...millions of bacteria living in the human body
...diagonals in a hexagon
...athletes who have run the 100 meters in less than 10 seconds
...countries in Africa
...countries bordering the Indian Ocean
...countries whose flag features the color black
...divisors of the number 1000000
...pairs of spinal nerves in the human body
...landlocked countries
...teams that have participated in the Super Bowl
...books in the Bible
...states in the United States
...teeth in the mouth of a human being
...languages spoken by at least 20 million people
...countries that have won at least 50 medals at the Summer Olympics
...weeks in a year
...states that recognize Kosovo
...countries larger than France
...neutrons in a copper atom
...presidents in the history of the United States
...mountains above 6,000 meters in altitude
...football players who have won two World Cups
...living veterans of World War I
...letters in the Russian Cyrillic alphabet
...countries with more people than Australia
...Russian rubles in a dollar
...metals in the periodic table
...countries that do not border other countries
...squares in a chessboard
...teams that have won the UEFA Champions League.
...countries bordering Russia or China
...meters in 50 yards
...cities with more than one million inhabitants in China
...billionaires in the United Kingdom
...capitals further south of the equator.
...natural satellites around Saturn
...tennis players who have won a Grand Slam tournament
...popes with a pontificate of less than one year
...parliamentary republics in the world
...muscles in the hand
...countries in the Commonwealth of Nations
...astronomical units of distance between the Sun and Neptune