How many countries share a land border with China? Answer with the whole number only.
How many spacetime dimensions does M-theory have? Answer with the whole number only.
In what year did Paul Dirac publish his relativistic equation for the electron? Answer with the four-digit year only.
What is the exact defined speed of light in vacuum, in meters per second? 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.
What is the largest country in the world by area? Answer with the country name only.
In what year did the Chelyabinsk meteor explode over Russia? Answer with the four-digit year only.
What is the two-character IATA code of KLM? Answer with the two-character code only.
What is the capital of Pakistan? Answer with the city name only.
How many flavors of lepton are there in the Standard Model? Answer with the whole number 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 engines did the McDonnell Douglas DC-10 have? Answer with the whole number only.
In what year did Niels Bohr publish his model of the hydrogen atom? Answer with the four-digit year only.
In what year did Clyde Tombaugh discover Pluto? Answer with the four-digit year only.
In which country is the temple complex of Angkor Wat? Answer with the country name 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 Apollo 13 suffer its oxygen tank explosion? Answer with the four-digit year only.
