| Prime Ministers of the UK | 0 | - | 4.95 | 381,764 |
| Canadian Prime Ministers Quiz | 0 | - | 4.64 | 49,723 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 101,920 |
| Countries of the Popes | 0 | - | 4.85 | 109,484 |
| Top 10 Richest Countries in Asia | 0 | - | 4.87 | 81,206 |
| Paramount Leaders of China | 0 | - | 4.31 | 9,951 |
| Prime Ministers of Australia | 0 | - | 4.48 | 27,891 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,176,102 |
| Country by Photo of its Leader | 0 | - | 4.79 | 115,355 |
| The Dictator Files: Chairman Mao | 0 | - | 4.32 | 18,541 |
| Biggest Trading Partners - Turkey | 0 | - | 4.82 | 45,004 |
| Prime Ministers of Israel | 0 | - | 4.10 | 16,149 |
| Biggest Trading Partners - China | 0 | - | 4.96 | 70,118 |
| Soviet Leaders 1917–1991 | 0 | - | 4.42 | 87,457 |
| National Founders | 0 | - | 4.38 | 79,667 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 394,871 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 48,780 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 353,394 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 111,828 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 98,547 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 222,265 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 167,378 |
| Play-Doh Presidents | 0 | - | 5.00 | 74,642 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 133,892 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 62,968 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 49,441 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 58,868 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.42 | 24,035 |
| States of the German Confederation in 1848 | 0 | - | 4.83 | 26,579 |
| Political Movements by Country | 0 | - | 4.46 | 68,584 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 100,234 |
| English Monarchs Quiz | 0 | - | 4.91 | 447,748 |
| Name the Popes Quiz | 0 | - | 4.46 | 121,208 |
| Every Asian Country Shape | 0 | - | 4.93 | 75,293 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 84,701 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,222 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 93,735 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,486 |
| Countries Bordering India | 0 | - | 4.98 | 156,122 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.57 | 51,804 |
| Countries Closest to India | 0 | - | 4.96 | 94,240 |
| African Countries with the Most Christians | 0 | - | 4.92 | 67,454 |
| Top 10 Richest Countries in Africa | 0 | - | 4.87 | 67,878 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 109,676 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 75,933 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,331 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,673 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 158,290 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.71 | 53,885 |
| Top 10 Richest Countries in Europe | 0 | - | 4.88 | 135,445 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 179,066 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 64,942 |
| Category Elimination - European Countries #1 | 0 | - | 4.87 | 76,807 |
| Countries Italy Declared War On | 0 | - | 4.79 | 39,988 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.82 | 9,929 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 71,771 |
| Roman Emperors | 0 | - | 4.95 | 96,072 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 60,743 |
| Countries Bordering China Since 1914 | 0 | - | 4.91 | 87,833 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 78,081 |
| Hindu Countries | 0 | - | 4.72 | 32,970 |
| Biggest Trading Partners - Australia | 0 | - | 4.88 | 42,923 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.32 | 39,884 |
| The Trojan War | 0 | - | 4.81 | 35,980 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 585,018 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.81 | 85,619 |
| Geography of the Dutch Empire | 0 | - | 4.70 | 32,466 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 74,761 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 100,008 |
| Biggest Trading Partners - Spain | 0 | - | 4.90 | 50,319 |
| Invasions of Great Britain | 0 | - | 4.49 | 55,646 |
| Biggest Trading Partners - UK | 0 | - | 4.86 | 57,100 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 177,437 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.58 | 24,417 |
| Pope Facts | 0 | - | 4.41 | 27,308 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,450 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 71,781 |
| Countries Closest to Israel | 0 | - | 4.88 | 98,756 |
| Flags of Countries that Border China | 0 | - | 4.93 | 81,827 |
| Countries with the Most Hindus | 0 | - | 4.92 | 113,329 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 48,411 |
| Biggest Trading Partners - South Africa | 0 | - | 4.82 | 37,596 |
| Biggest Trading Partners - Colombia | 0 | - | 4.89 | 35,547 |
| U.S. Bill of Rights | 0 | - | 4.56 | 31,079 |
| American Political Words | 0 | - | 4.41 | 22,326 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,367 |
| U.S. Vice Presidents | 0 | - | 4.42 | 119,730 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 97,071 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 81,706 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 39,802 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,120 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,566 |
| The American Revolution | 0 | - | 4.51 | 51,714 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 457,794 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 148,149 |
| The Reign of Napoleon | 0 | - | 4.53 | 36,130 |
| Biggest Trading Partners - Germany | 0 | - | 4.98 | 62,645 |
| Olympian Gods Quiz | 0 | - | 4.96 | 457,636 |
| Name that Greek Letter | 0 | - | 4.94 | 296,194 |
| Ancient Greek Words | 0 | - | 4.90 | 97,665 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.64 | 20,927 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 400,079 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 255,649 |
| Random Asian Countries on a Map | 0 | - | 4.96 | 152,136 |
| The Vietnam War | 0 | - | 4.41 | 32,849 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 245,081 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.44 | 279,222 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,300 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 195,182 |
| Europe Map Quiz | 0 | - | 5.00 | 4,299,775 |
| Save Europeans by Guessing Countries | 0 | - | 4.87 | 167,623 |
| Countries of Europe After World War II | 0 | - | 4.98 | 171,074 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 139,770 |
| Countries of the Soviet Union | 0 | - | 4.98 | 184,975 |
| Communist Countries in History | 0 | - | 4.63 | 455,958 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 66,729 |
| Byzantine History | 0 | - | 4.87 | 26,254 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 72,088 |
| History of The Netherlands | 0 | - | 4.42 | 15,782 |
| The Vikings! | 0 | - | 4.45 | 27,123 |
| The Portuguese Empire | 0 | - | 4.54 | 11,344 |
| Arthurian Legend | 0 | - | 4.35 | 24,294 |
| Wives of King Henry VIII | 0 | - | 4.53 | 44,647 |
| Countries the UK Declared War On | 0 | - | 4.58 | 112,421 |
| Geography of the British Empire | 0 | - | 4.50 | 37,068 |
| Medieval English History | 0 | - | 4.52 | 40,827 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.55 | 13,802 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,346,267 |
| Asia Map Quiz | 0 | - | 4.99 | 787,084 |
| Most Guessed Asian Capitals | 0 | - | 4.51 | 63,472 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.66 | 59,440 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 108,099 |
| History of Iran Quiz | 0 | - | 4.63 | 15,129 |
| The Iraq War | 0 | - | 4.43 | 14,382 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 15,693 |
| Vietnam War Countries | 0 | - | 4.81 | 86,490 |
| Chinese Inventions | 0 | - | 4.26 | 32,606 |
| History of China | 0 | - | 4.39 | 50,499 |
| History of India | 0 | - | 4.52 | 19,260 |
| Countries that Visit India the Most | 0 | - | 4.55 | 40,092 |
| Africa Map Quiz | 0 | - | 5.00 | 1,941,365 |
| African Countries with the Most Muslims | 0 | - | 4.76 | 81,066 |
| History of South Africa | 0 | - | 4.59 | 16,583 |
| Oceania Map Quiz | 0 | - | 4.98 | 568,845 |
| Australian Capitals | 0 | - | 4.92 | 60,778 |
| History of Mexico | 0 | - | 4.55 | 13,918 |
| United States Map Quiz | 0 | - | 4.98 | 3,906,134 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.11 | 25,098 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.08 | 14,772 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.17 | 10,116 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,899 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,116 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 25,747 |
| First Ladies of the United States | 0 | - | 4.27 | 79,942 |
| Presidential Middle Names | 0 | - | 4.37 | 56,142 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,526 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,851 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.31 | 64,571 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,229 |
| Random U.S. Vice President to President | 0 | - | 4.57 | 23,243 |
| U.S. President Scramble | 0 | - | 4.37 | 90,926 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 13,913 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 21,936 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 20,895 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 45,123 |
| Count to 10 in Europe: Pro | 0 | - | 4.80 | 61,053 |
| Official European Union Languages | 0 | - | 4.98 | 200,684 |
| European Countries in their Native Language | 0 | - | 4.99 | 144,089 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 386,831 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,470 |
| Least Forested Countries in Asia | 0 | - | 4.79 | 60,613 |
| History of Russia Quiz | 0 | - | 4.48 | 29,887 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 87,496 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 74,603 |
| History of Austria | 0 | - | 4.68 | 16,408 |
| Geography of the French Empire | 0 | - | 4.49 | 25,436 |
| The French Revolution | 0 | - | 4.45 | 21,943 |
| History of France Quiz | 0 | - | 4.55 | 39,716 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 21,943 |
| Ancient Greek Trivia | 0 | - | 4.55 | 63,445 |
| Mythology A-Z | 0 | - | 4.28 | 34,068 |
| Figures from Greek Mythology | 0 | - | 4.92 | 169,577 |
| History of Ireland Quiz | 0 | - | 4.44 | 18,938 |
| History of Italy | 0 | - | 4.49 | 29,817 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 78,025 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 39,864 |
| Countries by Founding Story | 0 | - | 4.92 | 54,972 |
| Independence from Whom | 0 | - | 4.99 | 185,841 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 113,609 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,188 |
| Add A Letter - Make a European City | 0 | - | 4.86 | 20,873 |
| Ancient Roman Trivia #2 | 0 | - | 4.55 | 35,417 |
| Geography of the Roman Empire | 0 | - | 4.55 | 48,545 |
| The Life of Julius Caesar | 0 | - | 4.46 | 32,134 |
| Roman Names for Places | 0 | - | 4.66 | 41,580 |
| History of Spain Quiz | 0 | - | 4.33 | 19,581 |
| Geography of the Spanish Empire | 0 | - | 4.48 | 35,248 |
| Countries that Beat Switzerland | 0 | - | 4.85 | 37,688 |
| Counties of England | 0 | - | 4.96 | 691,705 |
| Members of the British Royal Family | 0 | - | 4.11 | 109,335 |
