| Regions of Italy | 0 | - | 4.92 | 75,306 |
| Italy Country Quiz | 0 | - | 4.82 | 122,782 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,907 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,466 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,771 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,402 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,922 |
| Counties of England | 0 | - | 4.97 | 793,210 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,802 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,327 |
| Roman Emperors | 0 | - | 4.95 | 119,413 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,638 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,945 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,066 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,561 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,447 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,917 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,304 |
| States of Germany | 0 | - | 4.96 | 151,314 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,667 |
| History of Italy | 0 | - | 4.55 | 31,911 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 50,805 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,314 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,796 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,403 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,707 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,755 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,323 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,141 |
| Departments of France | 0 | - | 4.93 | 53,450 |
| Germany Country Quiz | 0 | - | 4.82 | 157,299 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,677 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,592 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,508 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,130 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,967 |
| England or Wales? | 0 | - | 4.94 | 45,518 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,797 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,412 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,878 |
| Name the English Monarchs | 0 | - | 4.92 | 500,515 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,278 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,167 |
| Geography of the British Empire | 0 | - | 4.48 | 39,600 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,556 |
| French Inventions | 0 | - | 4.08 | 13,881 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,085 |
| Name that Greek Letter | 0 | - | 4.93 | 322,729 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,666 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,074 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,388 |
| Malta Country Quiz | 0 | - | 4.81 | 30,957 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,794 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,124 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,441 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,459 |
| The Only European Country ... | 0 | - | 4.91 | 215,410 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,467 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,884 |
| The Trojan War | 0 | - | 4.83 | 39,593 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,852 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,281 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,007 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,175 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,192 |
| History of The Netherlands | 0 | - | 4.46 | 17,374 |
| Medieval English History | 0 | - | 4.53 | 43,423 |
| History of Russia Quiz | 0 | - | 4.49 | 31,859 |
| French History Multiple Choice | 0 | - | 4.55 | 32,962 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,211 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,649 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,813 |
| Roman Names for Places | 0 | - | 4.62 | 58,090 |
| Byzantine History | 0 | - | 4.91 | 28,718 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,585 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,115 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,747 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,064 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 37,905 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,161 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 67,902 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,236,313 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,324,234 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,235 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,773 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,646 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,832 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,527 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,790 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,824 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,583 |
| Slavic Countries | 0 | - | 4.96 | 111,325 |
| Regions of France | 0 | - | 4.77 | 120,092 |
| France Immigration by Country | 0 | - | 4.72 | 76,272 |
| History of Germany | 0 | - | 4.39 | 52,740 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,768 |
| Ancient Greek Words | 0 | - | 4.93 | 111,178 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,112 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,167 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,914 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,523 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,727 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,116 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,016 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,658 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,503 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,039 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,630 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,318 |
| Monarchies of Europe | 0 | - | 4.90 | 97,767 |
| European Countries with One Border | 0 | - | 4.97 | 182,234 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,096 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,739 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,606 |
| Russian Inventions | 0 | - | 4.39 | 12,926 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,583 |
| History of Paris | 0 | - | 4.24 | 13,632 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,280 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,563 |
| English Inventions #1 | 0 | - | 3.15 | 23,542 |
| English Inventions #2 | 0 | - | 4.00 | 8,684 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,760 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,201 |
| History of Scotland | 0 | - | 4.51 | 21,055 |
| Champions League Winners | 0 | - | 4.92 | 1,001,600 |
| Countries That Border Russia | 0 | - | 4.98 | 460,562 |
| History of Austria | 0 | - | 4.70 | 17,815 |
| Austria Country Quiz | 0 | - | 4.57 | 59,557 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,528 |
| France Country Quiz | 0 | - | 4.70 | 134,566 |
| Geography of the French Empire | 0 | - | 4.45 | 27,007 |
| The French Revolution | 0 | - | 4.46 | 23,877 |
| Countries Bordering France | 0 | - | 4.83 | 401,360 |
| Kings of France Quiz | 0 | - | 4.20 | 32,638 |
| History of France | 0 | - | 4.59 | 56,676 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,442 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,177 |
| Greece Country Quiz | 0 | - | 4.74 | 66,030 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,333 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,147 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,630 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,384 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,274 |
| Nordic Cities Map Quiz | 0 | - | 4.77 | 90,298 |
| The Vikings! | 0 | - | 4.46 | 28,299 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,938 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,638 |
| The Portuguese Empire | 0 | - | 4.58 | 12,034 |
| Spain Country Quiz | 0 | - | 4.45 | 128,123 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,169 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,472 |
| Largest Islands in the British Isles With a Map | 0 | - | 4.52 | 38,646 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,271 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,630 |
| Counties of Wales | 0 | - | 4.63 | 39,113 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,415 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,705 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,578 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,067 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,859 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,258 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,120 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,040 |
| Russia Country Quiz | 0 | - | 4.85 | 114,105 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,140 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,222 |
| History of Ireland | 0 | - | 4.39 | 31,039 |
| Italian Foods | 0 | - | 4.31 | 72,516 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,034 |
| Canary Islands | 0 | - | 4.61 | 17,445 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,519 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,488 |
| British Spellings | 0 | - | 4.06 | 99,366 |
| British Groups of Things | 0 | - | 4.25 | 82,798 |
| British Acronyms | 0 | - | 4.39 | 45,721 |
| UK Immigration by Country | 0 | - | 4.94 | 140,458 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,002 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,089 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,872 |
| Geography of Scotland | 0 | - | 4.63 | 21,564 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,139 |
| Scottish Inventions | 0 | - | 3.83 | 9,950 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,398 |
| Chinese Inventions | 0 | - | 4.30 | 33,764 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,678,560 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,141 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,059 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,962 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,634 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,163 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,001 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,193 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,579 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,055 |
| Countries that Border Poland | 0 | - | 4.99 | 171,866 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,613 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,739 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,986 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,744 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,688 |
