| States of Germany Map Quiz | 0 | - | 4.91 | 131,667 |
| States of Germany | 0 | - | 4.96 | 150,000 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,998 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,514 |
| History of Germany | 0 | - | 4.39 | 52,612 |
| Germany Country Quiz | 0 | - | 4.82 | 156,506 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,349 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,119 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,473 |
| Counties of England | 0 | - | 4.97 | 789,009 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,167 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,758 |
| Geography of the British Empire | 0 | - | 4.48 | 39,469 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,910 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,391 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,362 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,085 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,992 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,094 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,765 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,765 |
| Regions of Italy | 0 | - | 4.92 | 74,681 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,789 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,300 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,135 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,892 |
| Medieval English History | 0 | - | 4.53 | 43,314 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,439 |
| French History Multiple Choice | 0 | - | 4.55 | 32,871 |
| Countries Bordering Germany | 0 | - | 4.99 | 366,977 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,089 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,132 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,160 |
| Departments of France | 0 | - | 4.93 | 52,786 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,129 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,429 |
| Italy Country Quiz | 0 | - | 4.82 | 122,167 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,333 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,055 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,357 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,937 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,618 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,228 |
| Name the English Monarchs | 0 | - | 4.92 | 497,786 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,686 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,072 |
| England or Wales? | 0 | - | 4.94 | 45,306 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,121 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,262 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,111 |
| History of Scotland | 0 | - | 4.51 | 20,998 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,383 |
| Kings of France Quiz | 0 | - | 4.20 | 32,549 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,348 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,447 |
| German Inventions | 0 | - | 3.91 | 30,181 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,569 |
| The Trojan War | 0 | - | 4.83 | 39,424 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,755 |
| Name that Greek Letter | 0 | - | 4.94 | 321,618 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,507 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,037 |
| Roman Emperors | 0 | - | 4.95 | 118,434 |
| Malta Country Quiz | 0 | - | 4.81 | 30,824 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,928 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,269 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,503 |
| The Only European Country ... | 0 | - | 4.91 | 213,757 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,487 |
| History of Russia Quiz | 0 | - | 4.49 | 31,788 |
| 101 Figures from Greek Mythology | 0 | - | 5.00 | 124,240 |
| History of Italy | 0 | - | 4.55 | 31,813 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,477 |
| History of The Netherlands | 0 | - | 4.46 | 17,308 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,978 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,379 |
| Former Dominions of the British Empire | 0 | - | 4.30 | 24,080 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,950 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,829 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,127 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,549 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,691 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,265 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,265 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,455 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,774 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,828 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,228 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,171 |
| Slavic Countries | 0 | - | 4.96 | 110,831 |
| 15 Most Populous Countries that Speak a Germanic Language | 0 | - | 4.39 | 82,306 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,894 |
| Ancient Greek Words | 0 | - | 4.92 | 110,655 |
| Oldest Cities in the United Kingdom | 0 | - | 4.39 | 23,610 |
| History of London | 0 | - | 4.33 | 26,098 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,779 |
| Regions of France | 0 | - | 4.78 | 119,195 |
| France Immigration by Country | 0 | - | 4.72 | 75,952 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,456 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,448 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,612 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,768 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,042 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,088 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,932 |
| The UK for Americans - True or False | 0 | - | 4.46 | 58,383 |
| Champions League Winners | 0 | - | 4.92 | 996,117 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,316 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,027 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,345 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,823 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,776 |
| Monarchies of Europe | 0 | - | 4.90 | 97,294 |
| European Countries with One Border | 0 | - | 4.97 | 181,590 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,501 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,216 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,932 |
| Countries That Border Russia | 0 | - | 4.98 | 458,843 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,175 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Austria Country Quiz | 0 | - | 4.57 | 59,330 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,220 |
| France Country Quiz | 0 | - | 4.70 | 133,809 |
| French Inventions | 0 | - | 4.08 | 13,864 |
| Geography of the French Empire | 0 | - | 4.48 | 26,924 |
| The French Revolution | 0 | - | 4.46 | 23,778 |
| Countries Bordering France | 0 | - | 4.83 | 398,767 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| History of France | 0 | - | 4.59 | 56,004 |
| German Cities with the Most Tourists | 0 | - | 4.77 | 48,260 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 26,927 |
| Greece Country Quiz | 0 | - | 4.74 | 65,744 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,038 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,477 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,232 |
| Netherlands Country Quiz | 0 | - | 4.50 | 79,951 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,744 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,686 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,325 |
| The Portuguese Empire | 0 | - | 4.54 | 11,989 |
| Spain Country Quiz | 0 | - | 4.45 | 127,580 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,932 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,064 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,209 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,559 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,169 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,403 |
| Counties of Wales | 0 | - | 4.63 | 38,889 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,850 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,223 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,104 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,461 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,159 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,128 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,683 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,215 |
| Russia Country Quiz | 0 | - | 4.85 | 113,619 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,838 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,027 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,621 |
| German History A-Z | 0 | - | 4.49 | 24,214 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,897 |
| History of Ireland | 0 | - | 4.39 | 30,819 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,938 |
| Byzantine History | 0 | - | 4.91 | 28,612 |
| Canary Islands | 0 | - | 4.61 | 17,399 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,780 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,138 |
| British Spellings | 0 | - | 4.07 | 99,201 |
| British Groups of Things | 0 | - | 4.25 | 82,668 |
| British Acronyms | 0 | - | 4.39 | 45,617 |
| UK Immigration by Country | 0 | - | 4.94 | 139,595 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,944 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,108 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.62 | 24,441 |
| Geography of Scotland | 0 | - | 4.63 | 21,475 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,448 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,653,064 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,221 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,782 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,598 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,833 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,999 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,780 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,946 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,770 |
| Countries that Border Poland | 0 | - | 4.99 | 171,324 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,365 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,874 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,391 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,682 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,605 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,534 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,724 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,508 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,761 |
| 20 Questions About France | 0 | - | 4.11 | 32,335 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,512 |
