| Countries Invaded by the USSR | 0 | - | 4.29 | 94,140 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,859 |
| Name the English Monarchs | 0 | - | 4.91 | 503,734 |
| Monarchies of Europe | 0 | - | 4.90 | 98,320 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,684 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,169 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,034 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,279 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,102 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,928 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,706,738 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,275 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,205 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,041 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 199,745 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,546 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,932 |
| Communist Countries in History | 0 | - | 4.63 | 496,398 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,027 |
| Europe Map Quiz | 0 | - | 5.00 | 4,769,604 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 149,963 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,931 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,326 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,402 |
| Prime Ministers of the UK | 0 | - | 4.95 | 439,904 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,612 |
| Russia A-Z | 0 | - | 4.46 | 27,264 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,611 |
| Soviet Leaders 1917–1991 | 0 | - | 4.44 | 95,173 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,460 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,312 |
| Countries in World War I | 0 | - | 4.88 | 228,415 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,954 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,229 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,483 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,951 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,620 |
| The Only European Country ... | 0 | - | 4.91 | 217,288 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,510 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,396 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 191,072 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,838 |
| British History A-Z #1 | 0 | - | 4.45 | 46,568 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,748 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,518 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,438 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,247,813 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,330,436 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,880 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,394 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,275 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,334 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,574 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,521 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,363 |
| Slavic Countries | 0 | - | 4.96 | 111,851 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,771 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,367 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,166 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,043 |
| Counties of England | 0 | - | 4.97 | 798,553 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,943 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,621 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,056 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 120,776 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,557 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,996 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,350 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,709 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,028 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,018 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,801 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,646 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,350 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,961 |
| European Countries with One Border | 0 | - | 4.97 | 183,067 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,849 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,813 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,545 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,857 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,988 |
| European Capital Superlatives - Top 2 | 0 | - | 4.95 | 81,279 |
| Russia Country Quiz | 0 | - | 4.83 | 114,667 |
| Countries That Border Russia | 0 | - | 4.98 | 462,701 |
| Arms Exports - Russia | 0 | - | 4.49 | 25,148 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,448 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,060 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,405 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,756 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,755 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,078 |
| Countries Bordering France | 0 | - | 4.83 | 403,424 |
| Germany Country Quiz | 0 | - | 4.83 | 158,131 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,101 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,575 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,522 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,616 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,272 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,402 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,085 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,107 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,224 |
| UK Immigration by Country | 0 | - | 4.94 | 141,118 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,117 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,121 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,091 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,398 |
| English Royal Consorts | 0 | - | 4.38 | 37,401 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,638 |
| Geography of the British Empire | 0 | - | 4.48 | 39,733 |
| Medieval English History | 0 | - | 4.53 | 43,563 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,881 |
| Name the Popes Quiz | 0 | - | 4.47 | 138,394 |
| Countries of the Popes | 0 | - | 4.79 | 128,303 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,076 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.87 | 135,341 |
| Monarchies of Asia | 0 | - | 4.97 | 71,194 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,301 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,046 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,993 |
| Countries in World War II | 0 | - | 4.54 | 914,454 |
| Political Movements by Country | 0 | - | 4.46 | 72,607 |
| Battle to Country | 0 | - | 4.91 | 53,494 |
| Hindu Countries | 0 | - | 4.86 | 50,279 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 76,403 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,361 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,101 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,829 |
| The American Civil War | 0 | - | 4.62 | 52,485 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,175 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,582 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,492 |
| Countries that Border Poland | 0 | - | 4.99 | 172,564 |
| Russia by Picture | 0 | - | 4.41 | 20,427 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,961 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,020 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,392 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,630 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,630 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,043 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,953 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,266 |
| Germany A-Z | 0 | - | 4.56 | 62,687 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,692 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 97,249 |
| The Trojan War | 0 | - | 4.83 | 39,787 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,641 |
| Name that Greek Letter | 0 | - | 4.93 | 324,108 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,170 |
| Counties of Ireland | 0 | - | 4.92 | 195,923 |
| Italy A-Z | 0 | - | 4.49 | 58,410 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,004 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,627 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,292 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,636 |
| Roman Emperors | 0 | - | 4.95 | 120,334 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,715 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,482 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,213 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,309 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,047 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 75,331 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,702 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,195 |
| Monty Python Quotes | 0 | - | 4.89 | 42,500 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,789 |
| English First Names of the Middle Ages | 0 | - | 4.47 | 60,772 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,200 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,995 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,728 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,525 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,872 |
| The Life of Winston Churchill | 0 | - | 4.16 | 11,851 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,779 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,973 |
| 2025–2026 Football League Teams | 0 | - | 4.94 | 402,536 |
| National Founders | 0 | - | 4.40 | 83,871 |
| Important Cities in WWII | 0 | - | 4.42 | 93,586 |
| Countries with the Most Hindus | 0 | - | 4.90 | 123,181 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,245 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,393 |
| Names of Generations | 0 | - | 4.09 | 45,153 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,323 |
| U.S. States by Governor | 0 | - | 4.43 | 18,078 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,714 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,392 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,705 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,903 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,678 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,967 |
| Presidential Middle Names | 0 | - | 4.41 | 60,384 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,438 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,655 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,042 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,474 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,115 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,252 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,889 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,982 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,262 |
