| Prime Ministers of the UK | 0 | - | 4.96 | 436,597 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,789 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,274 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,673,633 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,616 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,226 |
| Australia Map Quiz | 0 | - | 4.94 | 343,254 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,673 |
| National Founders | 0 | - | 4.40 | 83,735 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 424,963 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,740 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,029 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,360 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,833 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,619 |
| Australia Cities Map Quiz | 0 | - | 4.83 | 144,844 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,815 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,676 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,935 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,521 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,853 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,951 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,482 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,366 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,711 |
| Political Movements by Country | 0 | - | 4.46 | 72,387 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,308 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,166 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,759 |
| 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 | 166,543 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,847 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,679 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,293 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,059 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,141 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,847 |
| Name the English Monarchs | 0 | - | 4.92 | 500,072 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,576 |
| Countries of the Popes | 0 | - | 4.79 | 127,597 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,696 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 119,402 |
| Hindu Countries | 0 | - | 4.86 | 49,817 |
| 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 | 32,430 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,710 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,775 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,780 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,408 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,468 |
| The Trojan War | 0 | - | 4.83 | 39,561 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,564 |
| Name that Greek Letter | 0 | - | 4.93 | 322,526 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,149 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,278 |
| Roman Emperors | 0 | - | 4.95 | 119,230 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,671 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,838 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,633 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,188 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,254 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,924 |
| 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 | 94,200 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,279 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,754 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,389 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,826 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,078 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,380 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,059 |
| History of Italy | 0 | - | 4.55 | 31,897 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,564 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,092 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,634 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,714 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 79,882 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,378 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,873 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,859 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,364 |
| 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 | 304,150 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,855 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,675 |
| The American Revolution | 0 | - | 4.52 | 54,147 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,510 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,232 |
| Europe Map Quiz | 0 | - | 5.00 | 4,745,627 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,847 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,922 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,002 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,146 |
| Ancient Greek Words | 0 | - | 4.93 | 111,093 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,376 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 107,942 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 190,341 |
| 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 | 278,146 |
| The Vietnam War | 0 | - | 4.43 | 35,407 |
| Communist Countries in History | 0 | - | 4.63 | 493,875 |
| History of India | 0 | - | 4.61 | 21,348 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,530 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 100,624 |
| History of South Africa | 0 | - | 4.60 | 17,636 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,526 |
| 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 | 135,627 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,197 |
| 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 | 76,668 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,083 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,883 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,733 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,847 |
| Official European Union Languages | 0 | - | 4.97 | 237,646 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,308 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,539 |
| Countries of Europe After World War II | 0 | - | 4.99 | 187,655 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,877 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,201 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,453 |
| History of Austria | 0 | - | 4.70 | 17,798 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,860 |
| History of France | 0 | - | 4.59 | 56,618 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,097 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,831 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,126 |
| The Vikings! | 0 | - | 4.46 | 28,285 |
| The Portuguese Empire | 0 | - | 4.58 | 12,027 |
| Arthurian Legend | 0 | - | 4.33 | 25,075 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,262 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,091 |
| Geography of the British Empire | 0 | - | 4.48 | 39,581 |
| Pope Facts | 0 | - | 4.39 | 31,131 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,879 |
| Asia Map Quiz | 0 | - | 4.99 | 910,862 |
| History of Iran | 0 | - | 4.66 | 16,307 |
| History of China | 0 | - | 4.37 | 56,914 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,043 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,571 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,420 |
| Countries by Founding Story | 0 | - | 4.95 | 76,864 |
| Independence from Whom | 0 | - | 4.99 | 210,791 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,314 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,209 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,310 |
| Countries of Africa | 0 | - | 5.00 | 2,521,184 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,250 |
| African East Coast | 0 | - | 4.96 | 95,515 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,357 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,194 |
| 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 | 4,148,339 |
| 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 | 44,406 |
| 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 | 40,539 |
| 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 | 47,776 |
| 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 | 211,066 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,464 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,154 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,911 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,203 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,744 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,299 |
| The Only European Country ... | 0 | - | 4.91 | 215,109 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,300 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,776 |
| French History Multiple Choice | 0 | - | 4.55 | 32,945 |
| History of Germany | 0 | - | 4.39 | 52,723 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,868 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,841 |
| Mythology A-Z | 0 | - | 4.31 | 37,101 |
