| Prime Ministers of the UK | 0 | - | 4.95 | 441,365 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,407 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,906 |
| Prime Ministers of Australia | 0 | - | 4.51 | 32,144 |
| Canadian Prime Ministers | 0 | - | 4.64 | 57,805 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 200,252 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,461 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,718 |
| Countries of the Popes | 0 | - | 4.79 | 128,558 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,718,771 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,351 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,128 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,382 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,478 |
| Arms Exports - Russia | 0 | - | 4.49 | 25,173 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,848 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,918 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,764 |
| National Founders | 0 | - | 4.40 | 83,934 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,961 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,064 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,599 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,432 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,117 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,124 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,334 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,747 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,065 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,093 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,197 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 83,834 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,339 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,410 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,914 |
| Pope Facts | 0 | - | 4.39 | 31,347 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,730 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,604 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,048 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,081 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,670 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,486 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,621 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,379 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,451 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,030 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,611 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,543 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,585 |
| UK Immigration by Country | 0 | - | 4.94 | 141,460 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,658 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,660 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,830 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,972 |
| Asian Countries with the Most Christians | 0 | - | 4.86 | 97,758 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 136,552 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,332 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,949 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 121,065 |
| Political Movements by Country | 0 | - | 4.46 | 72,708 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,096 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,130 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,578 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,852 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,569 |
| Every European Country Shape | 0 | - | 4.96 | 202,616 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,728 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,691 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,794 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,679 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,695 |
| Name that Greek Letter | 0 | - | 4.93 | 324,661 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,559 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,654 |
| Name the English Monarchs | 0 | - | 4.91 | 505,382 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,682 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,875 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,182 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,061 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,416 |
| Presidential Middle Names | 0 | - | 4.41 | 60,602 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,567 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,803 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,568 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,784 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,895 |
| Random European Flag to Country | 0 | - | 4.90 | 183,840 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,249 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,315 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,431 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,087 |
| The Trojan War | 0 | - | 4.83 | 39,930 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,669 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,125 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,478 |
| Roman Emperors | 0 | - | 4.95 | 120,882 |
| Monty Python Quotes | 0 | - | 4.89 | 42,581 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,031 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,415 |
| Scotland A-Z | 0 | - | 4.73 | 41,407 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 51,078 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,040 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,409 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,410 |
| Hindu Countries | 0 | - | 4.87 | 50,463 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,483 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,931 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,146 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,443 |
| The American Revolution | 0 | - | 4.52 | 54,326 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,041 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,289 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,704 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,686 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 320,045 |
| History of Russia Quiz | 0 | - | 4.47 | 31,985 |
| Russia by Picture | 0 | - | 4.41 | 20,462 |
| Flags of Countries That Border France | 0 | - | 4.89 | 123,618 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 97,706 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,962 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,781 |
| Ancient Greek Words | 0 | - | 4.93 | 112,239 |
| History of Italy | 0 | - | 4.55 | 32,107 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,192 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,042 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,781 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,379 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,619 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,039 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,095 |
| Animals in British History | 0 | - | 4.43 | 26,068 |
| 2026–2027 English Premier League Teams | 0 | - | 4.84 | 868,110 |
| The Vietnam War | 0 | - | 4.44 | 35,623 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,663 |
| History of South Africa | 0 | - | 4.60 | 17,742 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,203 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,553 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,888 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,775 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,328 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,717 |
| First Ladies of the United States | 0 | - | 4.28 | 85,862 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,028 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,281 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,384 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,312 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,062 |
| Europe Map Quiz | 0 | - | 5.00 | 4,780,626 |
| European Capitals with the Least Sunshine | 0 | - | 4.46 | 50,447 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,131 |
| Most Forested European Countries | 0 | - | 4.80 | 75,566 |
| European Countries with NO Wolves | 0 | - | 4.56 | 65,688 |
| European Cities with the Biggest Economies | 0 | - | 4.61 | 38,558 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,815 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,893 |
| Russia A-Z | 0 | - | 4.46 | 27,296 |
| History of Austria | 0 | - | 4.70 | 17,951 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,307 |
| Geography of the French Empire | 0 | - | 4.45 | 27,194 |
| The French Revolution | 0 | - | 4.47 | 24,108 |
| History of France | 0 | - | 4.61 | 57,463 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,542 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,505 |
| Mythology A-Z | 0 | - | 4.31 | 37,350 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,921 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,352 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 126,517 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,524 |
| The Vikings! | 0 | - | 4.46 | 28,391 |
| The Portuguese Empire | 0 | - | 4.58 | 12,095 |
| Arthurian Legend | 0 | - | 4.33 | 25,156 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,355 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,510 |
| British Monopoly Board - Map Quiz | 0 | - | 4.47 | 20,256 |
| Name the James Bond Movies | 0 | - | 4.56 | 159,195 |
| James Bond Trivia | 0 | - | 4.46 | 39,363 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 389,429 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,768 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,435 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,112 |
| Geography of the British Empire | 0 | - | 4.48 | 39,813 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.32 | 62,459 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,299 |
| History of Iran | 0 | - | 4.66 | 16,404 |
| The Iraq War | 0 | - | 4.47 | 15,691 |
| History of China | 0 | - | 4.35 | 57,466 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,478 |
| History of India | 0 | - | 4.62 | 21,488 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,036 |
| African Countries with the Most Muslims | 0 | - | 4.80 | 101,140 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,912 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 14,057 |
| Communist Countries in History | 0 | - | 4.63 | 497,469 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,307 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,875 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,252 |
| Australian Capitals | 0 | - | 4.92 | 62,804 |
| Australia A-Z | 0 | - | 4.54 | 50,101 |
| Australia Map Quiz | 0 | - | 4.95 | 345,760 |
| History of Mexico | 0 | - | 4.52 | 15,354 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,759 |
