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805 accepted99% rate16.3 hours
How many engines did the Boeing 727 have? Answer with the whole number only.
The summit of Mount Everest lies on the border between Nepal and China. Answer true or false.
Infrared light has a shorter wavelength than ultraviolet light. Answer true or false.
How many regions does Italy have? Answer with the whole number only.
How many spacetime dimensions does superstring theory require? Answer with the whole number only.
What is the four-letter acronym of India's national space agency? Answer with the acronym only.
Who founded Virgin Atlantic? Answer with the surname only.
In what year was the Kepler space telescope launched? Answer with the four-digit year only.
In what year did the Ingenuity helicopter make the first powered flight on Mars? Answer with the four-digit year only.
In what year did Johannes Kepler publish Astronomia nova? Answer with the four-digit year only.
In which country is the ancient city of Petra? Answer with the country name only.
In what year was Qantas founded? Answer with the four-digit year only.
In what year did Viking 1 land on Mars? Answer with the four-digit year only.
What is the capital of Iran? Answer with the city name only.
In what year was Cathay Pacific founded? Answer with the four-digit year only.
Who discovered the neutron in 1932? Answer with the surname only.
What is the capital of Afghanistan? Answer with the city name only.
In which country is Angel Falls, the world's highest uninterrupted waterfall? Answer with the country name only.
In what year did the Tata Group take back control of Air India from the government? Answer with the four-digit year only.
In what year was 51 Pegasi b, the first exoplanet found orbiting a Sun-like star, announced? Answer with the four-digit year only.
In what year was the Chernobyl nuclear accident? Answer with the four-digit year only.
In what year is Halley's Comet next expected at perihelion? Answer with the four-digit year only.
Delta Air Lines is a member of the oneworld alliance. Answer true or false.
What is the standard mains frequency of the electricity grid in continental Europe, in hertz? Answer with the whole number only.
What is the IATA code of Hartsfield-Jackson Atlanta International Airport? Answer with the three-letter code only.