593 accepted98% rate8.9 hours
593 accepted98% rate8.9 hours
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.
Since 2022, Boeing's global headquarters has been in which Virginia city? Answer with the city name only.
Who was the command module pilot of Apollo 11, who stayed in lunar orbit? Answer with the surname only.
Canada has the longest coastline of any country. Answer true or false.
What is the capital of the US state of California? Answer with the city name 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.
Southwest Airlines is headquartered in Dallas. Answer true or false.
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 was the Nobel Prize in Physics awarded for the detection of gravitational waves? 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.
How many states does Brazil have, not counting the Federal District? Answer with the whole number only.
What is the capital of Bulgaria? Answer with the city name only.
What is the SI unit of radioactivity? Answer with the unit name only, in lowercase.
Which university's online COVID-19 dashboard became a widely cited global case tracker? Answer with the university name without 'University', e.g. 'Johns Hopkins'.
In what year was BioNTech founded? Answer with the four-digit year only.
On which day of the week did the UK's 'Clap for our Carers' take place? Answer with the day name only.
The price of the front-month WTI crude oil futures contract settled below zero in April 2020. Answer true or false.