| Prime Ministers of the UK | 0 | - | 4.95 | 384,713 |
| Prime Ministers of Australia | 0 | - | 4.48 | 28,238 |
| Canadian Prime Ministers Quiz | 0 | - | 4.64 | 50,217 |
| Countries of the Popes | 0 | - | 4.82 | 112,053 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,203,446 |
| Country by Photo of its Leader | 0 | - | 4.78 | 116,156 |
| Biggest Trading Partners – Australia | 0 | - | 4.89 | 47,926 |
| Australia Map Quiz | 0 | - | 4.95 | 321,680 |
| Soviet Leaders 1917–1991 | 0 | - | 4.42 | 87,893 |
| National Founders | 0 | - | 4.39 | 79,988 |
| Paramount Leaders of China | 0 | - | 4.31 | 10,011 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 396,869 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 49,261 |
| The Dictator Files: Chairman Mao | 0 | - | 4.32 | 18,644 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 355,377 |
| Prime Ministers of Israel | 0 | - | 4.10 | 16,278 |
| Australia Cities Map Quiz | 0 | - | 4.85 | 132,315 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 223,278 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 169,031 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,062 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 63,913 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 50,450 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 59,689 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.42 | 24,185 |
| States of the German Confederation in 1848 | 0 | - | 4.84 | 26,878 |
| Political Movements by Country | 0 | - | 4.46 | 68,866 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 101,494 |
| English Monarchs Quiz | 0 | - | 4.91 | 451,283 |
| Name the Popes Quiz | 0 | - | 4.46 | 123,184 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 85,539 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 102,771 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 94,616 |
| African Countries with the Most Christians | 0 | - | 4.92 | 68,050 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 110,673 |
| Most Visited Countries by Australians | 0 | - | 4.95 | 84,722 |
| Countries that Visit Australia the Most | 0 | - | 4.92 | 60,578 |
| Countries Closest to Australia | 0 | - | 4.99 | 146,320 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 76,365 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,935 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.72 | 54,221 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 180,711 |
| Countries Italy Declared War On | 0 | - | 4.78 | 40,247 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.81 | 10,154 |
| Top 10 Richest Countries in Asia | 0 | - | 4.87 | 82,537 |
| Top 10 Richest Countries in Africa | 0 | - | 4.87 | 68,492 |
| Australia A-Z | 0 | - | 4.48 | 38,631 |
| Countries that Beat Australia | 0 | - | 4.84 | 70,918 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,395 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 159,251 |
| Top 10 Richest Countries in Europe | 0 | - | 4.88 | 136,686 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 65,565 |
| Category Elimination - European Countries #1 | 0 | - | 4.88 | 77,572 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 589,169 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.81 | 86,540 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 72,119 |
| Roman Emperors | 0 | - | 4.95 | 96,910 |
| Geography of the Dutch Empire | 0 | - | 4.70 | 32,589 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 75,044 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 50,652 |
| Invasions of Great Britain | 0 | - | 4.49 | 55,905 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.90 | 62,656 |
| Pope Facts | 0 | - | 4.41 | 28,166 |
| Biggest Trading Partners - Turkey | 0 | - | 4.82 | 45,554 |
| Biggest Trading Partners - China | 0 | - | 4.96 | 70,637 |
| Countries with the Most Hindus | 0 | - | 4.91 | 114,168 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 48,818 |
| Biggest Trading Partners - South Africa | 0 | - | 4.82 | 37,904 |
| U.S. Vice Presidents | 0 | - | 4.41 | 120,985 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 97,835 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 82,529 |
| U.S. Presidential Trivia #2 | 0 | - | 4.52 | 40,223 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,621 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,684 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 489,122 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.32 | 40,083 |
| The Reign of Napoleon | 0 | - | 4.53 | 36,301 |
| Biggest Trading Partners - Germany | 0 | - | 4.98 | 63,349 |
| Olympian Gods Quiz | 0 | - | 4.96 | 459,675 |
| Name that Greek Letter | 0 | - | 4.94 | 297,464 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 100,603 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 178,418 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.58 | 24,717 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 257,440 |
| Countries Closest to Israel | 0 | - | 4.86 | 99,490 |
| The Vietnam War | 0 | - | 4.41 | 33,049 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 247,251 |
| Famous Australians by Picture | 0 | - | 4.29 | 25,587 |
| Biggest Trading Partners - Colombia | 0 | - | 4.89 | 35,942 |
| U.S. Bill of Rights | 0 | - | 4.53 | 31,153 |
| American Political Words | 0 | - | 4.41 | 22,398 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,411 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.41 | 281,349 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,893 |
| The American Revolution | 0 | - | 4.51 | 51,909 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 196,566 |
| Europe Map Quiz | 0 | - | 5.00 | 4,329,472 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,702 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 149,152 |
| Save Europeans by Guessing Countries | 0 | - | 4.87 | 171,261 |
| Ancient Greek Words | 0 | - | 4.90 | 98,571 |
| Communist Countries in History | 0 | - | 4.65 | 458,846 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 402,540 |
| The Vikings! | 0 | - | 4.45 | 27,226 |
| The Portuguese Empire | 0 | - | 4.54 | 11,379 |
| Arthurian Legend | 0 | - | 4.35 | 24,334 |
| Wives of King Henry VIII | 0 | - | 4.55 | 50,589 |
| Countries the UK Declared War On | 0 | - | 4.58 | 113,266 |
| Geography of the British Empire | 0 | - | 4.51 | 37,285 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,351,965 |
| Asia Map Quiz | 0 | - | 4.99 | 794,812 |
| History of Iran Quiz | 0 | - | 4.63 | 15,196 |
| History of China | 0 | - | 4.38 | 50,943 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 99,028 |
| History of India | 0 | - | 4.52 | 19,412 |
| Africa Map Quiz | 0 | - | 5.00 | 1,952,793 |
| African Countries with the Most Muslims | 0 | - | 4.76 | 81,530 |
| History of South Africa | 0 | - | 4.59 | 16,649 |
| Oceania Map Quiz | 0 | - | 4.98 | 573,064 |
| Australian Capitals | 0 | - | 4.92 | 61,018 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.11 | 25,158 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.08 | 14,811 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.17 | 10,151 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,956 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,293 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 25,981 |
| First Ladies of the United States | 0 | - | 4.27 | 80,347 |
| Presidential Middle Names | 0 | - | 4.37 | 56,368 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,931 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 65,570 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 27,941 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,055 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 22,132 |
| Count to 10 in Europe: Pro | 0 | - | 4.81 | 61,494 |
| Official European Union Languages | 0 | - | 4.98 | 202,731 |
| European Countries in their Native Language | 0 | - | 4.99 | 145,416 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 390,085 |
| Countries of Europe After World War II | 0 | - | 4.98 | 172,344 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 140,881 |
| History of Russia Quiz | 0 | - | 4.48 | 30,022 |
| Countries of the Soviet Union | 0 | - | 4.98 | 185,678 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 74,980 |
| History of Austria | 0 | - | 4.69 | 16,499 |
| Geography of the French Empire | 0 | - | 4.49 | 25,539 |
| The French Revolution | 0 | - | 4.45 | 22,074 |
| History of France Quiz | 0 | - | 4.55 | 39,903 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 22,406 |
| Figures from Greek Mythology | 0 | - | 4.92 | 170,328 |
| History of Ireland Quiz | 0 | - | 4.44 | 19,074 |
| History of Italy | 0 | - | 4.49 | 29,942 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 78,934 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 40,258 |
| Countries by Founding Story | 0 | - | 4.93 | 55,503 |
| Independence from Whom | 0 | - | 4.99 | 187,784 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 114,746 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,567 |
| Geography of the Roman Empire | 0 | - | 4.57 | 48,769 |
| Roman Names for Places | 0 | - | 4.66 | 41,959 |
| Byzantine History | 0 | - | 4.87 | 26,415 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 73,027 |
| History of The Netherlands | 0 | - | 4.43 | 15,875 |
| Geography of the Spanish Empire | 0 | - | 4.48 | 35,375 |
| Countries that Beat Switzerland | 0 | - | 4.87 | 38,095 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 24,834 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.76 | 19,089 |
| Houses of British Monarchs | 0 | - | 4.50 | 52,562 |
| Medieval English History | 0 | - | 4.52 | 41,092 |
| British History Multiple Choice #1 | 0 | - | 4.47 | 51,863 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.56 | 13,850 |
| South and Central Asia Map Quiz | 0 | - | 4.93 | 81,081 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,288,938 |
| Countries that Have Controlled Mesopotamia | 0 | - | 4.16 | 14,560 |
| The Iraq War | 0 | - | 4.45 | 14,457 |
| Ottoman Empire Quiz | 0 | - | 4.42 | 15,814 |
| History of Egypt | 0 | - | 4.56 | 22,353 |
| Chinese Inventions | 0 | - | 4.26 | 32,674 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.58 | 52,066 |
| Hindu Countries | 0 | - | 4.72 | 33,402 |
| Countries of Africa | 0 | - | 5.00 | 2,197,121 |
| African East Coast | 0 | - | 4.97 | 85,151 |
| Western Africa Map Quiz | 0 | - | 4.97 | 61,707 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 41,091 |
| Cultural Symbols of Australia | 0 | - | 4.23 | 46,509 |
| Australian Animals By Picture | 0 | - | 4.44 | 29,411 |
| American Countries on the Pacific Coast | 0 | - | 4.81 | 46,536 |
| History of Mexico | 0 | - | 4.55 | 14,005 |
| United States Map Quiz | 0 | - | 4.98 | 3,922,339 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 17,015 |
| U.S. Political Parties in History | 0 | - | 4.43 | 26,265 |
| U.S. Government Agencies | 0 | - | 4.41 | 17,801 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,835 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,604 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,395 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 37,742 |
| U.S. President Scramble | 0 | - | 4.37 | 91,772 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.46 | 21,035 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 45,272 |
| U.S. History for Dummies | 0 | - | 4.50 | 65,939 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 196,477 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.93 | 87,066 |
| Countries That Use the Euro | 0 | - | 4.93 | 64,936 |
