1,531 accepted98% rate23.1 hours
1,531 accepted98% rate23.1 hours
How many US states border Mexico? Answer with the whole number only.
In what year did fragments of Comet Shoemaker-Levy 9 hit Jupiter? Answer with the four-digit year only.
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.
In what year did the Chelyabinsk meteor explode over Russia? 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 was Zarya, the first module of the International Space Station, launched? 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.
In what year was Tata Airlines, which became Air India, founded? 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.
How many flavors of lepton are there in the Standard Model? 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 which country is the temple complex of Angkor Wat? Answer with the country name only.
In what year did Clyde Tombaugh discover Pluto? Answer with the four-digit year only.
Which US airline did Herb Kelleher co-found? Answer with the one-word name only, without the word Airlines.
What is the flag carrier airline of the Netherlands? Answer with the airline name 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.
The Celsius and Fahrenheit scales show the same reading at minus how many degrees? Answer with the number without the minus sign.
In what year did Albert Einstein die? Answer with the four-digit year only.
How many planets in the Solar System have ring systems? Answer with the whole number only.
How many time zones span the contiguous United States? Answer with the whole number only.
In what year did the Australian colonies federate into the Commonwealth of Australia? Answer with the four-digit year only.