What is the capital of Nigeria? Answer with the city name only.
How many characters long is an ICAO airport code? Answer with the whole number only.
How many sovereign countries are there in South America? Answer with the whole number only.
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.
What is the capital of the US state of Pennsylvania? Answer with the city name only.
In what year was the Three Mile Island nuclear accident? Answer with the four-digit year only.
What is the capital of Ghana? Answer with the city name only.
The Large Hadron Collider ring is about how many kilometers in circumference? Answer with the whole number rounded to the nearest kilometer.
In what year did Montenegro declare independence? Answer with the four-digit year only.
In what year did Concorde enter commercial service? Answer with the four-digit year only.
What is the IATA code of Dubai International Airport? Answer with the three-letter code only.
What is the SI base unit of thermodynamic temperature? Answer with the unit name only, in lowercase.
How many dwarf planets does the International Astronomical Union officially recognize? Answer with the whole number only.
In what year did Isaac Newton publish Opticks? Answer with the four-digit year only.
Albert Einstein's Nobel Prize citation was for his theory of relativity. Answer true or false.
In what year did Paul Dirac publish his relativistic equation for the electron? Answer with the four-digit year only.
