Speedcubing

    Additionally, specialized formats such as 3×3, 4×4, and 5×5 blindfolded, 3×3 one-handed (OH), 3×3 Fewest Moves, and 3×3 multi-blind are also regulated and hosted in competitions. [ 1 ] As of February 2025, the world record for the fastest single solve of a Rubik's cube in a competitive setting stands at 3.13 seconds.

  5. Middle-distance running - Wikipedia

    en.wikipedia.org/wiki/Middle-distance_running

    The standard middle distances are the 800 metres, 1500 metres and mile run, although the 3000 metres may also be classified as a middle-distance event. [1] The 1500 m came about as a result of running 3 + 3 ⁄ 4 laps of a 400 m outdoor track or 7 + 1 ⁄ 2 laps of a 200 m indoor track, [2] which were commonplace in continental Europe in the ...

  6. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    This list has achieved great celebrity among mathematicians, [224] and at least thirteen of the problems (depending how some are interpreted) have been solved. [223] A new list of seven important problems, titled the "Millennium Prize Problems", was published in 2000. Only one of them, the Riemann hypothesis, duplicates one of Hilbert's problems.

  7. List of vehicle speed records - Wikipedia

    en.wikipedia.org/wiki/List_of_vehicle_speed_records

    Land speed records by surface Category Speed (km/h) Speed (mph) Vehicle Operator Date Certifier Refs On ice: 335.7: 208.6: Audi RS 6: Janne Laitinen 9 Mar 2013 FIA [19] On the Moon: 18.0: 11.2: Apollo 17 Lunar Roving Vehicle (LRV‑003) Eugene Cernan: 11 Dec 1972 (unofficial) [20] On Mars: 0.18: 0.11: Mars Exploration Rovers Spirit and Opportunity

  8. British land speed record - Wikipedia

    en.wikipedia.org/wiki/British_land_speed_record

    On 7 July 2006, Colin Fallows raised this 300.3 mph average speed again by 1 mph with an each-way average of 301 mph at RAF Fairford in Vampire. His peak speed was 331 mph. At the same event at RAF Fairford on 7 July 2006, Mark Newby drove his jet car Split Second to an MSA/FIA accredited average speed of 338.74 mph with a peak of 362 mph, the ...

  9. List of NP-complete problems - Wikipedia

    en.wikipedia.org/wiki/List_of_NP-complete_problems

    Route inspection problem (also called Chinese postman problem) for mixed graphs (having both directed and undirected edges). The program is solvable in polynomial time if the graph has all undirected or all directed edges. Variants include the rural postman problem. [3]: ND25, ND27 Clique cover problem [2] [3]: GT17 Clique problem [2] [3]: GT19

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