| Prime Ministers of the UK | 0 | - | 4.95 | 438,205 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.41 | 51,708 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,533 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,691,202 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,896 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 94,889 |
| Countries "Ruled" by King Charles III | 0 | - | 4.77 | 82,715 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,979 |
| Countries of the Popes | 0 | - | 4.79 | 127,965 |
| Did You Even Watch - The Crown? | 0 | - | 4.34 | 11,226 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,584 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,423 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,393 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,127 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,251 |
| Country by Photo of its Leader | 0 | - | 4.72 | 123,932 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,104 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,452 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,232 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,588 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,322 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,663 |
| Presidential Middle Names | 0 | - | 4.41 | 60,153 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,229 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,228 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,501 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,379 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,492 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,189 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,801 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,477 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,037 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,236 |
| Pope Facts | 0 | - | 4.39 | 31,218 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,058 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,263 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,954 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,909 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,994 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 79,069 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,396 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,793 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,700 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,654 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,914 |
| Roman to Greek God | 0 | - | 4.52 | 122,696 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,061 |
| Biggest British Empire Countries | 0 | - | 4.74 | 99,837 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 387,672 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,843 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,666 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,690 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,508 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,831 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,510 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,116 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,245 |
| First Ladies of the United States | 0 | - | 4.28 | 85,564 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,934 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,210 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,986 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,172 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,944 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,603 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,806 |
| Every European Country Shape | 0 | - | 4.96 | 201,425 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,458 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,776 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,518 |
| Name that Greek Letter | 0 | - | 4.93 | 323,224 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,991 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,658 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,161 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,348 |
| Name the English Monarchs | 0 | - | 4.91 | 501,854 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,989 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,098 |
| National Founders | 0 | - | 4.40 | 83,805 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,479 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,609 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,721 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,718 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,630 |
| The John Adams Presidency | 0 | - | 4.12 | 8,739 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,732 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,908 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,841 |
| The American Revolution | 0 | - | 4.52 | 54,224 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,833 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,433 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,319 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,994 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 317,729 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,375 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,025 |
| The Trojan War | 0 | - | 4.83 | 39,672 |
| Ancient Greek Words | 0 | - | 4.93 | 111,431 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,637 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,688 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,661 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,449 |
| Roman Emperors | 0 | - | 4.95 | 119,746 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,747 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,368 |
| Lord of the Rings Characters | 0 | - | 4.54 | 113,239 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,789 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,928 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,107 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,260 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,377 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,314 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,067 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,769 |
| The George Washington Presidency | 0 | - | 4.03 | 14,539 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,923 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,311 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,662 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,180 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,490 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,956 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,940 |
| Random European Countries on a Map | 0 | - | 4.97 | 283,186 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,008 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,162 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,347 |
| History of Russia Quiz | 0 | - | 4.49 | 31,897 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,955 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,811 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,559 |
| History of Italy | 0 | - | 4.55 | 31,952 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,637 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,633 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,184 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 67,235 |
| Arthurian Legend | 0 | - | 4.33 | 25,101 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,813 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 281,466 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,754 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,309 |
| Vietnam War Countries | 0 | - | 4.82 | 94,123 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,195 |
| Communist Countries in History | 0 | - | 4.63 | 495,151 |
| History of India | 0 | - | 4.62 | 21,406 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,413 |
| Countries of Africa | 0 | - | 5.00 | 2,532,156 |
| Africa Map Quiz | 0 | - | 5.00 | 2,115,688 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,981 |
| History of South Africa | 0 | - | 4.60 | 17,666 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,162 |
| Australian Capitals | 0 | - | 4.92 | 62,707 |
| Australia Map Quiz | 0 | - | 4.95 | 344,074 |
| History of Mexico | 0 | - | 4.58 | 15,297 |
| United States Map Quiz | 0 | - | 4.98 | 4,155,062 |
| Arms Exports - United States | 0 | - | 4.75 | 62,318 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,941 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,281 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 626,067 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,481 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,177 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,041 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,645 |
| U.S. President Scramble | 0 | - | 4.40 | 116,688 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,590 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,161 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,540 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,183 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,854 |
| The Kennedy Family | 0 | - | 3.90 | 14,064 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,973 |
| The American Civil War | 0 | - | 4.62 | 52,386 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,041 |
| Biggest European Cities by Letter | 0 | - | 4.54 | 126,581 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,142 |
| Official European Union Languages | 0 | - | 4.97 | 238,256 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,691 |
| Europe Map Quiz | 0 | - | 5.00 | 4,757,795 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,064 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,733 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 212,571 |
| History of Austria | 0 | - | 4.70 | 17,846 |
| Geography of the French Empire | 0 | - | 4.45 | 27,038 |
| The French Revolution | 0 | - | 4.46 | 23,916 |
| History of France | 0 | - | 4.59 | 56,890 |
| French History Multiple Choice | 0 | - | 4.55 | 33,010 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,466 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,954 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,886 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,538 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,620 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,273 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,707 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,873 |
| Roman Names for Places | 0 | - | 4.62 | 58,217 |
| Byzantine History | 0 | - | 4.91 | 28,767 |
| History of The Netherlands | 0 | - | 4.46 | 17,418 |
| The Vikings! | 0 | - | 4.46 | 28,332 |
| The Portuguese Empire | 0 | - | 4.58 | 12,054 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,134 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 176,227 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,457 |
