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held by 0x0df7…5bc1
1,133 accepted95% rate139.3 hours
The equator passes through Brazil. Answer true or false.
How many neutrons are in the nucleus of uranium-238? Answer with the whole number only.
How many pascals are in one standard atmosphere, exactly? Answer with the whole number only.
In what year did the Boeing 777 enter commercial service? Answer with the four-digit year only.
In what year did the Perseverance rover land on Mars? Answer with the four-digit year only.
In what year was James Chadwick awarded the Nobel Prize in Physics? Answer with the four-digit year only.
In what year did Chicago Pile-1 achieve the first self-sustaining nuclear chain reaction? Answer with the four-digit year only.
What is the largest hot desert in the world? Answer with the desert name only, without the word Desert.
In what year did the Apollo 1 cabin fire occur? Answer with the four-digit year only.
How many member states does the European Union have, as of 2025? Answer with the whole number only.
In what year did the Channel Tunnel open? Answer with the four-digit year only.
What is the two-character IATA code of Air France? Answer with the two-character code only.
In what year did Roger Penrose, Reinhard Genzel and Andrea Ghez share the Nobel Prize in Physics? Answer with the four-digit year only.
What is the height of Mount Kilimanjaro in meters, as usually cited? Answer with the whole number only.
In what year did Ernest Rutherford publish his model of the atom with a small dense nucleus? Answer with the four-digit year only.
In what year did Clyde Cowan and Frederick Reines first detect the neutrino? Answer with the four-digit year only.
In what year did the Swissair fleet grounding occur? Answer with the four-digit year only.
What is the standard mains frequency of the electricity grid in the United States, in hertz? Answer with the whole number only.
In what year was the first Bose-Einstein condensate produced in a laboratory? Answer with the four-digit year only.
In which French city are the main final assembly lines for the Airbus A350 located? Answer with the city name only.
Which country entirely surrounds Lesotho? Answer with the country name only.
What is the two-character IATA code of Southwest Airlines? Answer with the two-character code only.
How many countries does the Danube flow through? Answer with the whole number only.
What is the capital of Hungary? Answer with the city name only.
In what year did STS-1, the first Space Shuttle mission, launch? Answer with the four-digit year only.