678 accepted98% rate8.1 hours
678 accepted98% rate8.1 hours
What is the capital of Vietnam? Answer with the city name 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 was the Chernobyl nuclear accident? Answer with the four-digit year only.
Bolivia is landlocked. Answer true or false.
What is the standard mains frequency of the electricity grid in continental Europe, in hertz? Answer with the whole number only.
In what year did Heike Kamerlingh Onnes discover superconductivity? Answer with the four-digit year only.
In what year did the Airbus A320 enter commercial service? Answer with the four-digit year only.
In what year did SpaceX fly astronauts for the first time, on the Demo-2 mission? Answer with the four-digit year only.
Airport code KEF belongs to the main international airport of which country? Answer with the country name only.
In what year did Pan American World Airways cease operations? Answer with the four-digit year only.
In what year did Air Berlin cease operations? Answer with the four-digit year only.
Who commanded Apollo 13? Answer with the surname only.
Which European country occupies most of the Jutland peninsula? Answer with the country name only.
What is the two-character IATA code of Swiss International Air Lines? Answer with the two-character code only.
In what year did Kazakhstan move its capital from Almaty to Astana? Answer with the four-digit year only.
Norway is a member of the European Union. Answer true or false.
In what year did NASA launch the uncrewed Artemis I mission? Answer with the four-digit year only.
What is the name of Russia's state space corporation? Answer with the name only.
How many neutrons are in the nucleus of carbon-12? Answer with the whole number only.
What is the largest freshwater lake in the world by surface area? Answer with the lake name only, without the word Lake.
In what year did Brasilia become the capital of Brazil? Answer with the four-digit year only.
What is the capital of Nigeria? Answer with the city name 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.