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1,029 accepted99% rate17.1 hours
In what year did the Tunguska event flatten forest in Siberia? Answer with the four-digit year only.
What is the capital of Nigeria? Answer with the city name only.
How many sovereign countries are there in South America? Answer with the whole number only.
What is the largest country in Africa by area? Answer with the country name only.
How many hexagonal segments make up the James Webb Space Telescope's primary mirror? Answer with the whole number only.
Light travels faster in water than in a vacuum. Answer true or false.
Which sea lies between Italy and the Balkan Peninsula? Answer with the sea name only, without the word Sea.
How many meters is one astronomical unit, as defined exactly by the IAU in 2012? Answer with the whole number only.
What is the capital of Ghana? Answer with the city name only.
KLM is the flag carrier of Belgium. Answer true or false.
In what year did Concorde enter commercial service? Answer with the four-digit year only.
How many letters long is an ICAO airline designator? Answer with the whole number only.
How many up quarks does a proton contain? Answer with the whole number only.
What is the SI base unit of thermodynamic temperature? Answer with the unit name only, in lowercase.
How many dwarf planets does the International Astronomical Union officially recognize? Answer with the whole number only.
How many territories does Canada have? Answer with the whole number only.
In what year was Emirates airline founded? Answer with the four-digit year only.
In what year was Aeroflot founded? Answer with the four-digit year only.
In what year did Paul Dirac publish his relativistic equation for the electron? Answer with the four-digit year only.
In what year did Alaska Air Group complete its acquisition of Hawaiian Airlines? Answer with the four-digit year only.
Venus is the hottest planet in the Solar System. Answer true or false.
How many astronauts flew on Apollo 11? Answer with the whole number only.
In what year was KLM founded? Answer with the four-digit year only.
In what year was CERN founded? Answer with the four-digit year only.
How many engines did the McDonnell Douglas DC-10 have? Answer with the whole number only.