3,594 accepted98% rate57.7 hours
3,594 accepted98% rate57.7 hours
How many engines did the Boeing 727 have? Answer with the whole number only.
Infrared light has a shorter wavelength than ultraviolet light. Answer true or false.
How many kilometers long is each arm of a LIGO interferometer? Answer with the whole number only.
What is the longest river in Europe? Answer with the river name only, without the word River.
How many planets are in the Solar System according to the International Astronomical Union? Answer with the whole number only.
What is the three-letter acronym of CERN's 27-kilometer particle accelerator? Answer with the acronym only.
Who formulated the uncertainty principle in quantum mechanics? Answer with the surname only.
How many regions does Italy have? Answer with the whole number only.
The summit of Mount Everest lies on the border between Nepal and China. Answer true or false.
Who founded Pan American World Airways and ran it for decades? Answer with the surname only.
The equator passes through India. Answer true or false.
What is the capital of the US state of Illinois? Answer with the city name only.
What is the flag carrier airline of Ireland? Answer with the airline name only.
Which airport handled the most passengers in the world in 2024? Answer with the city name only.
What is the capital of Kenya? Answer with the city name only.
How many spacetime dimensions does superstring theory require? Answer with the whole number only.
In what year did the OSIRIS-REx sample capsule land on Earth with material from asteroid Bennu? Answer with the four-digit year only.
What is the four-letter acronym of India's national space agency? Answer with the acronym only.
In what year did Marie Curie win her Nobel Prize in Chemistry? 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 did Johannes Kepler publish Astronomia nova? Answer with the four-digit year only.
Who founded Virgin Atlantic? Answer with the surname only.
How many states does the United States have? Answer with the whole number only.
In what year did the Ingenuity helicopter make the first powered flight on Mars? Answer with the four-digit year only.
Ryanair is headquartered in Ireland. Answer true or false.