| Regions of Italy | 0 | - | 4.92 | 74,843 |
| Italy Country Quiz | 0 | - | 4.82 | 122,337 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,527 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,389 |
| England or Wales? | 0 | - | 4.94 | 45,370 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,446 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,188 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,594 |
| French History Multiple Choice | 0 | - | 4.55 | 32,894 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 54,977 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,852 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,116 |
| Roman Emperors | 0 | - | 4.95 | 118,618 |
| Counties of England | 0 | - | 4.97 | 789,982 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,597 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,070 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,524 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,562 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,209 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,112 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,329 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,837 |
| States of Germany | 0 | - | 4.96 | 150,346 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,118 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,585 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,871 |
| History of Italy | 0 | - | 4.55 | 31,844 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,904 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,493 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,397 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,109 |
| Europe Map Quiz | 0 | - | 5.00 | 4,734,583 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 42,637 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,189 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,340 |
| Departments of France | 0 | - | 4.93 | 52,943 |
| Germany Country Quiz | 0 | - | 4.82 | 156,717 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,270 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,203 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,949 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,665 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,155 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,743 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,466 |
| Name the English Monarchs | 0 | - | 4.92 | 498,488 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,543 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,501 |
| Countries Closest to Italy | 0 | - | 4.97 | 196,451 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,215 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,217 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,896 |
| Geography of the British Empire | 0 | - | 4.48 | 39,510 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,440 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,803 |
| The Trojan War | 0 | - | 4.83 | 39,468 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,790 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,623 |
| Name that Greek Letter | 0 | - | 4.94 | 321,854 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,712 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,180 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,050 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,016 |
| Countries that Beat Italy | 0 | - | 4.85 | 53,946 |
| Medieval English History | 0 | - | 4.53 | 43,334 |
| Malta Country Quiz | 0 | - | 4.81 | 30,864 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,494 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,228 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,543 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,740 |
| The Only European Country ... | 0 | - | 4.91 | 214,133 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,752 |
| History of Russia Quiz | 0 | - | 4.49 | 31,803 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,497 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,565 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,705 |
| Roman Names for Places | 0 | - | 4.62 | 57,918 |
| Byzantine History | 0 | - | 4.91 | 28,649 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,497 |
| History of The Netherlands | 0 | - | 4.46 | 17,328 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,003 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,578 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,103 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 67,543 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,228,619 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,320,767 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,806 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,397 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,586 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,555 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,091 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,295 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,371 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,287 |
| Slavic Countries | 0 | - | 4.96 | 110,946 |
| History of Germany | 0 | - | 4.39 | 52,645 |
| Ancient Greek Words | 0 | - | 4.92 | 110,803 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,694 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,082 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,549 |
| Regions of France | 0 | - | 4.78 | 119,411 |
| France Immigration by Country | 0 | - | 4.72 | 76,019 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,661 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,530 |
| Famous Ancient Romans | 0 | - | 4.69 | 85,060 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,880 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,082 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,425 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,061 |
| The UK for Americans - True or False | 0 | - | 4.44 | 58,430 |
| UK General Knowledge Multiple Choice #3 | 0 | - | 4.53 | 18,043 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,135 |
| History of Scotland | 0 | - | 4.51 | 21,011 |
| Champions League Winners | 0 | - | 4.92 | 997,416 |
| Australia... or New Zealand? | 0 | - | 4.83 | 61,114 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,432 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,103 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,513 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,022 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,907 |
| Monarchies of Europe | 0 | - | 4.90 | 97,410 |
| European Countries with One Border | 0 | - | 4.97 | 181,746 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,643 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,381 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,327 |
| Countries That Border Russia | 0 | - | 4.98 | 459,302 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,277 |
| History of Austria | 0 | - | 4.70 | 17,767 |
| Austria Country Quiz | 0 | - | 4.57 | 59,396 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,302 |
| France Country Quiz | 0 | - | 4.70 | 133,946 |
| French Inventions | 0 | - | 4.08 | 13,866 |
| Geography of the French Empire | 0 | - | 4.45 | 26,949 |
| The French Revolution | 0 | - | 4.46 | 23,804 |
| Countries Bordering France | 0 | - | 4.83 | 399,985 |
| History of Paris | 0 | - | 4.24 | 13,620 |
| Kings of France Quiz | 0 | - | 4.20 | 32,576 |
| History of France | 0 | - | 4.59 | 56,203 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,395 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,292 |
| Greece Country Quiz | 0 | - | 4.74 | 65,816 |
| Italian Inventions | 0 | - | 3.81 | 18,415 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,119 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,521 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,276 |
| Netherlands Country Quiz | 0 | - | 4.50 | 80,036 |
| Nordic Cities Map Quiz | 0 | - | 4.74 | 89,807 |
| The Vikings! | 0 | - | 4.46 | 28,254 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,731 |
| Sweden True or False? | 0 | - | 4.56 | 40,104 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,419 |
| The Portuguese Empire | 0 | - | 4.54 | 12,001 |
| Spain Country Quiz | 0 | - | 4.45 | 127,714 |
| Switzerland Country Quiz | 0 | - | 4.51 | 62,984 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,245 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,279 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,580 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,081 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,558 |
| Counties of Wales | 0 | - | 4.63 | 38,948 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,014 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,331 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,192 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,784 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,437 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,360 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 257,180 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,379 |
| Russia Country Quiz | 0 | - | 4.85 | 113,731 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,915 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,082 |
| History of Ireland | 0 | - | 4.39 | 30,862 |
| Italian Foods | 0 | - | 4.31 | 72,258 |
| The Life of Julius Caesar | 0 | - | 4.39 | 38,974 |
| Canary Islands | 0 | - | 4.61 | 17,412 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,072 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,209 |
| British Spellings | 0 | - | 4.07 | 99,273 |
| British Groups of Things | 0 | - | 4.25 | 82,711 |
| British Acronyms | 0 | - | 4.39 | 45,641 |
| UK Immigration by Country | 0 | - | 4.94 | 139,792 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,966 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,378 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,555 |
| Geography of Scotland | 0 | - | 4.63 | 21,499 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,099 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,672 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,659,386 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,395 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,822 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,608 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 137,906 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,248 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,892 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,077 |
| Random Point on Land to European Country | 0 | - | 4.93 | 76,191 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,826 |
| Countries that Border Poland | 0 | - | 4.99 | 171,463 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,429 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,983 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,744 |
