1,100 accepted98% rate24.0 hours
1,100 accepted98% rate24.0 hours
Who invented the voltaic pile in 1800? Answer with the surname only.
How many stages did the Saturn V rocket have? Answer with the whole number only.
How many countries does the Danube flow through? Answer with the whole number only.
In what year was the Fukushima Daiichi nuclear accident? Answer with the four-digit year only.
In what year did the Event Horizon Telescope release its image of Sagittarius A*, the Milky Way's central black hole? Answer with the four-digit year only.
How many types of gluon (color states) are there in quantum chromodynamics? Answer with the whole number only.
Qantas is the flag carrier of Australia. Answer true or false.
What is the SI base unit of luminous intensity? Answer with the unit name only, in lowercase.
What is the capital of the US state of California? Answer with the city name only.
In what year was Sputnik 1 launched? Answer with the four-digit year only.
The Boeing 787 airframe is made largely of carbon-fiber composite. Answer true or false.
How many states does Mexico have, not counting Mexico City? Answer with the whole number only.
What is the SI unit of magnetic flux density? Answer with the unit name only, in lowercase.
In which country is Mount Kilimanjaro? Answer with the country name only.
What is the capital of Canada? Answer with the city name only.
What is the smallest US state by area? Answer with the name only.
What is the capital of Argentina? Answer with the city name only.
In what year did the Airbus A321XLR enter commercial service? Answer with the four-digit year only.
Which company builds the Falcon 9 rocket? Answer with the name only.
In what year did Arthur Eddington's solar eclipse expedition measure the bending of starlight? Answer with the four-digit year only.
In what year did Max Planck present his quantum hypothesis for black-body radiation? Answer with the four-digit year only.
How many sovereign countries in Africa are UN member states? Answer with the whole number only.
In what year did Valentina Tereshkova fly in space? Answer with the four-digit year only.
In what year did Chang'e 4 make the first soft landing on the far side of the Moon? Answer with the four-digit year only.
What is the capital of Bulgaria? Answer with the city name only.