| Countries of the Soviet Union | 0 | - | 4.98 | 184,963 |
| Soviet Leaders 1917–1991 | 0 | - | 4.42 | 87,445 |
| English Monarchs Quiz | 0 | - | 4.91 | 447,659 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 87,488 |
| Monarchies of Europe | 0 | - | 4.88 | 87,104 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 133,867 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 62,946 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.93 | 49,416 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 58,849 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 100,209 |
| Countries of the Popes | 0 | - | 4.85 | 109,367 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,660 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,175,377 |
| Top 10 Coldest European Countries | 0 | - | 4.95 | 180,916 |
| Top 10 Hottest European Countries | 0 | - | 4.87 | 115,642 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 179,039 |
| Communist Countries in History | 0 | - | 4.63 | 455,866 |
| Prime Ministers of the UK | 0 | - | 4.95 | 381,695 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 158,261 |
| Europe Map Quiz | 0 | - | 5.00 | 4,298,822 |
| Top 10 Richest Countries in Europe | 0 | - | 4.88 | 135,418 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 64,927 |
| Category Elimination - European Countries #1 | 0 | - | 4.87 | 76,789 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.82 | 9,928 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.92 | 46,491 |
| Canadian Prime Ministers Quiz | 0 | - | 4.64 | 49,707 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 208,403 |
| Countries in World War I | 0 | - | 4.88 | 209,836 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 99,996 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 177,419 |
| British History A-Z | 0 | - | 4.47 | 39,549 |
| Houses of British Monarchs | 0 | - | 4.50 | 52,153 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 394,813 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 353,349 |
| Countries That Use the Euro | 0 | - | 4.92 | 63,290 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 336,118 |
| 10 Easternmost Countries in Europe | 0 | - | 4.85 | 92,532 |
| The Only European Country ... | 0 | - | 4.94 | 178,890 |
| European Secessionist Movements on a Map | 0 | - | 4.51 | 31,464 |
| UK Cities Map Quiz | 0 | - | 4.94 | 433,639 |
| Counties of England | 0 | - | 4.96 | 691,563 |
| Invasions of Great Britain | 0 | - | 4.49 | 55,641 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.55 | 13,800 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 167,334 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,046,303 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.93 | 1,186,828 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 160,644 |
| 10 Westernmost Countries in Europe | 0 | - | 4.95 | 138,503 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.94 | 186,695 |
| European Landmarks Map Quiz | 0 | - | 4.98 | 77,072 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 49,745 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 74,875 |
| Eastern Europe Map Quiz | 0 | - | 4.89 | 115,817 |
| Slavic Countries | 0 | - | 4.96 | 100,654 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 64,813 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 21,931 |
| Spain Cities Map Quiz | 0 | - | 4.86 | 86,352 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 169,435 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 93,714 |
| UK Immigration by Country | 0 | - | 4.95 | 125,370 |
| United Kingdom Country Quiz | 0 | - | 4.94 | 118,974 |
| Parts of the United Kingdom | 0 | - | 4.88 | 83,955 |
| Counties of England Map Quiz | 0 | - | 4.97 | 287,129 |
| Wives of King Henry VIII | 0 | - | 4.53 | 44,646 |
| English Royal Consorts | 0 | - | 4.27 | 34,563 |
| Countries the UK Declared War On | 0 | - | 4.58 | 112,412 |
| Geography of the British Empire | 0 | - | 4.50 | 37,067 |
| The Reign of Queen Elizabeth I | 0 | - | 4.50 | 29,660 |
| Medieval English History | 0 | - | 4.52 | 40,825 |
| Name the Popes Quiz | 0 | - | 4.46 | 121,163 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 116,510 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.88 | 101,900 |
| Monarchies of Asia | 0 | - | 4.95 | 54,093 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.90 | 92,976 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 82,366 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 93,718 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 109,668 |
| Category Elimination - African Geography #1 | 0 | - | 4.89 | 79,752 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 81,493 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 222,242 |
| U.S. Federal Agency Acronyms | 0 | - | 4.51 | 75,929 |
| European Diaspora - Top 11 Countries | 0 | - | 4.91 | 83,958 |
| 10 European Countries with the Most Tourists | 0 | - | 4.97 | 120,998 |
| Three Band Flags of Europe | 0 | - | 4.97 | 161,256 |
| Catholic Countries in Europe | 0 | - | 4.87 | 83,836 |
| Most Forested European Countries | 0 | - | 4.82 | 68,307 |
| Pixelated Europe Map | 0 | - | 4.90 | 109,596 |
| European Countries with One Border | 0 | - | 4.96 | 150,676 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 144,582 |
| Category Elimination - European Geography #1 | 0 | - | 4.97 | 201,174 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 143,088 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 189,339 |
| Name a Valid European Country #2 | 0 | - | 4.93 | 84,463 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 61,733 |
| Russia Country Quiz | 0 | - | 4.84 | 103,333 |
| Russia A-Z | 0 | - | 4.45 | 25,817 |
| Countries That Border Russia | 0 | - | 4.98 | 426,342 |
| Arms Exports - Russia | 0 | - | 4.47 | 23,358 |
| Croatia Country Quiz | 0 | - | 4.81 | 37,329 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 102,173 |
| Regions of France Map Quiz | 0 | - | 4.96 | 127,563 |
| France Cities Map Quiz | 0 | - | 4.95 | 148,155 |
| Countries Bordering France | 0 | - | 4.87 | 357,632 |
| Germany Country Quiz | 0 | - | 4.82 | 140,507 |
| States of Germany Map Quiz | 0 | - | 4.91 | 120,329 |
| Germany Cities Map Quiz | 0 | - | 4.84 | 106,140 |
| Countries Bordering Germany | 0 | - | 4.99 | 340,954 |
| States of the German Confederation in 1848 | 0 | - | 4.83 | 26,577 |
| Italy Country Quiz | 0 | - | 4.81 | 109,108 |
| Regions of Italy Map Quiz | 0 | - | 4.95 | 133,885 |
| Italy Cities Map Quiz | 0 | - | 4.96 | 127,602 |
| Countries Italy Declared War On | 0 | - | 4.79 | 39,984 |
| Countries in World War II | 0 | - | 4.66 | 812,356 |
| Political Movements by Country | 0 | - | 4.46 | 68,576 |
| Battle to Country | 0 | - | 4.92 | 35,537 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 71,766 |
| Roman Emperors | 0 | - | 4.95 | 96,054 |
| Greenland Country Quiz | 0 | - | 4.81 | 32,407 |
| Countries Closest to Iceland | 0 | - | 4.87 | 62,892 |
| Countries that Beat Portugal | 0 | - | 4.84 | 35,706 |
| Geography of the Spanish Empire | 0 | - | 4.48 | 35,246 |
| Countries Closest to Spain | 0 | - | 4.95 | 206,119 |
| Countries that Beat Spain | 0 | - | 4.95 | 55,894 |
| Countries that Visit the UK the Most | 0 | - | 4.85 | 62,748 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 90,338 |
| Counties of the UK and Ireland | 0 | - | 4.97 | 104,292 |
| Monty Python Quotes | 0 | - | 4.89 | 40,426 |
| The Reign of Henry VIII | 0 | - | 4.24 | 26,299 |
| English First Names of the Middle Ages | 0 | - | 4.41 | 45,449 |
| British History Multiple Choice #1 | 0 | - | 4.47 | 51,577 |
| British History Quiz for Dummies | 0 | - | 4.54 | 61,683 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.29 | 23,367 |
| The Reign of Queen Elizabeth II | 0 | - | 4.38 | 33,764 |
| The Life of Winston Churchill | 0 | - | 4.10 | 11,343 |
| World Capitals Closest to London | 0 | - | 4.90 | 93,469 |
| 50 Busiest Air Routes from London | 0 | - | 4.89 | 86,074 |
| 2025 Football League Teams | 0 | - | 4.94 | 345,688 |
| Pope Facts | 0 | - | 4.41 | 27,270 |
| Top 10 Richest Countries in Asia | 0 | - | 4.87 | 81,179 |
| Top 10 Richest Countries in Africa | 0 | - | 4.87 | 67,866 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.88 | 68,342 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,330 |
| The American Civil War | 0 | - | 4.72 | 49,069 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 66,192 |
| Most Guessed European Capitals | 0 | - | 4.89 | 96,498 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 128,286 |
| Countries that Border Poland | 0 | - | 4.99 | 158,716 |
| Countries that Bordered the USSR | 0 | - | 4.95 | 152,953 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.94 | 76,010 |
| Biggest Trading Partners - Russia | 0 | - | 4.56 | 34,024 |
| Countries With the Most Russian Speakers | 0 | - | 4.95 | 56,347 |
| Countries that Border Hungary | 0 | - | 4.98 | 96,283 |
| Countries Bordering Serbia | 0 | - | 4.95 | 83,179 |
| Countries Bordering Austria | 0 | - | 4.97 | 110,106 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 88,960 |
| Countries that Visit France the Most | 0 | - | 4.84 | 39,966 |
| Countries Closest to Metropolitan France | 0 | - | 4.87 | 66,326 |
| Germany A-Z | 0 | - | 4.65 | 49,889 |
| Countries that Beat Germany | 0 | - | 4.87 | 70,338 |
| Countries With the Most German Speakers | 0 | - | 4.88 | 52,205 |
| The Trojan War | 0 | - | 4.81 | 35,976 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 584,942 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.81 | 85,588 |
| Italy A-Z | 0 | - | 4.43 | 40,622 |
| Countries Bordering Italy | 0 | - | 4.92 | 78,818 |
| Countries that Beat Italy | 0 | - | 4.88 | 45,434 |
| Countries Closest to Italy | 0 | - | 4.97 | 179,222 |
| National Founders | 0 | - | 4.38 | 79,659 |
| Important Cities in WWII | 0 | - | 4.48 | 83,416 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 82,106 |
| Biggest Trading Partners - Spain | 0 | - | 4.90 | 50,319 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 463,931 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 24,777 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.76 | 19,001 |
| History of Scotland | 0 | - | 4.49 | 19,651 |
| The Reign of Queen Victoria | 0 | - | 4.33 | 22,224 |
| Top 4 in English Football, 1888–2024 | 0 | - | 4.95 | 107,772 |
| 2025 English Premier League Teams | 0 | - | 4.85 | 742,267 |
| Scotland A-Z | 0 | - | 4.75 | 37,774 |
| Biggest Trading Partners - Turkey | 0 | - | 4.82 | 44,995 |
| Countries Closest to Israel | 0 | - | 4.88 | 98,746 |
| Countries with the Most Hindus | 0 | - | 4.92 | 113,320 |
| Biggest Trading Partners - South Africa | 0 | - | 4.82 | 37,593 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.96 | 22,911 |
| Prime Ministers of Australia | 0 | - | 4.48 | 27,890 |
| Biggest Trading Partners - Colombia | 0 | - | 4.89 | 35,543 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 107,484 |
| U.S. States by Governor Quiz | 0 | - | 4.42 | 16,957 |
| U.S. Political Parties in History | 0 | - | 4.42 | 26,180 |
| American Political Words | 0 | - | 4.41 | 22,324 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,365 |
| The U.S. Government - How Does it Work? | 0 | - | 4.32 | 39,874 |
| U.S. Government Agencies | 0 | - | 4.41 | 17,687 |
| U.S. Vice Presidents | 0 | - | 4.42 | 119,702 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 97,048 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.56 | 81,687 |
| U.S. Presidential Trivia #2 | 0 | - | 4.51 | 39,792 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,114 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,562 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 41,303 |
