| Prime Ministers of the UK | 0 | - | 4.95 | 439,937 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 51,806 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,871 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,707,026 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,996 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,177 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,774 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,406 |
| Countries of the Popes | 0 | - | 4.79 | 128,312 |
| Did You Even Watch - The Crown? | 0 | - | 4.34 | 11,244 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,642 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,488 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 144,922 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,383 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,652 |
| Country by Photo of its Leader | 0 | - | 4.72 | 124,245 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,979 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,618 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,513 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,909 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,687 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,971 |
| Presidential Middle Names | 0 | - | 4.41 | 60,391 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,254 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,439 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,657 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,477 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,535 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,447 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,181 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,783 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,264 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,332 |
| Pope Facts | 0 | - | 4.39 | 31,288 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,089 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,714 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,044 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,047 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,698 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,209 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,045 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,286 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,108 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,843 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,171 |
| Roman to Greek God | 0 | - | 4.52 | 122,998 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,250 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,165 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 388,650 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,873 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,700 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,063 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,750 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,931 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,554 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,448 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,278 |
| First Ladies of the United States | 0 | - | 4.28 | 85,726 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,977 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,243 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,229 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,234 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,996 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,039 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,853 |
| Every European Country Shape | 0 | - | 4.96 | 202,146 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,547 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,861 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,681 |
| Name that Greek Letter | 0 | - | 4.93 | 324,116 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,275 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 42,040 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,478 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,943 |
| Name the English Monarchs | 0 | - | 4.91 | 503,780 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,237 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,437 |
| National Founders | 0 | - | 4.40 | 83,872 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,691 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,671 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,321 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,747 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,667 |
| The John Adams Presidency | 0 | - | 4.12 | 8,759 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,747 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,195 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,869 |
| The American Revolution | 0 | - | 4.52 | 54,289 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,342 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,565 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,730 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,464 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 319,240 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,650 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,746 |
| The Trojan War | 0 | - | 4.83 | 39,790 |
| Ancient Greek Words | 0 | - | 4.93 | 111,874 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,192 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,868 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,454 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,640 |
| Roman Emperors | 0 | - | 4.95 | 120,345 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,837 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,452 |
| Lord of the Rings Characters | 0 | - | 4.54 | 113,417 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,860 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,978 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,276 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,272 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,536 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,347 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,103 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,830 |
| The George Washington Presidency | 0 | - | 4.03 | 14,561 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,947 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,332 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,703 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,388 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,258 |
| Category Elimination - U.S. States #2 | 0 | - | 4.83 | 134,569 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,044 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,229 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,474 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,673 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,815 |
| History of Russia Quiz | 0 | - | 4.47 | 31,945 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,141 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,554 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,682 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,834 |
| History of Italy | 0 | - | 4.55 | 32,047 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,200 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,716 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,292 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 68,017 |
| Arthurian Legend | 0 | - | 4.33 | 25,128 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,947 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 37,957 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,451 |
| Vietnam War Countries | 0 | - | 4.82 | 94,345 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,355 |
| Communist Countries in History | 0 | - | 4.63 | 496,423 |
| History of India | 0 | - | 4.62 | 21,449 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.69 | 55,513 |
| Countries of Africa | 0 | - | 5.00 | 2,543,818 |
| Africa Map Quiz | 0 | - | 5.00 | 2,121,290 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,556 |
| History of South Africa | 0 | - | 4.60 | 17,714 |
| Oceania Map Quiz | 0 | - | 4.98 | 643,649 |
| Australian Capitals | 0 | - | 4.92 | 62,748 |
| Australia Map Quiz | 0 | - | 4.95 | 345,007 |
| History of Mexico | 0 | - | 4.58 | 15,333 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,050 |
| Arms Exports - United States | 0 | - | 4.77 | 62,507 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,029 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,454 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 629,748 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,534 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,210 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,113 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,743 |
| U.S. President Scramble | 0 | - | 4.40 | 116,903 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,617 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,214 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,636 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,338 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,942 |
| The Kennedy Family | 0 | - | 3.90 | 14,082 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,178 |
| The American Civil War | 0 | - | 4.62 | 52,488 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,304 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,763 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,967 |
| Official European Union Languages | 0 | - | 4.97 | 238,875 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,099 |
| Europe Map Quiz | 0 | - | 5.00 | 4,769,827 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,458 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,925 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,454 |
| History of Austria | 0 | - | 4.70 | 17,900 |
| Geography of the French Empire | 0 | - | 4.45 | 27,151 |
| The French Revolution | 0 | - | 4.47 | 24,054 |
| History of France | 0 | - | 4.59 | 57,249 |
| French History Multiple Choice | 0 | - | 4.55 | 33,116 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,066 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,945 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,860 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,702 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,403 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,784 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,986 |
| Roman Names for Places | 0 | - | 4.62 | 58,389 |
| Byzantine History | 0 | - | 4.91 | 28,910 |
| Byzantine Emperors | 0 | - | 4.92 | 14,349 |
| History of The Netherlands | 0 | - | 4.46 | 17,476 |
| The Vikings! | 0 | - | 4.46 | 28,368 |
| The Portuguese Empire | 0 | - | 4.58 | 12,081 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,215 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 176,425 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,510 |
