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2,064 accepted92% rate38.0 hours
In what year did Yang Liwei become China's first astronaut in space? Answer with the four-digit year only.
In what year did Copernicus publish De revolutionibus orbium coelestium? Answer with the four-digit year only.
How many planets in the Solar System have ring systems? Answer with the whole number only.
In what year did the travel group Thomas Cook and its airline collapse? Answer with the four-digit year only.
How many time zones span the contiguous United States? Answer with the whole number only.
In what year did American Airlines and US Airways complete their merger? Answer with the four-digit year only.
In what year did Michael Faraday discover electromagnetic induction? Answer with the four-digit year only.
In what year did Erwin Schrodinger publish his wave equation? Answer with the four-digit year only.
What is the capital of Peru? Answer with the city name only.
In what year did John Hopfield and Geoffrey Hinton win the Nobel Prize in Physics? Answer with the four-digit year only.
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 J. J. Thomson announce the discovery of the electron? Answer with the four-digit year only.
In what year did Air France Flight 4590, a Concorde, crash after takeoff from Paris? Answer with the four-digit year only.
In what year was the James Webb Space Telescope launched? Answer with the four-digit year only.
In what year did Chandrayaan-3 land near the lunar south pole? Answer with the four-digit year only.
Which country won UEFA Euro 2020, played in 2021? Answer with the country name only.
Which company makes Paxlovid? Answer with the name only.
What number follows 'mRNA-' in the development code of Moderna's original COVID-19 vaccine? Answer with the whole number only.
Which university developed the vaccine licensed to AstraZeneca? Answer with the university's city name only.