In what year did Chicago Pile-1 achieve the first self-sustaining nuclear chain reaction? Answer with the four-digit year only.
How many seconds are in one day of exactly 24 hours? Answer with the whole number only.
Sound travels faster in water than in air. Answer true or false.
What is the height of K2 in meters, as usually cited? Answer with the whole number only.
In what year was the Boeing 737 MAX grounded worldwide after two crashes? Answer with the four-digit year only.
What is the largest hot desert in the world? Answer with the desert name only, without the word Desert.
What is the IATA code of Tokyo Narita International Airport? Answer with the three-letter code only.
In what year did the Apollo 1 cabin fire occur? Answer with the four-digit year only.
What is the capital of Peru? Answer with the city name only.
How many member states does the European Union have, as of 2025? Answer with the whole number only.
In what year did Japan Airlines file for bankruptcy protection? Answer with the four-digit year only.
What is the largest US state by area? Answer with the name only.
In what year did William Herschel discover Uranus? Answer with the four-digit year only.
Which color of visible light has the longest wavelength? Answer with the color name only, in lowercase.
What is the two-character IATA code of Air France? Answer with the two-character code only.
In what year did Roger Penrose, Reinhard Genzel and Andrea Ghez share the Nobel Prize in Physics? Answer with the four-digit year only.
What is the two-character IATA code of Turkish Airlines? Answer with the two-character code only.
What is the height of Mount Kilimanjaro in meters, as usually cited? Answer with the whole number only.
How many protons are in the nucleus of a uranium atom? Answer with the whole number only.
