| Prime Ministers of the UK | 0 | - | 4.95 | 385,476 |
| Canadian Prime Ministers Quiz | 0 | - | 4.64 | 50,349 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 103,208 |
| Prime Ministers of Israel | 0 | - | 4.10 | 16,309 |
| English Monarchs Quiz | 0 | - | 4.91 | 452,128 |
| Countries of the Popes | 0 | - | 4.85 | 112,477 |
| Top 10 Richest Countries in Asia | 0 | - | 4.87 | 82,854 |
| Paramount Leaders of China | 0 | - | 4.31 | 10,019 |
| Prime Ministers of Australia | 0 | - | 4.48 | 28,298 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,209,928 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 67,218 |
| The Dictator Files: Chairman Mao | 0 | - | 4.32 | 18,657 |
| Country by Photo of its Leader | 0 | - | 4.78 | 116,352 |
| Biggest Trading Partners - Turkey | 0 | - | 4.82 | 45,688 |
| Biggest Trading Partners - China | 0 | - | 4.96 | 70,746 |
| Soviet Leaders 1917–1991 | 0 | - | 4.42 | 87,996 |
| National Founders | 0 | - | 4.39 | 80,057 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 49,388 |
| Countries Closest to Israel | 0 | - | 4.86 | 99,615 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 397,427 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 355,876 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 113,699 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 99,096 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 223,813 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 169,315 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,285 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 64,095 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 50,652 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 59,844 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.42 | 24,213 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 101,736 |
| Name the Popes Quiz | 0 | - | 4.46 | 123,594 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 85,715 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 94,814 |
| African Countries with the Most Christians | 0 | - | 4.92 | 68,179 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 110,813 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 76,407 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 67,993 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 181,057 |
| States of the German Confederation in 1848 | 0 | - | 4.84 | 26,951 |
| Countries Italy Declared War On | 0 | - | 4.76 | 40,302 |
| Political Movements by Country | 0 | - | 4.46 | 68,929 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.81 | 10,201 |
| Houses of British Monarchs | 0 | - | 4.50 | 52,635 |
| Every Asian Country Shape | 0 | - | 4.94 | 76,374 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 61,498 |
| The Iraq War | 0 | - | 4.45 | 14,473 |
| Biggest Cities once in the Ottoman Empire | 0 | - | 4.78 | 42,612 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,613 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 88,424 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 78,932 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,968 |
| Top 10 Richest Countries in Africa | 0 | - | 4.87 | 68,676 |
| Biggest Trading Partners – Australia | 0 | - | 4.89 | 48,285 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,411 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 159,483 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.72 | 54,276 |
| Top 10 Richest Countries in Europe | 0 | - | 4.88 | 136,949 |
| Biggest Trading Partners - European Union | 0 | - | 4.90 | 65,702 |
| Category Elimination - European Countries #1 | 0 | - | 4.88 | 77,723 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.32 | 40,124 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 590,134 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.81 | 86,787 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 72,197 |
| Roman Emperors | 0 | - | 4.95 | 97,123 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 100,746 |
| Biggest Trading Partners - Spain | 0 | - | 4.90 | 50,721 |
| Members of the British Royal Family | 0 | - | 4.11 | 109,700 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.90 | 63,122 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 178,872 |
| Pope Facts | 0 | - | 4.41 | 28,249 |
| World Capitals Closest to Jerusalem | 0 | - | 4.45 | 43,047 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 72,701 |
| Flags of Countries that Border China | 0 | - | 4.93 | 82,485 |
| Countries with the Most Hindus | 0 | - | 4.91 | 114,342 |
| Biggest Trading Partners - South Africa | 0 | - | 4.82 | 37,977 |
| Biggest Trading Partners - Colombia | 0 | - | 4.89 | 36,042 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,433 |
| U.S. Vice Presidents | 0 | - | 4.43 | 121,265 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 97,966 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 82,686 |
| U.S. Presidential Trivia #2 | 0 | - | 4.52 | 40,302 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,731 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,712 |
| The American Revolution | 0 | - | 4.55 | 51,947 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 149,395 |
| The Reign of Napoleon | 0 | - | 4.53 | 36,338 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 63,509 |
| Olympian Gods Quiz | 0 | - | 4.96 | 460,101 |
| Name that Greek Letter | 0 | - | 4.94 | 297,848 |
| Ancient Greek Words | 0 | - | 4.90 | 99,047 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.64 | 21,091 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 403,294 |
| Geography of the Dutch Empire | 0 | - | 4.70 | 32,626 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 75,103 |
| Invasions of Great Britain | 0 | - | 4.49 | 55,961 |
| English Royal Consorts | 0 | - | 4.29 | 34,765 |
| The Reign of Queen Elizabeth I | 0 | - | 4.50 | 29,846 |
| The Reign of Queen Elizabeth II | 0 | - | 4.38 | 33,912 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.58 | 24,821 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,882 |
| Random Asian Countries on a Map | 0 | - | 4.96 | 153,432 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 44,548 |
| Israel Country Quiz | 0 | - | 4.04 | 70,508 |
| The Vietnam War | 0 | - | 4.41 | 33,080 |
| Colonies of Africa with a Map | 0 | - | 4.80 | 48,898 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,168 |
| American Political Words | 0 | - | 4.41 | 22,410 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,971 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,323 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 26,024 |
| First Ladies of the United States | 0 | - | 4.27 | 80,489 |
| Presidential Middle Names | 0 | - | 4.37 | 56,409 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,941 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 65,772 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.43 | 281,675 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 28,115 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,078 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,995 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 22,157 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 196,908 |
| Europe Map Quiz | 0 | - | 5.00 | 4,336,878 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 489,909 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,764 |
| Countries of Europe After World War II | 0 | - | 4.98 | 172,622 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 141,099 |
| Countries of the Soviet Union | 0 | - | 4.98 | 185,816 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 22,518 |
| Communist Countries in History | 0 | - | 4.65 | 459,554 |
| Byzantine History | 0 | - | 4.87 | 26,451 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 73,222 |
| History of The Netherlands | 0 | - | 4.43 | 15,902 |
| The Vikings! | 0 | - | 4.45 | 27,254 |
| The Portuguese Empire | 0 | - | 4.54 | 11,393 |
| Arthurian Legend | 0 | - | 4.35 | 24,344 |
| Wives of King Henry VIII | 0 | - | 4.55 | 51,374 |
| Countries the UK Declared War On | 0 | - | 4.58 | 113,419 |
| Geography of the British Empire | 0 | - | 4.51 | 37,333 |
| The Reign of Henry VIII | 0 | - | 4.24 | 26,407 |
| Medieval English History | 0 | - | 4.52 | 41,132 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.29 | 23,457 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 22,310 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.56 | 13,858 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,353,205 |
| Asia Map Quiz | 0 | - | 4.99 | 796,501 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 257,798 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 63,769 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.66 | 59,901 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 108,961 |
| History of Iran Quiz | 0 | - | 4.63 | 15,240 |
| Biggest Cities in Turkey on a Map | 0 | - | 4.21 | 17,452 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 15,836 |
| Countries that Beat Israel | 0 | - | 4.42 | 26,914 |
| Vietnam War Countries | 0 | - | 4.81 | 86,924 |
| Chinese Inventions | 0 | - | 4.26 | 32,687 |
| History of China | 0 | - | 4.38 | 51,065 |
| History of India | 0 | - | 4.52 | 19,443 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.58 | 52,145 |
| Africa Map Quiz | 0 | - | 5.00 | 1,955,412 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 247,553 |
| African Countries with the Most Muslims | 0 | - | 4.76 | 81,805 |
| History of South Africa | 0 | - | 4.59 | 16,671 |
| Oceania Map Quiz | 0 | - | 4.98 | 574,228 |
| Australian Capitals | 0 | - | 4.92 | 61,055 |
| History of Mexico | 0 | - | 4.55 | 14,019 |
| United States Map Quiz | 0 | - | 4.98 | 3,925,792 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.11 | 25,170 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.08 | 14,820 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.17 | 10,163 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,855 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,621 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,430 |
| People in Pictures with Ronald Reagan | 0 | - | 4.36 | 37,835 |
| U.S. President Scramble | 0 | - | 4.39 | 96,397 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,085 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 45,314 |
| Count to 10 in Europe: Pro | 0 | - | 4.81 | 61,626 |
| Official European Union Languages | 0 | - | 4.98 | 203,103 |
| European Countries in their Native Language | 0 | - | 4.99 | 145,614 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 391,075 |
| Least Forested Countries in Asia | 0 | - | 4.79 | 61,020 |
| Save Europeans by Guessing Countries | 0 | - | 4.87 | 171,902 |
| History of Russia Quiz | 0 | - | 4.48 | 30,060 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 88,137 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 75,085 |
| History of Austria | 0 | - | 4.69 | 16,518 |
| Geography of the French Empire | 0 | - | 4.49 | 25,574 |
| The French Revolution | 0 | - | 4.45 | 22,090 |
| History of France Quiz | 0 | - | 4.55 | 39,953 |
| Ancient Greek Trivia | 0 | - | 4.55 | 63,742 |
| Mythology A-Z | 0 | - | 4.29 | 34,298 |
| Figures from Greek Mythology | 0 | - | 4.92 | 170,509 |
| History of Ireland Quiz | 0 | - | 4.44 | 19,115 |
| History of Italy | 0 | - | 4.49 | 29,978 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 79,155 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 40,350 |
| Countries by Founding Story | 0 | - | 4.93 | 55,622 |
| Independence from Whom | 0 | - | 4.99 | 188,161 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 115,010 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,659 |
