| Countries of the Soviet Union | 0 | - | 4.98 | 195,194 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,259 |
| Prime Ministers of the UK | 0 | - | 4.95 | 440,593 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,913 |
| Prime Ministers of Australia | 0 | - | 4.50 | 32,066 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,709 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,871 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,711,563 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,950 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,854 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,968 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,140 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 150,111 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 73,002 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,579 |
| Country by Photo of its Leader | 0 | - | 4.70 | 124,332 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,289 |
| Arms Exports - Russia | 0 | - | 4.49 | 25,160 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 71,731 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,513 |
| Biggest Trading Partners - Spain | 0 | - | 4.92 | 53,871 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.93 | 80,604 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,214 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,536 |
| Countries of the Popes | 0 | - | 4.79 | 128,416 |
| National Founders | 0 | - | 4.40 | 83,897 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,502 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,758 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,538 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 83,524 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,316 |
| Paramount Leaders of China | 0 | - | 4.36 | 11,105 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,409 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,825 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,784 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,854 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,879 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,216 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,422 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,223 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,249 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,442 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,343 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,929 |
| The Dictator Files: Chairman Mao | 0 | - | 4.28 | 20,716 |
| Political Movements by Country | 0 | - | 4.46 | 72,651 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,056 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,116 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,970 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,563 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,837 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,349 |
| Every European Country Shape | 0 | - | 4.96 | 202,349 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,651 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,513 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,345 |
| Biggest Cities in Russia | 0 | - | 4.49 | 82,583 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,203 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,577 |
| Name that Greek Letter | 0 | - | 4.93 | 324,325 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,460 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,367 |
| UK Immigration by Country | 0 | - | 4.94 | 141,243 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,333 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,472 |
| Name the English Monarchs | 0 | - | 4.91 | 504,467 |
| Pope Facts | 0 | - | 4.39 | 31,314 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,584 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 135,904 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,158 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,814 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,507 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,881 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 61,749 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,996 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,802 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,183 |
| Presidential Middle Names | 0 | - | 4.41 | 60,468 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,483 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,693 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,507 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,500 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,629 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,621 |
| Random European Flag to Country | 0 | - | 4.89 | 183,115 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,729 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,566 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,182 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,046 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,223 |
| The Trojan War | 0 | - | 4.83 | 39,842 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,387 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,705 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,944 |
| Roman Emperors | 0 | - | 4.95 | 120,518 |
| Monty Python Quotes | 0 | - | 4.89 | 42,520 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,813 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,633 |
| 2025–2026 English Premier League Teams | 0 | - | 4.85 | 862,712 |
| Scotland A-Z | 0 | - | 4.73 | 41,355 |
| Biggest Trading Partners - Turkey | 0 | - | 4.81 | 50,947 |
| Prime Ministers of Israel | 0 | - | 3.97 | 18,011 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 75,321 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,262 |
| Hindu Countries | 0 | - | 4.86 | 50,343 |
| Flags of WW1 | 0 | - | 4.60 | 38,531 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,425 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,587 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,298 |
| First Ladies of the United States | 0 | - | 4.28 | 85,780 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,253 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,298 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,582 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,074 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,250 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,264 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,013 |
| The American Revolution | 0 | - | 4.52 | 54,297 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,600 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,756 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,865 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,952 |
| Random European Countries on a Map | 0 | - | 4.97 | 284,435 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 319,569 |
| History of Russia Quiz | 0 | - | 4.47 | 31,968 |
| Flags of Countries That Border France | 0 | - | 4.88 | 123,463 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 97,567 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,418 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,731 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,722 |
| Ancient Greek Words | 0 | - | 4.93 | 112,033 |
| History of Italy | 0 | - | 4.55 | 32,082 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,058 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 126,301 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,345 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,744 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,320 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,472 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,990 |
| British Monopoly Board - Map Quiz | 0 | - | 4.47 | 20,247 |
| Shakespeare's Plays Quiz | 0 | - | 4.37 | 388,956 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,739 |
| Tolkien's Middle Earth Map Quiz | 0 | - | 4.92 | 38,013 |
| Top 100 UK Baby Girls' Names in 1850 | 0 | - | 4.35 | 62,332 |
| Animals in British History | 0 | - | 4.43 | 26,049 |
| People in Pictures with Queen Elizabeth II | 0 | - | 4.38 | 29,365 |
| Countries "Ruled" by King Charles III | 0 | - | 4.78 | 82,798 |
| The Vietnam War | 0 | - | 4.44 | 35,591 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 54,583 |
| Communist Countries in History | 0 | - | 4.63 | 496,851 |
| History of South Africa | 0 | - | 4.60 | 17,728 |
| American Political Words | 0 | - | 4.39 | 23,439 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,184 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,541 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,876 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,551 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,218 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,987 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,781 |
| U.S. President Scramble | 0 | - | 4.40 | 117,165 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,241 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,967 |
| Biggest European Cities by Letter | 0 | - | 4.55 | 126,830 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,235 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,920 |
| European Capitals with the Least Sunshine | 0 | - | 4.46 | 50,411 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,077 |
| Most Forested European Countries | 0 | - | 4.80 | 75,490 |
| European Countries with NO Wolves | 0 | - | 4.56 | 65,671 |
| European Cities with the Biggest Economies | 0 | - | 4.61 | 38,510 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,620 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,962 |
| History of Austria | 0 | - | 4.70 | 17,923 |
| Biggest French Empire Countries | 0 | - | 4.49 | 65,258 |
| Geography of the French Empire | 0 | - | 4.45 | 27,167 |
| The French Revolution | 0 | - | 4.47 | 24,076 |
| History of France | 0 | - | 4.61 | 57,342 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,086 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,111 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,968 |
| Mythology A-Z | 0 | - | 4.31 | 37,310 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,865 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,938 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,301 |
| Byzantine History | 0 | - | 4.91 | 28,939 |
| Byzantine Emperors | 0 | - | 4.92 | 14,412 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,317 |
| The Vikings! | 0 | - | 4.46 | 28,374 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| Arthurian Legend | 0 | - | 4.33 | 25,136 |
| Biggest British Empire Countries | 0 | - | 4.74 | 100,246 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,450 |
| Top 100 UK Baby Boys' Names in 1850 | 0 | - | 4.42 | 70,048 |
| Most-Visited Countries by the British | 0 | - | 4.64 | 68,808 |
| Name the James Bond Movies | 0 | - | 4.56 | 158,985 |
| James Bond Trivia | 0 | - | 4.46 | 39,330 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,424 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,969 |
| Geography of the British Empire | 0 | - | 4.48 | 39,767 |
| Medieval English History | 0 | - | 4.53 | 43,589 |
