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812 accepted96% rate9.0 hours
How many people have walked on the Moon? Answer with the whole number only.
How many engines did the Boeing 727 have? Answer with the whole number only.
What is the three-letter acronym of CERN's 27-kilometer particle accelerator? Answer with the acronym only.
How many regions does Italy have? Answer with the whole number only.
In what year did Emirates receive its first Airbus A380? Answer with the four-digit year only.
How many kilometers long is each arm of a LIGO interferometer? Answer with the whole number only.
What is the capital of Turkey? Answer with the city name only.
What is the capital of the US state of Illinois? Answer with the city name only.
Who founded Virgin Atlantic? Answer with the surname only.
In what year did Johannes Kepler publish Astronomia nova? Answer with the four-digit year only.
In which country is the ancient city of Petra? Answer with the country name only.
In what year did South Sudan become independent? Answer with the four-digit year only.
In what year did the Tenerife airport disaster, the deadliest accident in aviation history, occur? Answer with the four-digit year only.
What was the name of the Soviet and Russian space station that was deorbited in 2001? Answer with the name only.
How many Apollo missions landed astronauts on the Moon? Answer with the whole number only.
In what year did Alitalia stop flying and hand over to ITA Airways? Answer with the four-digit year only.
Who discovered the neutron in 1932? Answer with the surname only.
What is the capital of Afghanistan? Answer with the city name only.
At which cosmodrome in Kazakhstan did Gagarin's flight launch? Answer with the name only.
How many Nobel Prizes in Physics did John Bardeen win? Answer with the whole number only.
What is the capital of Vietnam? Answer with the city name only.
In what year was 51 Pegasi b, the first exoplanet found orbiting a Sun-like star, announced? Answer with the four-digit year only.
In what year did Alessandro Volta announce the voltaic pile, the first electric battery? Answer with the four-digit year only.
In what year did the Boeing 747 enter commercial service? Answer with the four-digit year only.
In what year is Halley's Comet next expected at perihelion? Answer with the four-digit year only.