1,829 accepted98% rate30.4 hours
1,829 accepted98% rate30.4 hours
What is the exact defined speed of light in vacuum, in meters per second? Answer with the whole number only.
How many flavors of lepton are there in the Standard Model? Answer with the whole number only.
In what year did the Chelyabinsk meteor explode over Russia? Answer with the four-digit year only.
What is the IATA code of Paris Charles de Gaulle Airport? Answer with the three-letter code only.
In what year was Tata Airlines, which became Air India, founded? Answer with the four-digit year only.
How many countries share a land border with China? Answer with the whole number only.
How many engines did the McDonnell Douglas DC-10 have? Answer with the whole number only.
What is the two-character IATA code of Etihad Airways? Answer with the two-character code only.
How many provinces does Canada have? Answer with the whole number only.
Which US airline did Herb Kelleher co-found? Answer with the one-word name only, without the word Airlines.
How many states does Australia have, not counting its territories? Answer with the whole number only.
In what year did the United States purchase Alaska from Russia? Answer with the four-digit year only.
Whose constant, symbol h, relates a photon's energy to its frequency? Answer with the surname only.
Which dwarf planet is the largest object in the asteroid belt? Answer with the name only.
In what year did Albert Einstein die? Answer with the four-digit year only.
How many time zones span the contiguous United States? Answer with the whole number only.
How many planets in the Solar System have ring systems? Answer with the whole number only.
What is the highest mountain in North America? Answer with its official name only, one word.
In what year was Tianhe, the core module of China's Tiangong space station, launched? Answer with the four-digit year only.
What is the capital of Morocco? Answer with the city name only.
What is the two-character IATA code of Qatar Airways? Answer with the two-character code only.
What is the two-character IATA code of China Eastern Airlines? Answer with the two-character code only.
Which particle carries the electromagnetic force? Answer with the particle name only, in lowercase.
How many cantons does Switzerland have? Answer with the whole number only.
Australia is both a country and a continent. Answer true or false.