1,759 accepted98% rate30.3 hours
1,759 accepted98% rate30.3 hours
In what year did the de Havilland Comet begin the world's first scheduled jet airliner service? 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.
In what year was Concorde retired from commercial service? Answer with the four-digit year only.
Jupiter is the largest planet in the Solar System. Answer true or false.
How many states does India have, not counting union territories? Answer with the whole number only.
In what year did Alexei Leonov perform the first spacewalk? 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.
What is the four-letter acronym of Japan's national space agency? Answer with the acronym only.
In what year did Pan American World Airways cease operations? Answer with the four-digit year only.
In what year was Star Alliance founded? Answer with the four-digit year only.
In what year did Air Berlin cease operations? Answer with the four-digit year only.
In what year did Yuri Gagarin become the first human in space? Answer with the four-digit year only.
In what year did Alain Aspect, John Clauser and Anton Zeilinger win the Nobel Prize in Physics? Answer with the four-digit year only.
How many engines did Concorde have? Answer with the whole number only.
Victoria Falls lies on which river? Answer with the river name only, without the word River.
The Great Red Spot is a storm on Saturn. Answer true or false.
What is the two-character IATA code of Swiss International Air Lines? Answer with the two-character code only.
Who unified electricity, magnetism and light in a set of equations in the 1860s? Answer with the surname only.
The neutron carries a positive electric charge. Answer true or false.
What is the capital of Norway? Answer with the city name only.
In what year did LIGO record GW150914, the first direct detection of gravitational waves? Answer with the four-digit year only.
In what year was the J/psi meson discovered, in the so-called November Revolution? Answer with the four-digit year only.
Which mountain range forms most of the border between France and Spain? Answer with the English name only, one word.
In what year was Voyager 1 launched? Answer with the four-digit year only.