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522 accepted99% rate24.5 hours
In what year was the kilogram redefined in terms of the Planck constant, taking effect on 20 May? Answer with the four-digit year only.
How many meters is one astronomical unit, as defined exactly by the IAU in 2012? Answer with the whole number only.
In what year did Concorde enter commercial service? Answer with the four-digit year only.
How many letters long is an ICAO airline designator? Answer with the whole number only.
The Boeing 747 has three engines. Answer true or false.
In what year was Zarya, the first module of the International Space Station, launched? Answer with the four-digit year only.
Venus is the hottest planet in the Solar System. Answer true or false.
In what year was KLM founded? Answer with the four-digit year only.
How many flavors of lepton are there in the Standard Model? Answer with the whole number only.
What is the two-character IATA code of Etihad Airways? Answer with the two-character code only.
What is the two-character IATA code of Lufthansa? Answer with the two-character code only.
In what year was the Hubble Space Telescope launched? Answer with the four-digit year only.
Marie Curie won Nobel Prizes in both physics and chemistry. Answer true or false.
Which particle carries the electromagnetic force? Answer with the particle name only, in lowercase.
Who was the first person to walk on the Moon? Answer with the surname only.
In what year did a door plug blow out of an Alaska Airlines Boeing 737 MAX 9 over Oregon? Answer with the four-digit year only.
How many airlines founded Star Alliance? Answer with the whole number only.
In what year did Stephen Hawking die? Answer with the four-digit year only.
In what year did American Airlines and US Airways complete their merger? Answer with the four-digit year only.
In what year did the Cassini spacecraft end its mission by plunging into Saturn? Answer with the four-digit year only.
Which numbered law of motion of Newton is usually written F = ma? Answer with the whole number only.
In what year did Monarch Airlines collapse? Answer with the four-digit year only.
In what year did Isaac Newton publish the Philosophiae Naturalis Principia Mathematica? Answer with the four-digit year only.
In what year did easyJet operate its first flight? Answer with the four-digit year only.
In what year did the Space Shuttle program fly its final mission? Answer with the four-digit year only.