| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,820 |
| Counties of England | 0 | - | 4.97 | 793,632 |
| History of Italy | 0 | - | 4.55 | 31,918 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,595 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,135 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,765 |
| Europe Map Quiz | 0 | - | 5.00 | 4,750,310 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,698 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,986 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,120 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,594 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,483 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,971 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,364 |
| States of Germany | 0 | - | 4.96 | 151,491 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,736 |
| Regions of Italy | 0 | - | 4.92 | 75,376 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,326 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,406 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,866 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,451 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,642 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,347 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,969 |
| History of Austria | 0 | - | 4.70 | 17,820 |
| Geography of the French Empire | 0 | - | 4.45 | 27,013 |
| The French Revolution | 0 | - | 4.46 | 23,883 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,448 |
| The Portuguese Empire | 0 | - | 4.58 | 12,040 |
| Name the English Monarchs | 0 | - | 4.91 | 500,780 |
| History of France | 0 | - | 4.59 | 56,717 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,285 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,201 |
| Geography of the British Empire | 0 | - | 4.48 | 39,612 |
| Malta Country Quiz | 0 | - | 4.81 | 30,969 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,219 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,623 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,559 |
| The Only European Country ... | 0 | - | 4.91 | 215,575 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,527 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,357 |
| Name that Greek Letter | 0 | - | 4.93 | 322,844 |
| History of The Netherlands | 0 | - | 4.46 | 17,383 |
| History of Russia Quiz | 0 | - | 4.49 | 31,863 |
| The Trojan War | 0 | - | 4.83 | 39,611 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,366 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,358 |
| Roman Emperors | 0 | - | 4.95 | 119,499 |
| Countries Closest to Iceland | 0 | - | 4.89 | 73,279 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,174 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,237,354 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,324,731 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,280 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,830 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,794 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,871 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,674 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 169,941 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,859 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,602 |
| Slavic Countries | 0 | - | 4.96 | 111,368 |
| French History Multiple Choice | 0 | - | 4.55 | 32,972 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,243 |
| History of Germany | 0 | - | 4.39 | 52,749 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,299 |
| History of Spain | 0 | - | 4.23 | 21,058 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,731 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,119 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,319 |
| Regions of France | 0 | - | 4.75 | 120,182 |
| France Immigration by Country | 0 | - | 4.70 | 76,307 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,796 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,027 |
| Ancient Greek Words | 0 | - | 4.93 | 111,220 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,144 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,178 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,953 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,541 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 96,684 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,563 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,108 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,704 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,361 |
| Monarchies of Europe | 0 | - | 4.90 | 97,801 |
| European Countries with One Border | 0 | - | 4.97 | 182,307 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,152 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,789 |
| Federal Subjects of Russia | 0 | - | 4.95 | 145,826 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,619 |
| French Inventions | 0 | - | 4.08 | 13,885 |
| History of Paris | 0 | - | 4.24 | 13,633 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,344 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,078 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,917 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,965 |
| American to British Word Translation | 0 | - | 4.14 | 138,560 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,839 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,863 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,284 |
| Champions League Winners | 0 | - | 4.92 | 1,002,240 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,473 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,731 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,620 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,189 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,984 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,379 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,357 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,127 |
| Russia Country Quiz | 0 | - | 4.85 | 114,150 |
| Countries That Border Russia | 0 | - | 4.98 | 460,726 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,161 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,244 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,212 |
| Departments of France | 0 | - | 4.93 | 53,534 |
| Countries Bordering France | 0 | - | 4.83 | 401,507 |
| Germany Country Quiz | 0 | - | 4.82 | 157,367 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,751 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,312 |
| Italy Country Quiz | 0 | - | 4.82 | 122,834 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,961 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,668 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,481 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,635 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,561 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,200 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,046 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,148 |
| England or Wales? | 0 | - | 4.94 | 45,541 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,483 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,228 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,637 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,086 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,086 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,893 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,862 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,143 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,192 |
| Canary Islands | 0 | - | 4.62 | 17,451 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,517 |
| British Spellings | 0 | - | 4.06 | 99,376 |
| British Groups of Things | 0 | - | 4.25 | 82,810 |
| British Acronyms | 0 | - | 4.39 | 45,726 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,007 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,919 |
| Geography of Scotland | 0 | - | 4.63 | 21,570 |
| Medieval English History | 0 | - | 4.53 | 43,429 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,681,501 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,285 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,990 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,203 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,229 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,625 |
| Countries that Border Poland | 0 | - | 4.99 | 171,926 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,646 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,875 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,013 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,760 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,707 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,162 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,679 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,573 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,106 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,744 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,043 |
| Geography of Germany | 0 | - | 4.35 | 17,147 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,746 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,359 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,573 |
| Counties of Ireland | 0 | - | 4.92 | 194,285 |
| Italian Inventions | 0 | - | 3.81 | 18,430 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,701 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,517 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,662 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,826 |
| Roman Names for Places | 0 | - | 4.62 | 58,121 |
| Byzantine History | 0 | - | 4.91 | 28,733 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,097 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,402 |
| British to American Word Translation | 0 | - | 3.74 | 254,950 |
| British Foods by Description | 0 | - | 3.94 | 48,303 |
| British and American Word Differences | 0 | - | 2.63 | 46,844 |
| English Inventions #1 | 0 | - | 3.15 | 23,545 |
| English Inventions #2 | 0 | - | 4.00 | 8,687 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,562 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 129,806 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,710 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,528 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,073 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,911 |
| Prime Ministers of the UK | 0 | - | 4.95 | 437,168 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,145 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,596 |
| Bridges of London | 0 | - | 4.17 | 10,087 |
| British Sport Trivia | 0 | - | 4.37 | 20,421 |
| 2025–2026 Football League Teams | 0 | - | 4.93 | 399,669 |
| Famous Welsh People | 0 | - | 4.29 | 11,260 |
| Liechtenstein Country Quiz | 0 | - | 4.64 | 26,999 |
| San Marino Country Quiz | 0 | - | 4.70 | 28,902 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,631 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,271 |
