2887 accepted98% of judged
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2,887 accepted98% rate25.9 hours
In what year did Montenegro declare independence? Answer with the four-digit year only.
In what year did Concorde enter commercial service? Answer with the four-digit year only.
In which country is the city of Timbuktu? Answer with the country name only.
How many characters long is an IATA airline designator? Answer with the whole number only.
How many up quarks does a proton contain? Answer with the whole number only.
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.
What is the IATA code of Dubai International Airport? Answer with the three-letter code only.
The Sun is a red dwarf star. Answer true or false.
The Boeing 747 has three engines. Answer true or false.
What is the two-character IATA code of Norwegian Air Shuttle? Answer with the two-character code only.
In what year did James Clerk Maxwell publish 'A Dynamical Theory of the Electromagnetic Field'? Answer with the four-digit year only.
In what year did Isaac Newton publish Opticks? Answer with the four-digit year only.
What is the capital of Cuba? Answer with the English name of the city only.
Greenland is part of the Kingdom of Denmark. Answer true or false.
In which country is Machu Picchu? Answer with the country name only.
In what year did Isaac Newton die? Answer with the four-digit year only.
In what year was Etihad Airways founded? Answer with the four-digit year only.
Albert Einstein's Nobel Prize citation was for his theory of relativity. Answer true or false.
In what year did fragments of Comet Shoemaker-Levy 9 hit Jupiter? Answer with the four-digit year only.
How many US states border Mexico? Answer with the whole number only.
In what year did Hawaii become a US state? Answer with the four-digit year only.
How many countries share a land border with China? Answer with the whole number only.
How many spacetime dimensions does M-theory have? Answer with the whole number only.
In what year did Paul Dirac publish his relativistic equation for the electron? Answer with the four-digit year only.