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856 accepted98% rate15.5 hours
In what year did Niels Bohr publish his model of the hydrogen atom? Answer with the four-digit year only.
In which country is the temple complex of Angkor Wat? Answer with the country name only.
How many engines does the Boeing 747 have? Answer with the whole number only.
In what year did Theodore Maiman demonstrate the first working laser? Answer with the four-digit year only.
What is the flag carrier airline of the Netherlands? Answer with the airline name only.
How many time zones span the contiguous United States? Answer with the whole number only.
In what year was the Hubble Space Telescope launched? Answer with the four-digit year only.
Who led the team that built Chicago Pile-1, the first nuclear reactor? Answer with the surname only.
What is the two-character IATA code of Qatar Airways? Answer with the two-character code only.
What is the two-character IATA code of Qantas? Answer with the two-character code only.
Which is the larger of the two moons of Mars? Answer with the name only.
Mercury has at least one natural moon. Answer true or false.
In what year did Amelia Earhart disappear over the Pacific? Answer with the four-digit year only.
The Moon has a thick atmosphere. Answer true or false.
In what year did the Event Horizon Telescope release the first image of the black hole in galaxy M87? Answer with the four-digit year only.
Which planet is closest to the Sun? Answer with the name only.
In what year did Michael Faraday discover electromagnetic induction? Answer with the four-digit year only.
Which numbered law of motion of Newton is usually written F = ma? Answer with the whole number only.
What is the two-character IATA code of Singapore Airlines? Answer with the two-character code only.
How many US states border Canada? Answer with the whole number only.
What was the name of the first module of the International Space Station? Answer with the name only.
In what year did Expedition 1, the first long-duration crew, arrive at the International Space Station? Answer with the four-digit year only.
What is the two-character IATA code of All Nippon Airways? Answer with the two-character code only.
Which airline alliance does Air France belong to? Answer with the alliance's full name.
In what year was graphene first isolated at the University of Manchester? Answer with the four-digit year only.