| Prime Ministers of the UK | 0 | - | 4.95 | 441,570 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,159 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,826 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,975 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,129 |
| Biggest Trading Partners - South Africa | 0 | - | 4.74 | 40,401 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,719,865 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,792 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,510 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,430 |
| National Founders | 0 | - | 4.40 | 83,936 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,063 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,119 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,225 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,430 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,768 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,911 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,361 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,427 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,734 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,637 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,053 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,365 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,135 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,835 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,546 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,661 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,423 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,510 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,766 |
| Countries of the Popes | 0 | - | 4.79 | 128,590 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,798 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,712 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,360 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 101,153 |
| Political Movements by Country | 0 | - | 4.46 | 72,712 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,104 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,132 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,583 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,592 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,701 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,679 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,183 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,843 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,899 |
| Name that Greek Letter | 0 | - | 4.93 | 324,732 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,572 |
| Name the English Monarchs | 0 | - | 4.91 | 505,576 |
| Every African Country Shape | 0 | - | 4.90 | 88,135 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,906 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,230 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,139 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,482 |
| Presidential Middle Names | 0 | - | 4.41 | 60,632 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,581 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,836 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,592 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 53,058 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,616 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,095 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,889 |
| The Trojan War | 0 | - | 4.83 | 39,942 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,726 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,211 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,505 |
| Roman Emperors | 0 | - | 4.95 | 120,952 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,936 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,813 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 51,105 |
| Countries Closest to Egypt | 0 | - | 4.83 | 101,477 |
| Egypt Country Quiz | 0 | - | 4.83 | 77,854 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,044 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,435 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,454 |
| Hindu Countries | 0 | - | 4.87 | 50,492 |
| Africa Flags Map Quiz | 0 | - | 4.95 | 36,766 |
| Random African Flag to Country | 0 | - | 4.88 | 75,453 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,498 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,973 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,163 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,475 |
| The American Revolution | 0 | - | 4.52 | 54,328 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,101 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,333 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,917 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,120 |
| History of Russia Quiz | 0 | - | 4.47 | 31,988 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,131 |
| Ancient Greek Words | 0 | - | 4.93 | 112,288 |
| History of Italy | 0 | - | 4.55 | 32,117 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,548 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,192 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,790 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,396 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,651 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,051 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,496 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,987 |
| Countries that Beat Egypt | 0 | - | 4.91 | 66,677 |
| The Vietnam War | 0 | - | 4.44 | 35,628 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,684 |
| Random African Countries on a Map | 0 | - | 4.99 | 297,496 |
| Africa Map with Random Merged Countries | 0 | - | 4.94 | 74,224 |
| History of South Africa | 0 | - | 4.60 | 17,744 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,207 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,556 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,891 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,814 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,342 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,737 |
| First Ladies of the United States | 0 | - | 4.28 | 85,881 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,040 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,288 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,404 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,326 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,071 |
| Europe Map Quiz | 0 | - | 5.00 | 4,781,777 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,142 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,033 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,141 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,231 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,414 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,335 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,056 |
| History of Austria | 0 | - | 4.70 | 17,959 |
| Geography of the French Empire | 0 | - | 4.45 | 27,200 |
| The French Revolution | 0 | - | 4.47 | 24,120 |
| History of France | 0 | - | 4.61 | 57,495 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,546 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,521 |
| Mythology A-Z | 0 | - | 4.31 | 37,357 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,932 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,458 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,551 |
| The Vikings! | 0 | - | 4.46 | 28,396 |
| The Portuguese Empire | 0 | - | 4.58 | 12,096 |
| Arthurian Legend | 0 | - | 4.33 | 25,160 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,775 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,440 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,139 |
| Geography of the British Empire | 0 | - | 4.48 | 39,822 |
| Pope Facts | 0 | - | 4.39 | 31,353 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,362 |
| History of Iran | 0 | - | 4.66 | 16,409 |
| The Iraq War | 0 | - | 4.47 | 15,695 |
| History of China | 0 | - | 4.35 | 57,496 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,492 |
| History of India | 0 | - | 4.62 | 21,493 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,088 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 128,199 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,923 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,073 |
| Communist Countries in History | 0 | - | 4.63 | 497,592 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,311 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,173 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,315 |
| Australian Capitals | 0 | - | 4.92 | 62,810 |
| Australia A-Z | 0 | - | 4.54 | 50,108 |
| Australia Map Quiz | 0 | - | 4.95 | 345,856 |
| History of Mexico | 0 | - | 4.52 | 15,358 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,344 |
| U.S. States by Governor | 0 | - | 4.43 | 18,109 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,746 |
| American Political Words | 0 | - | 4.39 | 23,456 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,757 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,628 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,585 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,259 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,892 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,734 |
| U.S. President Scramble | 0 | - | 4.40 | 117,363 |
| The John Adams Presidency | 0 | - | 4.12 | 8,777 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,765 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,906 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,307 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,775 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,052 |
| Events in U.S. History | 0 | - | 4.41 | 28,786 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,178 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,341 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,543 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,853 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,382 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,600 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,819 |
| Official European Union Languages | 0 | - | 4.97 | 239,501 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,491 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,239 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,806 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,336 |
| The Only European Country ... | 0 | - | 4.91 | 218,484 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,219 |
| French History Multiple Choice | 0 | - | 4.55 | 33,189 |
| History of Germany | 0 | - | 4.39 | 52,952 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,185 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,012 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,181 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,798 |
