| Countries of the Soviet Union | 0 | - | 4.98 | 193,731 |
| Soviet Leaders 1917–1991 | 0 | - | 4.43 | 94,374 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,619 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,391 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,602 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,244 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,194 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,247 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,822 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,327 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,279 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,018 |
| Arms Exports - Russia | 0 | - | 4.48 | 24,756 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,650,169 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,134 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,152 |
| Name the English Monarchs | 0 | - | 4.92 | 497,541 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,827 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,496 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,069 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,058 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,895 |
| The Dictator Files: Joseph Stalin | 0 | - | 4.37 | 48,267 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,540 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,654 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,408 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,991 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,709 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,919 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,628 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,483 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,815 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,403 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,667 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,798 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,224,821 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,135 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,318,814 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,395 |
| The Only European Country ... | 0 | - | 4.91 | 213,580 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,378 |
| Flags of Countries That Border Russia | 0 | - | 4.70 | 70,134 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,495 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,652 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,571 |
| Counties of England | 0 | - | 4.97 | 788,557 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,362 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,221 |
| The American Revolution | 0 | - | 4.52 | 54,040 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,621 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,219 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,978 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,125 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,258 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,421 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,716 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,723 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,712 |
| Monarchies of Europe | 0 | - | 4.90 | 97,239 |
| European Countries with One Border | 0 | - | 4.97 | 181,508 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,036 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,213 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,184 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,092 |
| Slavic Countries | 0 | - | 4.96 | 110,793 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,126 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,028 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,594 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,910 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,977 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,862 |
| Counties of England Map Quiz | 0 | - | 4.97 | 305,985 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,157 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,719 |
| Geography of the British Empire | 0 | - | 4.48 | 39,464 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,809 |
| Name the Popes Quiz | 0 | - | 4.47 | 136,997 |
| Countries of the Popes | 0 | - | 4.79 | 127,108 |
| The Vietnam War | 0 | - | 4.43 | 35,280 |
| Country by Photo of its Leader | 0 | - | 4.74 | 123,177 |
| Political Movements by Country | 0 | - | 4.46 | 72,235 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,746 |
| African Countries with the Most Christians | 0 | - | 4.94 | 74,807 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,139 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,314 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,717 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,872 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,494 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,366 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,666 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,160 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,185 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,055 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,761 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,161 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,791 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,412 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,084 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,624 |
| Countries that Border Poland | 0 | - | 4.99 | 171,253 |
| Russia Country Quiz | 0 | - | 4.85 | 113,584 |
| Countries That Border Russia | 0 | - | 4.98 | 458,652 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,344 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,241 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,803 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,634 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,004 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,671 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,694 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,088 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,488 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,766 |
| Countries Bordering France | 0 | - | 4.85 | 397,621 |
| Germany Country Quiz | 0 | - | 4.82 | 156,436 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,074 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,801 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,493 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,100 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,392 |
| Name that Greek Letter | 0 | - | 4.94 | 321,480 |
| Counties of Ireland | 0 | - | 4.92 | 192,865 |
| Italy Country Quiz | 0 | - | 4.82 | 122,110 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,276 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,001 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,394 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,198 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,889 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,548 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,696 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,004 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,171 |
| UK Immigration by Country | 0 | - | 4.94 | 139,518 |
| Arthurian Legend | 0 | - | 4.33 | 25,047 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,017 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 74,182 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,477 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,262 |
| Medieval English History | 0 | - | 4.53 | 43,295 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,941 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,817 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,635 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,718 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 396,810 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 96,099 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,178 |
| The Iraq War | 0 | - | 4.47 | 15,543 |
| Paramount Leaders of China | 0 | - | 4.36 | 10,989 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,241 |
| Hindu Countries | 0 | - | 4.85 | 49,469 |
| Biggest Trading Partners – Australia | 0 | - | 4.93 | 60,907 |
| Arms Exports - United States | 0 | - | 4.70 | 54,290 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,796 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,875 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,391 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,937 |
| Presidential Middle Names | 0 | - | 4.41 | 59,651 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,686 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,764 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,149 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,081 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,106 |
| Random European Flag to Country | 0 | - | 4.89 | 180,785 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,397 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,317 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,809 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,854 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,588 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,521 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,362 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,444 |
| Germany A-Z | 0 | - | 4.56 | 62,287 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,286 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,226 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,408 |
| Italy A-Z | 0 | - | 4.49 | 57,645 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,822 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,996 |
| Roman Emperors | 0 | - | 4.95 | 118,347 |
| Countries Closest to Iceland | 0 | - | 4.89 | 72,776 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,297 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,612 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,412 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,782 |
| Biggest Trading Partners – United Kingdom | 0 | - | 4.92 | 79,439 |
| Monty Python Quotes | 0 | - | 4.88 | 42,308 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 491,234 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,685 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,104 |
| British History A-Z #1 | 0 | - | 4.45 | 45,772 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,068 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,289 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,046 |
| History of Scotland | 0 | - | 4.51 | 20,993 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,913 |
| Top 4 in English Football, 1888–2025 | 0 | - | 4.92 | 138,955 |
| 2025–2026 English Premier League Teams | 0 | - | 4.86 | 850,572 |
| Scotland A-Z | 0 | - | 4.73 | 41,018 |
| Malta Country Quiz | 0 | - | 4.81 | 30,797 |
| Biggest Trading Partners - China | 0 | - | 4.95 | 74,646 |
