| Countries of the Soviet Union | 0 | - | 4.98 | 195,419 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,433 |
| Prime Ministers of the UK | 0 | - | 4.95 | 441,601 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,913 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,058 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,160 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,829 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,126 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,152 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,237 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,720,052 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,708 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,373 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,189 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,523 |
| Arms Exports - Russia | 0 | - | 4.49 | 25,177 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,617 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,893 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,937 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,821 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,774 |
| Countries of the Popes | 0 | - | 4.79 | 128,595 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,519 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,082 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,248 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,432 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,504 |
| National Founders | 0 | - | 4.40 | 83,937 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,447 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,773 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,136 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 83,893 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,364 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,550 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,119 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,736 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,497 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,643 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,105 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,132 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,054 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,140 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,863 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,553 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,671 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,428 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,475 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,574 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,652 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,035 |
| UK Immigration by Country | 0 | - | 4.94 | 141,516 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,740 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,735 |
| Name the English Monarchs | 0 | - | 4.91 | 505,600 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,987 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,800 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,737 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,366 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,981 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,140 |
| Political Movements by Country | 0 | - | 4.46 | 72,713 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,911 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,583 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,599 |
| Every European Country Shape | 0 | - | 4.96 | 202,678 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,843 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,750 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,963 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,850 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,704 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,308 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,608 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,343 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,490 |
| The Trojan War | 0 | - | 4.83 | 39,942 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,920 |
| Name that Greek Letter | 0 | - | 4.93 | 324,736 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,732 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,507 |
| Roman Emperors | 0 | - | 4.95 | 120,960 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,700 |
| Monty Python Quotes | 0 | - | 4.89 | 42,585 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,087 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,645 |
| Pope Facts | 0 | - | 4.39 | 31,353 |
| Hindu Countries | 0 | - | 4.87 | 50,496 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,801 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,500 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,235 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,151 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,487 |
| Presidential Middle Names | 0 | - | 4.41 | 60,637 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,582 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,983 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,839 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,166 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,592 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,478 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 53,720 |
| The American Revolution | 0 | - | 4.52 | 54,329 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,119 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,344 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,702 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,765 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,154 |
| Random European Flag to Country | 0 | - | 4.90 | 183,929 |
| Flags of Countries That Border France | 0 | - | 4.89 | 123,651 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,096 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 97,738 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,161 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,797 |
| Ancient Greek Words | 0 | - | 4.93 | 112,289 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,217 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,212 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,220 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,656 |
| British Monopoly Board - Map Quiz | 0 | - | 4.47 | 20,258 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 389,565 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,778 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,123 |
| Animals in British History | 0 | - | 4.43 | 26,072 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,835 |
| 2026–2027 English Premier League Teams | 0 | - | 4.84 | 869,082 |
| Scotland A-Z | 0 | - | 4.73 | 41,415 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 51,107 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,044 |
| The Vietnam War | 0 | - | 4.44 | 35,628 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,439 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,456 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,078 |
| Flags of WW1 | 0 | - | 4.60 | 38,621 |
| American Political Words | 0 | - | 4.39 | 23,456 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,208 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,556 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,891 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,819 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,343 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,738 |
| First Ladies of the United States | 0 | - | 4.28 | 85,896 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,041 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,291 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,405 |
| U.S. President Scramble | 0 | - | 4.40 | 117,366 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,328 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,072 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,308 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,053 |
| Europe Map Quiz | 0 | - | 5.00 | 4,781,931 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,933 |
| European Capitals with the Least Sunshine | 0 | - | 4.46 | 50,459 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,145 |
| Most Forested European Countries | 0 | - | 4.80 | 75,603 |
| European Countries with NO Wolves | 0 | - | 4.56 | 65,692 |
| European Cities with the Biggest Economies | 0 | - | 4.61 | 38,571 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,870 |
| History of Russia Quiz | 0 | - | 4.47 | 31,988 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,320 |
| History of France | 0 | - | 4.61 | 57,500 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,522 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,397 |
| Mythology A-Z | 0 | - | 4.31 | 37,360 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,934 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,469 |
| History of Italy | 0 | - | 4.55 | 32,117 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 126,569 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,397 |
| Byzantine History | 0 | - | 4.91 | 28,997 |
| Byzantine Emperors | 0 | - | 4.93 | 14,525 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,557 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,790 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,399 |
| Arthurian Legend | 0 | - | 4.33 | 25,161 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,053 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,384 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,522 |
| Name the James Bond Movies | 0 | - | 4.56 | 159,253 |
| James Bond Trivia | 0 | - | 4.46 | 39,373 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,440 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,143 |
| Geography of the British Empire | 0 | - | 4.48 | 39,822 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,489 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,430 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,865 |
| The Iraq War | 0 | - | 4.47 | 15,696 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,686 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 101,155 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,925 |
| Communist Countries in History | 0 | - | 4.63 | 497,603 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,311 |
| History of South Africa | 0 | - | 4.60 | 17,745 |
| Biggest Trading Partners - South Africa | 0 | - | 4.74 | 40,404 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,246 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,320 |
| Australian Capitals | 0 | - | 4.92 | 62,811 |
| Australia A-Z | 0 | - | 4.54 | 50,110 |
| Australia Map Quiz | 0 | - | 4.95 | 345,863 |
| Flags of North and South America | 0 | - | 4.99 | 376,092 |
| History of Mexico | 0 | - | 4.52 | 15,358 |
| South America Map Quiz | 0 | - | 5.00 | 1,554,633 |
