| Answer | % Correct |
|---|---|
| ...weeks in a year | 58%
|
| ...states in the United States | 45%
|
| ...squares in a chessboard | 39%
|
| ...metals in the periodic table | 29%
|
| ...cities with more than one million inhabitants in China | 26%
|
| ...millions of bacteria living in the human body | 26%
|
| ...countries with more people than Australia | 23%
|
| ...countries in Africa | 19%
|
| ...books in the Bible | 16%
|
| ...mountains above 6,000 meters in altitude | 16%
|
| ...parliamentary republics in the world | 16%
|
| ...billionaires in the United Kingdom | 13%
|
| ...languages spoken by at least 20 million people | 13%
|
| ...tennis players who have won a Grand Slam tournament | 13%
|
| ...athletes who have run the 100 meters in less than 10 seconds | 10%
|
| ...states that recognize Kosovo | 10%
|
| ...natural satellites around Saturn | 6%
|
| ...Russian rubles in a dollar | 6%
|
| ...countries in the Commonwealth of Nations | 3%
|
| ...countries that have won at least 50 medals at the Summer Olympics | 3%
|
| ...countries whose flag features the color black | 3%
|