| Name the English Monarchs | 0 | - | 4.92 | 497,477 |
| Monarchies of Europe | 0 | - | 4.90 | 97,228 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,805 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,313 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,265 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,008 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,927 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,149 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,487 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,180 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,046 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,720 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,122 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,137 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,154 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,714 |
| Geography of the British Empire | 0 | - | 4.48 | 39,464 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,649,629 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,143 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,061 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,055 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,880 |
| Prime Ministers of the UK | 0 | - | 4.96 | 434,188 |
| Canadian Prime Ministers | 0 | - | 4.63 | 56,980 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,771 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,105 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,367 |
| The Only European Country ... | 0 | - | 4.91 | 213,552 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,355 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,360 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,260 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,909 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,079 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,224,562 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,318,734 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,607 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,210 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,083 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,414 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,201 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,174 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,082 |
| Slavic Countries | 0 | - | 4.96 | 110,783 |
| Countries Closest to Spain A-Z | 0 | - | 4.99 | 107,623 |
| Counties of England | 0 | - | 4.97 | 788,480 |
| Countries Closest to the United Kingdom A-Z | 0 | - | 4.96 | 189,807 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,684 |
| British History A-Z #1 | 0 | - | 4.45 | 45,765 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,067 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,195 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 423,349 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,382 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 94,974 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,240 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,696 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,126 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,686 |
| European Countries with One Border | 0 | - | 4.97 | 181,489 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 177,997 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,490 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,112 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,020 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,573 |
| UK Cities Map Quiz | 0 | - | 4.95 | 461,948 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,852 |
| Counties of England Map Quiz | 0 | - | 4.97 | 305,965 |
| Monarchies of Asia | 0 | - | 4.97 | 70,545 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,386 |
| Communist Countries in History | 0 | - | 4.63 | 492,161 |
| Battle to Country | 0 | - | 4.91 | 52,451 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,644 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,615 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,102 |
| Countries That Border Russia | 0 | - | 4.98 | 458,613 |
| The Dictator Files: Vladimir Lenin | 0 | - | 4.45 | 26,616 |
| Countries Bordering France | 0 | - | 4.85 | 397,208 |
| History of France | 0 | - | 4.59 | 55,910 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,904 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,759 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,487 |
| English Royal Consorts | 0 | - | 4.37 | 37,142 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,589 |
| All UK Parliament Constituencies on a Map | 0 | - | 4.60 | 28,521 |
| Political Movements by Country | 0 | - | 4.46 | 72,234 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,733 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,307 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 90,995 |
| Prime Ministers of Australia | 0 | - | 4.50 | 31,645 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,017 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,717 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,273 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,940 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,375 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,061 |
| European Capital Superlatives - Top 2 | 0 | - | 4.94 | 80,616 |
| Russia Country Quiz | 0 | - | 4.85 | 113,574 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,798 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,003 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,083 |
| Germany Country Quiz | 0 | - | 4.82 | 156,421 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,072 |
| Italy Country Quiz | 0 | - | 4.82 | 122,093 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,265 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 150,996 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,915 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,879 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,533 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,685 |
| UK Immigration by Country | 0 | - | 4.94 | 139,505 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,000 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,068 |
| Medieval English History | 0 | - | 4.53 | 43,295 |
| Name the Popes Quiz | 0 | - | 4.47 | 136,974 |
| Countries of the Popes | 0 | - | 4.79 | 127,093 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,456 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,163 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,583 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,461 |
| National Founders | 0 | - | 4.40 | 83,624 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,134 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,052 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,870 |
| U.S. States by Governor | 0 | - | 4.43 | 17,975 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,562 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,663 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,531 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,080 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,757 |
| Most Guessed European Capitals | 0 | - | 4.87 | 101,158 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,785 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,735 |
| Countries that Border Poland | 0 | - | 4.99 | 171,233 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,338 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,204 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,627 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,587 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,519 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,660 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,361 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,673 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,477 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,760 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,079 |
| History of Germany | 0 | - | 4.39 | 52,593 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,312 |
| Name that Greek Letter | 0 | - | 4.94 | 321,460 |
| Counties of Ireland | 0 | - | 4.92 | 192,839 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,383 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,191 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,004 |
| Countries Closest to Spain | 0 | - | 4.96 | 225,157 |
| Countries that Visit the UK the Most | 0 | - | 4.87 | 74,171 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 128,457 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,937 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,816 |
| The Reign of Queen Elizabeth II | 0 | - | 4.35 | 35,660 |
| World Capitals Closest to London | 0 | - | 4.87 | 109,624 |
| 50 Busiest Air Routes from London | 0 | - | 4.86 | 95,713 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 396,767 |
| Malta Country Quiz | 0 | - | 4.81 | 30,795 |
| Countries with the Most Hindus | 0 | - | 4.90 | 122,229 |
| Hindu Countries | 0 | - | 4.85 | 49,455 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,369 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,896 |
| The U.S. Government - How Does it Work? | 0 | - | 4.34 | 42,140 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,701 |
| The American Civil War | 0 | - | 4.62 | 52,103 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,791 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,569 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,515 |
| European Cities Beginning with B - Click Map | 0 | - | 4.75 | 77,266 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,111 |
| Random European Flag to Country | 0 | - | 4.89 | 180,764 |
| History of Russia Quiz | 0 | - | 4.49 | 31,774 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,382 |
| Biggest Trading Partners - Russia | 0 | - | 4.55 | 36,314 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,799 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,843 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,430 |
| Germany A-Z | 0 | - | 4.56 | 62,282 |
| Biggest Trading Partners - Germany | 0 | - | 4.97 | 70,700 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,271 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,382 |
| History of Italy | 0 | - | 4.55 | 31,800 |
| Italy A-Z | 0 | - | 4.49 | 57,637 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,812 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,987 |
| Roman Emperors | 0 | - | 4.95 | 118,325 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,466 |
| Countries Closest to Iceland | 0 | - | 4.89 | 72,767 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,291 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,608 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,963 |
| Biggest Trading Partners - Spain | 0 | - | 4.91 | 53,482 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,406 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,770 |
| Monty Python Quotes | 0 | - | 4.88 | 42,306 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,102 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,597 |
