...prime numbers between 1 and 1000
...inches in 2 meters of length
...months in 7 years
...allied countries in World War II
...islands with more inhabitants than Malta
...popes in the history of the Church
...episodes in the series “Breaking Bad”
...countries that border at least one other country
...countries in Africa
...countries that recognize the state of Palestine
...drivers who have won at least one Formula 1 Grand Prix
...flags of countries that feature the color green
...Chinese zodiac signs
...natural satellites around Jupiter
...capitals further north than Mexico City
...cities with at least one million inhabitants in the world
...diagonals in a dodecagon
...letters in the Khmer alphabet
...countries that contain the letter A
...neutrons in a gold atom
...first generation Pokémon
...countries above the equator
...monarchies in the world
...churches in Rome
...countries larger than the Netherlands
...national teams that have qualified at least once for the World Cup
...buildings taller than the Great Pyramid of Giza
...departments in France
...inhabitants per square kilometer in China
...moles of water in a liter
...members of the United States Senate
...republics in the world
...elements on the periodic table
...bones in the human body
...countries with at least 10 million inhabitants
...countries bordering the Pacific Ocean
...degrees Celsius in 100 degrees Fahrenheit
...divisors of the number 1,000,000,000
...mountains over 7000 meters high
...footballers who have scored in a World Cup final
...countries that have won at least one gold medal at the Olympic Games
...leap years in 400 years