| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,512 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,822 |
| Geography of the French Empire | 0 | - | 4.45 | 27,236 |
| The French Revolution | 0 | - | 4.47 | 24,169 |
| Counties of England | 0 | - | 4.97 | 804,354 |
| History of France | 0 | - | 4.61 | 57,731 |
| History of Italy | 0 | - | 4.55 | 32,185 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,853 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,470 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,148 |
| Europe Map Quiz | 0 | - | 5.00 | 4,793,692 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,571 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,076 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,027 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,028 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,740 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,988 |
| States of Germany | 0 | - | 4.95 | 154,958 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,813 |
| Regions of Italy | 0 | - | 4.92 | 77,268 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,920 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,602 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,906 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,644 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,871 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,828 |
| Regions of France | 0 | - | 4.70 | 122,421 |
| France Immigration by Country | 0 | - | 4.70 | 77,014 |
| Departments of France | 0 | - | 4.93 | 55,411 |
| Countries Bordering France | 0 | - | 4.83 | 405,383 |
| French History Multiple Choice | 0 | - | 4.55 | 33,279 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,427 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,578 |
| The Vikings! | 0 | - | 4.46 | 28,424 |
| The Portuguese Empire | 0 | - | 4.58 | 12,118 |
| Name the English Monarchs | 0 | - | 4.91 | 507,430 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,284 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,228 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,567 |
| History of Paris | 0 | - | 4.24 | 13,687 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,492 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,385 |
| Geography of the British Empire | 0 | - | 4.48 | 39,881 |
| Malta Country Quiz | 0 | - | 4.81 | 31,266 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,260 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,610 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,507 |
| The Only European Country ... | 0 | - | 4.91 | 219,620 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,849 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,022 |
| Name that Greek Letter | 0 | - | 4.93 | 325,312 |
| History of The Netherlands | 0 | - | 4.46 | 17,572 |
| History of Russia Quiz | 0 | - | 4.47 | 32,027 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,814 |
| The Trojan War | 0 | - | 4.83 | 40,077 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,240 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,700 |
| Roman Emperors | 0 | - | 4.95 | 121,450 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,261,622 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,304 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,793 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,546 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,300 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,914 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,208 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,551 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,380 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,919 |
| Slavic Countries | 0 | - | 4.96 | 112,517 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,755 |
| History of Germany | 0 | - | 4.39 | 53,003 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,937 |
| History of Spain | 0 | - | 4.23 | 21,178 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,834 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,255 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,721 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,362 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,590 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,490 |
| Ancient Greek Words | 0 | - | 4.93 | 112,676 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,942 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,469 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,965 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,855 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,102 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,001 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,736 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,880 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,636 |
| Monarchies of Europe | 0 | - | 4.90 | 99,046 |
| European Countries with One Border | 0 | - | 4.97 | 184,043 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,757 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,089 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,958 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,591 |
| France Country Quiz | 0 | - | 4.70 | 135,820 |
| Movies Set in France | 0 | - | 4.26 | 13,159 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,223 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,180 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,623 |
| American to British Word Translation | 0 | - | 4.14 | 139,832 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,094 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,303 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,496 |
| Champions League Winners | 0 | - | 4.92 | 1,018,127 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,081 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,964 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,368 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,352 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,288 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,410 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,137 |
| Russia Country Quiz | 0 | - | 4.83 | 115,460 |
| Countries That Border Russia | 0 | - | 4.98 | 464,941 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,837 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,645 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,993 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,005 |
| Kings of France Quiz | 0 | - | 4.22 | 32,971 |
| Germany Country Quiz | 0 | - | 4.82 | 159,065 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,244 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,273 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,448 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,239 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,784 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,475 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,634 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,048 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,051 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,282 |
| England or Wales? | 0 | - | 4.94 | 46,047 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,498 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,710 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,092 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,742 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,136 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,786 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,285 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,074 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,035 |
| Figures from Greek Mythology | 0 | - | 4.91 | 192,288 |
| Countries Italy Declared War On | 0 | - | 4.74 | 48,243 |
| Canary Islands | 0 | - | 4.62 | 17,549 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,162 |
| British Spellings | 0 | - | 4.06 | 99,629 |
| British Groups of Things | 0 | - | 4.26 | 83,044 |
| British Acronyms | 0 | - | 4.40 | 45,978 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,129 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,866 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,221 |
| Geography of Scotland | 0 | - | 4.63 | 21,823 |
| Medieval English History | 0 | - | 4.53 | 43,691 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,731,430 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,010 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,406 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,828 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,059 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,280 |
| Countries that Border Poland | 0 | - | 4.99 | 173,354 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,357 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,312 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,110 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,096 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,066 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,224 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,052 |
| 20 Questions About France | 0 | - | 4.11 | 32,486 |
| Countries that Beat France | 0 | - | 4.48 | 76,504 |
| France True or False? | 0 | - | 4.44 | 40,114 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,176 |
| Geography of Germany | 0 | - | 4.36 | 17,420 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,160 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,483 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,893 |
| Counties of Ireland | 0 | - | 4.92 | 197,702 |
| Italian Inventions | 0 | - | 3.81 | 18,483 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,376 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,666 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,394 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,268 |
| Roman Names for Places | 0 | - | 4.62 | 58,790 |
| Byzantine History | 0 | - | 4.91 | 29,052 |
| Byzantine Emperors | 0 | - | 4.93 | 14,664 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,334 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,395 |
| British to American Word Translation | 0 | - | 3.74 | 255,401 |
| British Foods by Description | 0 | - | 3.94 | 48,408 |
| British and American Word Differences | 0 | - | 2.63 | 46,939 |
| English Inventions #1 | 0 | - | 3.15 | 23,608 |
| English Inventions #2 | 0 | - | 3.95 | 8,730 |
| British Geography Quiz #2 | 0 | - | 4.30 | 28,256 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,670 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,005 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,029 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,355 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,106 |
| Prime Ministers of the UK | 0 | - | 4.95 | 443,203 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,365 |
