| Prime Ministers of the UK | 0 | - | 4.95 | 442,037 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.42 | 51,956 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,550 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,723,422 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,178 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,521 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,850 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,857 |
| Countries of the Popes | 0 | - | 4.79 | 128,677 |
| Did You Even Watch - The Crown? | 0 | - | 4.34 | 11,287 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,685 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,563 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,558 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 64,707 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 238,203 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,586 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,319 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,885 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,914 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,474 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,265 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,581 |
| Presidential Middle Names | 0 | - | 4.41 | 60,690 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,453 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,657 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,877 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,617 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,659 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,830 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,670 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,499 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,485 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,453 |
| Pope Facts | 0 | - | 4.39 | 31,375 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,126 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,753 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,182 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,201 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,276 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,173 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,670 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,770 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,507 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,117 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,406 |
| Roman to Greek God | 0 | - | 4.52 | 123,305 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,425 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,455 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 389,908 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,923 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,745 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,078 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,591 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,928 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,356 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,758 |
| First Ladies of the United States | 0 | - | 4.28 | 85,925 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,059 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,306 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,451 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,354 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,088 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 58,001 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,707 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,936 |
| Every European Country Shape | 0 | - | 4.96 | 202,839 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,633 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,923 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,509 |
| Name that Greek Letter | 0 | - | 4.93 | 324,871 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,610 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,338 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,826 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,656 |
| Name the English Monarchs | 0 | - | 4.91 | 506,058 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,543 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,906 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,448 |
| African Countries with the Most Christians | 0 | - | 4.94 | 76,048 |
| National Founders | 0 | - | 4.40 | 83,958 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,959 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,126 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,776 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,746 |
| The John Adams Presidency | 0 | - | 4.12 | 8,787 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,773 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,545 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,922 |
| The American Revolution | 0 | - | 4.52 | 54,347 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,977 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,733 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,219 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,098 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,358 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,973 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,497 |
| The Trojan War | 0 | - | 4.83 | 39,963 |
| Ancient Greek Words | 0 | - | 4.93 | 112,385 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,857 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 88,025 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,391 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,555 |
| Roman Emperors | 0 | - | 4.95 | 121,093 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,964 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,554 |
| Lord of the Rings Characters | 0 | - | 4.54 | 113,628 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 53,906 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,058 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,480 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,297 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,387 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,139 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,860 |
| The George Washington Presidency | 0 | - | 4.03 | 14,604 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,981 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,373 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,753 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,602 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,334 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,492 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,168 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,958 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,976 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,273 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,352 |
| History of Russia Quiz | 0 | - | 4.47 | 31,998 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,400 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,210 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,825 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,947 |
| History of Italy | 0 | - | 4.55 | 32,137 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,686 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,810 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,412 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 68,743 |
| Arthurian Legend | 0 | - | 4.33 | 25,168 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,076 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,172 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,641 |
| Vietnam War Countries | 0 | - | 4.82 | 94,570 |
| Countries of the Japanese Empire | 0 | - | 4.96 | 104,540 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,731 |
| Communist Countries in History | 0 | - | 4.63 | 497,944 |
| History of South Africa | 0 | - | 4.60 | 17,757 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,808 |
| Australian Capitals | 0 | - | 4.92 | 62,824 |
| Australia Map Quiz | 0 | - | 4.95 | 346,033 |
| History of Mexico | 0 | - | 4.52 | 15,360 |
| United States Map Quiz | 0 | - | 4.98 | 4,170,293 |
| Arms Exports - United States | 0 | - | 4.77 | 62,703 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,132 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,662 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 635,181 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,601 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,271 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,143 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,908 |
| U.S. President Scramble | 0 | - | 4.40 | 117,428 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,644 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,331 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,797 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,021 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,581 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,071 |
| The Kennedy Family | 0 | - | 3.90 | 14,099 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,386 |
| The American Civil War | 0 | - | 4.62 | 52,618 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,676 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 127,003 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,073 |
| Official European Union Languages | 0 | - | 4.97 | 239,674 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,569 |
| Europe Map Quiz | 0 | - | 5.00 | 4,785,211 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,262 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,628 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,434 |
| History of Austria | 0 | - | 4.70 | 17,968 |
| Geography of the French Empire | 0 | - | 4.45 | 27,209 |
| The French Revolution | 0 | - | 4.47 | 24,135 |
| History of France | 0 | - | 4.61 | 57,563 |
| French History Multiple Choice | 0 | - | 4.55 | 33,212 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,554 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,212 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,032 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,248 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,825 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,615 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,249 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,193 |
| Roman Names for Places | 0 | - | 4.62 | 58,671 |
| Byzantine History | 0 | - | 4.91 | 29,013 |
| Byzantine Emperors | 0 | - | 4.93 | 14,571 |
| History of The Netherlands | 0 | - | 4.46 | 17,543 |
| The Vikings! | 0 | - | 4.46 | 28,400 |
| The Portuguese Empire | 0 | - | 4.58 | 12,099 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,304 |
| Biggest Urban Areas in the UK | 0 | - | 4.43 | 176,681 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.56 | 65,568 |
| Biggest Cities in the UK | 0 | - | 4.48 | 105,771 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.56 | 34,486 |
