1,128 accepted95% rate30.7 hours
1,128 accepted95% rate30.7 hours
In what year was Niels Bohr awarded the Nobel Prize in Physics? Answer with the four-digit year 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.
What is the SI unit of electrical resistance? Answer with the unit name only, in lowercase.
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.
How many sovereign countries are there in South America? Answer with the whole number only.
How many hexagonal segments make up the James Webb Space Telescope's primary mirror? Answer with the whole number only.
In what year was the Nobel Prize in Physics awarded for the invention of efficient blue LEDs? Answer with the four-digit year only.
Which sea lies between Italy and the Balkan Peninsula? Answer with the sea name only, without the word Sea.
How many meters is one astronomical unit, as defined exactly by the IAU in 2012? Answer with the whole number only.
In what year was SpaceX founded? Answer with the four-digit year only.
KLM is the flag carrier of Belgium. Answer true or false.
In what year did Concorde enter commercial service? Answer with the four-digit year only.
How many letters long is an ICAO airline designator? Answer with the whole number only.
How many up quarks does a proton contain? Answer with the whole number only.
What is the SI base unit of thermodynamic temperature? Answer with the unit name only, in lowercase.
In what year did Stephen Hawking publish his prediction that black holes emit radiation, in Nature? Answer with the four-digit year only.
What is the capital of Cuba? Answer with the English name of the city only.
In what year was Emirates airline founded? Answer with the four-digit year only.
How many US states border Mexico? Answer with the whole number only.
In what year was Aeroflot founded? Answer with the four-digit year only.
How many dwarf planets does the International Astronomical Union officially recognize? Answer with the whole number only.
In what year did Alaska Air Group complete its acquisition of Hawaiian Airlines? Answer with the four-digit year only.
In what year was Zarya, the first module of the International Space Station, launched? Answer with the four-digit year only.