| Prime Ministers of the UK | 0 | - | 4.96 | 434,405 |
| Countries Most-Visited By Queen Elizabeth II | 0 | - | 4.40 | 51,463 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,325 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,651,633 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,659 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,393 |
| Countries "Ruled" by King Charles III | 0 | - | 4.77 | 82,591 |
| Name the Popes Quiz | 0 | - | 4.47 | 137,064 |
| Countries of the Popes | 0 | - | 4.79 | 127,141 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,815 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,301 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 143,095 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,372 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,148 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,202 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,482 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,008 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,464 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,852 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,900 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,421 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,962 |
| Presidential Middle Names | 0 | - | 4.41 | 59,669 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,454 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,699 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,777 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,153 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,718 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,639 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 87,990 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,768 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,591 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,017 |
| Pope Facts | 0 | - | 4.39 | 31,026 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,996 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,261 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,723 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,419 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,857 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,355 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,315 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,051 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,963 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,204 |
| Roman to Greek God | 0 | - | 4.52 | 122,164 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,707 |
| Biggest British Empire Countries | 0 | - | 4.73 | 87,263 |
| Shakespeare's Plays Quiz | 0 | - | 4.38 | 385,586 |
| The Dictator Files: Saddam Hussein | 0 | - | 4.48 | 15,747 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,568 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,792 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,826 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,504 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,369 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,161 |
| First Ladies of the United States | 0 | - | 4.28 | 85,223 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,810 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,106 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,231 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,994 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,824 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,190 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,678 |
| Every European Country Shape | 0 | - | 4.96 | 200,028 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,272 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,623 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,503 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,542 |
| Name that Greek Letter | 0 | - | 4.94 | 321,522 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,327 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,108 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,446 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,181 |
| Name the English Monarchs | 0 | - | 4.92 | 497,663 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 61,492 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,152 |
| National Founders | 0 | - | 4.40 | 83,636 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,926 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,457 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,295 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,654 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,487 |
| The John Adams Presidency | 0 | - | 4.12 | 8,674 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,679 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,365 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,768 |
| The American Revolution | 0 | - | 4.52 | 54,045 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,633 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,119 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,412 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,857 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,727 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,538 |
| The Trojan War | 0 | - | 4.83 | 39,414 |
| Ancient Greek Words | 0 | - | 4.92 | 110,623 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,473 |
| Things with Names from Classical Mythology | 0 | - | 4.28 | 87,146 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,166 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,018 |
| Roman Emperors | 0 | - | 4.95 | 118,382 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,494 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,108 |
| Lord of the Rings Characters | 0 | - | 4.54 | 112,664 |
| 10 Plagues of Egypt | 0 | - | 4.41 | 49,369 |
| Prime Ministers of Israel | 0 | - | 3.97 | 17,812 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,660 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,917 |
| The Dictator Files: Fidel Castro | 0 | - | 4.19 | 12,253 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,874 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,668 |
| The George Washington Presidency | 0 | - | 4.03 | 14,471 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,865 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,204 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,605 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,652 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,305 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,383 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,734 |
| Random European Countries on a Map | 0 | - | 4.97 | 281,851 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 216,090 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 315,578 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,638 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,288 |
| History of Russia Quiz | 0 | - | 4.49 | 31,783 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,512 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,397 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,282 |
| History of Italy | 0 | - | 4.55 | 31,806 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 101,412 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,471 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,972 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,076 |
| Arthurian Legend | 0 | - | 4.33 | 25,049 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,373 |
| Groups of Things - Harry Potter | 0 | - | 4.82 | 280,039 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.91 | 37,078 |
| Vatican City Country Quiz | 0 | - | 4.53 | 43,979 |
| Vietnam War Countries | 0 | - | 4.83 | 93,575 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,840 |
| Communist Countries in History | 0 | - | 4.63 | 492,298 |
| History of India | 0 | - | 4.61 | 21,272 |
| Countries that Bordered British India with an Empty Map | 0 | - | 4.68 | 55,150 |
| Countries of Africa | 0 | - | 5.00 | 2,506,193 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,582 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,428 |
| History of South Africa | 0 | - | 4.60 | 17,598 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,917 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| Australia Map Quiz | 0 | - | 4.94 | 342,361 |
| History of Mexico | 0 | - | 4.58 | 15,227 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,772 |
| Arms Exports - United States | 0 | - | 4.70 | 54,310 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,721 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 54,919 |
| Win the U.S. Presidential Election | 0 | - | 4.80 | 618,005 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,356 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,082 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,957 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,436 |
| U.S. President Scramble | 0 | - | 4.40 | 116,167 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,524 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,014 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,348 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,780 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,686 |
| The Kennedy Family | 0 | - | 3.90 | 14,022 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,443 |
| The American Civil War | 0 | - | 4.62 | 52,117 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,553 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,202 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,200 |
| Official European Union Languages | 0 | - | 4.97 | 236,442 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,649 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,475 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,184 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,012 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,268 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,920 |
| The French Revolution | 0 | - | 4.46 | 23,769 |
| History of France | 0 | - | 4.59 | 55,957 |
| French History Multiple Choice | 0 | - | 4.55 | 32,863 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,379 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,756 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,764 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 72,851 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,418 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,926 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,523 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,653 |
| Roman Names for Places | 0 | - | 4.62 | 57,851 |
| Byzantine History | 0 | - | 4.91 | 28,599 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,011 |
| Biggest Urban Areas in the UK | 0 | - | 4.42 | 175,756 |
| Biggest Cities in the Commonwealth of Nations | 0 | - | 4.61 | 65,303 |
| Biggest Cities in the UK | 0 | - | 4.48 | 104,101 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.57 | 34,191 |
