| Prime Ministers of the UK | 0 | - | 4.95 | 441,750 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,721,108 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,453 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,648 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 238,124 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,169 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,143 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,844 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,308 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,526 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,788 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,684 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,787 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,176 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,173 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,972 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,599 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,712 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,463 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,379 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,412 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 389,662 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,802 |
| Countries of the Popes | 0 | - | 4.79 | 128,627 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,918 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,541 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,062 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,634 |
| Every European Country Shape | 0 | - | 4.96 | 202,743 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,917 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,077 |
| Name that Greek Letter | 0 | - | 4.93 | 324,786 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,555 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,303 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,779 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,567 |
| Name the English Monarchs | 0 | - | 4.91 | 505,759 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,122 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,387 |
| National Founders | 0 | - | 4.40 | 83,944 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,261 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,189 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,526 |
| Presidential Middle Names | 0 | - | 4.41 | 60,659 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,598 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,031 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,859 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,174 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,600 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,500 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,883 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,715 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,006 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,216 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,260 |
| The Trojan War | 0 | - | 4.83 | 39,947 |
| Ancient Greek Words | 0 | - | 4.93 | 112,313 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,780 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,270 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,555 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,525 |
| Roman Emperors | 0 | - | 4.95 | 121,003 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,329 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,858 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,842 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,739 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,381 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,133 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,859 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,348 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,745 |
| First Ladies of the United States | 0 | - | 4.28 | 85,905 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,048 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,294 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,414 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,336 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,077 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 55,848 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,927 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,153 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,821 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,903 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,595 |
| History of Russia Quiz | 0 | - | 4.47 | 31,993 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,451 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,357 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,073 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,624 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,123 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,936 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,547 |
| Word Chain - Greek and Roman Mythology | 0 | - | 4.50 | 56,936 |
| History of Italy | 0 | - | 4.55 | 32,119 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,447 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,795 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,405 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,059 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 396,752 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,507 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 51,933 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,096 |
| Pope Facts | 0 | - | 4.39 | 31,358 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,698 |
| Communist Countries in History | 0 | - | 4.63 | 497,702 |
| History of South Africa | 0 | - | 4.60 | 17,749 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,479 |
| Australian Capitals | 0 | - | 4.92 | 62,813 |
| Australia Map Quiz | 0 | - | 4.95 | 345,912 |
| History of Mexico | 0 | - | 4.52 | 15,358 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,989 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,109 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,585 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,641 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,592 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,260 |
| The George Washington Presidency | 0 | - | 4.03 | 14,595 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,897 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,742 |
| U.S. President Scramble | 0 | - | 4.40 | 117,385 |
| The John Adams Presidency | 0 | - | 4.12 | 8,778 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,976 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,771 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,371 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,749 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,914 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,315 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,527 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,061 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,358 |
| The American Civil War | 0 | - | 4.62 | 52,602 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,623 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,920 |
| Official European Union Languages | 0 | - | 4.97 | 239,558 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,522 |
| Europe Map Quiz | 0 | - | 5.00 | 4,782,894 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,045 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,453 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,182 |
| History of Austria | 0 | - | 4.70 | 17,963 |
| Geography of the French Empire | 0 | - | 4.45 | 27,202 |
| The French Revolution | 0 | - | 4.47 | 24,125 |
| History of France | 0 | - | 4.61 | 57,519 |
| French History Multiple Choice | 0 | - | 4.55 | 33,198 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,550 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,199 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,022 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,211 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,808 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,593 |
| Ancient Roman Trivia #2 | 0 | - | 4.60 | 44,205 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,175 |
| Roman Names for Places | 0 | - | 4.62 | 58,644 |
| Byzantine History | 0 | - | 4.91 | 29,000 |
| Byzantine Emperors | 0 | - | 4.93 | 14,533 |
| Largest Cities once part of the Byzantine Empire | 0 | - | 4.83 | 21,758 |
| History of The Netherlands | 0 | - | 4.46 | 17,537 |
| The Vikings! | 0 | - | 4.46 | 28,397 |
| The Portuguese Empire | 0 | - | 4.58 | 12,097 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,294 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 176,647 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,559 |
| Biggest Cities in the UK | 0 | - | 4.48 | 105,721 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,443 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,156 |
| Geography of the British Empire | 0 | - | 4.48 | 39,827 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,929 |
| British History A-Z #1 | 0 | - | 4.45 | 47,175 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,904 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 61,031 |
| Medieval English History | 0 | - | 4.53 | 43,630 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,284 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,060 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,975 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,451,478 |
| Asia Map Quiz | 0 | - | 4.99 | 923,866 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,447 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,386,616 |
| History of Iran | 0 | - | 4.66 | 16,409 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,049 |
| Chinese Inventions | 0 | - | 4.30 | 33,851 |
| History of China | 0 | - | 4.35 | 57,510 |
| History of India | 0 | - | 4.62 | 21,496 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,621 |
| Countries of Africa | 0 | - | 5.00 | 2,555,172 |
| Africa Map Quiz | 0 | - | 5.00 | 2,126,886 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,148 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,960 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 47,064 |
| Countries by Founding Story | 0 | - | 4.95 | 77,699 |
| Independence from Whom | 0 | - | 4.99 | 212,811 |
| Political Movements by Country | 0 | - | 4.46 | 72,725 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,264 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,777 |
| Morocco Country Quiz | 0 | - | 4.81 | 46,765 |
| D.R. Congo Country Quiz | 0 | - | 4.88 | 39,538 |
| Flags of Oceania | 0 | - | 5.00 | 262,139 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,339 |
| All First-Level Subdivisions of Oceania on a Map | 0 | - | 4.97 | 27,633 |
