| Prime Ministers of the UK | 0 | - | 4.96 | 436,615 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,789 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,275 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,673,738 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,618 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,226 |
| Australia Map Quiz | 0 | - | 4.94 | 343,258 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,673 |
| National Founders | 0 | - | 4.40 | 83,735 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,974 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,741 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,029 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,366 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,834 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,620 |
| Australia Cities Map Quiz | 0 | - | 4.83 | 144,844 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,816 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,677 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,935 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,522 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,855 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,954 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,487 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,368 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,711 |
| Political Movements by Country | 0 | - | 4.46 | 72,390 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,309 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,167 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,762 |
| Most Visited Countries by Australians | 0 | - | 4.94 | 90,381 |
| Countries that Visit Australia the Most | 0 | - | 4.92 | 68,766 |
| Countries Closest to Australia | 0 | - | 4.99 | 166,545 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,848 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,680 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,294 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,065 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,141 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,851 |
| Name the English Monarchs | 0 | - | 4.92 | 500,088 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,577 |
| Countries of the Popes | 0 | - | 4.79 | 127,604 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,700 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 119,431 |
| Hindu Countries | 0 | - | 4.86 | 49,818 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,517 |
| Australia A-Z | 0 | - | 4.54 | 49,874 |
| Countries that Beat Australia | 0 | - | 4.92 | 92,395 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,975 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,431 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,710 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,776 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,782 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,410 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,473 |
| The Trojan War | 0 | - | 4.83 | 39,564 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,580 |
| Name that Greek Letter | 0 | - | 4.93 | 322,528 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,156 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,281 |
| Roman Emperors | 0 | - | 4.95 | 119,233 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,675 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,843 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,635 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,189 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,257 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,925 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,322 |
| Presidential Middle Names | 0 | - | 4.41 | 59,924 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,979 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,202 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,280 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,758 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,390 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,827 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,079 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,393 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,063 |
| History of Italy | 0 | - | 4.55 | 31,897 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,566 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,092 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,635 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,714 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 79,883 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,381 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,873 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,862 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,369 |
| Famous Australians by Picture | 0 | - | 4.25 | 28,681 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,131 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,152 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,856 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,676 |
| The American Revolution | 0 | - | 4.52 | 54,147 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,516 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,235 |
| Europe Map Quiz | 0 | - | 5.00 | 4,745,735 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,848 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,927 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,008 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,149 |
| Ancient Greek Words | 0 | - | 4.93 | 111,094 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,377 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 107,942 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,343 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,462 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,644 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,150 |
| The Vietnam War | 0 | - | 4.43 | 35,408 |
| Communist Countries in History | 0 | - | 4.63 | 493,886 |
| History of India | 0 | - | 4.61 | 21,349 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,573 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,625 |
| History of South Africa | 0 | - | 4.60 | 17,637 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,535 |
| Australian Capitals | 0 | - | 4.92 | 62,657 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,115 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,490 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.20 | 10,833 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,629 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,198 |
| First Ladies of the United States | 0 | - | 4.28 | 85,373 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,160 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,669 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,083 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,884 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,733 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,848 |
| Official European Union Languages | 0 | - | 4.97 | 237,651 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,309 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,541 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,659 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,881 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,205 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,453 |
| History of Austria | 0 | - | 4.70 | 17,800 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,860 |
| History of France | 0 | - | 4.59 | 56,623 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,099 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,835 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,133 |
| The Vikings! | 0 | - | 4.46 | 28,286 |
| The Portuguese Empire | 0 | - | 4.58 | 12,027 |
| Arthurian Legend | 0 | - | 4.33 | 25,075 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,263 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,092 |
| Geography of the British Empire | 0 | - | 4.48 | 39,582 |
| Pope Facts | 0 | - | 4.39 | 31,132 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,886 |
| Asia Map Quiz | 0 | - | 4.99 | 910,899 |
| History of Iran | 0 | - | 4.66 | 16,307 |
| History of China | 0 | - | 4.37 | 56,915 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,045 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,574 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,423 |
| Countries by Founding Story | 0 | - | 4.95 | 76,866 |
| Independence from Whom | 0 | - | 4.99 | 210,796 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,317 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,210 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,310 |
| Countries of Africa | 0 | - | 5.00 | 2,521,264 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,255 |
| African East Coast | 0 | - | 4.96 | 95,516 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,357 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,195 |
| Cultural Symbols of Australia | 0 | - | 4.24 | 47,915 |
| Australian Animals By Picture | 0 | - | 4.45 | 31,520 |
| History of Mexico | 0 | - | 4.58 | 15,260 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,375 |
| U.S. States by Governor | 0 | - | 4.43 | 18,015 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,620 |
| American Political Words | 0 | - | 4.39 | 23,376 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,604 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,118 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,407 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,129 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,871 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,540 |
| U.S. President Scramble | 0 | - | 4.40 | 116,461 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,087 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,777 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,046 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,729 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,069 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,465 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,154 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,922 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,210 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,744 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,303 |
| The Only European Country ... | 0 | - | 4.91 | 215,120 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,307 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,781 |
| French History Multiple Choice | 0 | - | 4.55 | 32,946 |
| History of Germany | 0 | - | 4.39 | 52,724 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,868 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,841 |
| Mythology A-Z | 0 | - | 4.31 | 37,103 |
