| Regions of Italy | 0 | - | 4.92 | 75,309 |
| Italy Country Quiz | 0 | - | 4.82 | 122,786 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,913 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,468 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,774 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,405 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,927 |
| Counties of England | 0 | - | 4.97 | 793,235 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,802 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,329 |
| Roman Emperors | 0 | - | 4.95 | 119,417 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,640 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,947 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,070 |
| 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 | 56,451 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,929 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,307 |
| States of Germany | 0 | - | 4.96 | 151,324 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,673 |
| History of Italy | 0 | - | 4.55 | 31,911 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 50,854 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,315 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,796 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,405 |
| Europe Map Quiz | 0 | - | 5.00 | 4,748,783 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,774 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,326 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,145 |
| Departments of France | 0 | - | 4.93 | 53,453 |
| Germany Country Quiz | 0 | - | 4.82 | 157,300 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,680 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,600 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,513 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,139 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,975 |
| England or Wales? | 0 | - | 4.94 | 45,518 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,808 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,426 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,879 |
| Name the English Monarchs | 0 | - | 4.92 | 500,526 |
| 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 | 39,601 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,557 |
| French Inventions | 0 | - | 4.08 | 13,881 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,107 |
| Name that Greek Letter | 0 | - | 4.93 | 322,744 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,668 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,074 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,431 |
| Malta Country Quiz | 0 | - | 4.81 | 30,958 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 27,795 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,133 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,447 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,467 |
| The Only European Country ... | 0 | - | 4.91 | 215,421 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,471 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,885 |
| The Trojan War | 0 | - | 4.83 | 39,594 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,852 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,288 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,013 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,177 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,193 |
| History of The Netherlands | 0 | - | 4.46 | 17,375 |
| 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 | 125,212 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,651 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,813 |
| Roman Names for Places | 0 | - | 4.62 | 58,091 |
| Byzantine History | 0 | - | 4.91 | 28,719 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,586 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,115 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,750 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,065 |
| 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 | 67,907 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,236,362 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,324,247 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,238 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,776 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,655 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,838 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,532 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,794 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,826 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,584 |
| Slavic Countries | 0 | - | 4.96 | 111,327 |
| Regions of France | 0 | - | 4.77 | 120,104 |
| France Immigration by Country | 0 | - | 4.72 | 76,276 |
| History of Germany | 0 | - | 4.39 | 52,740 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,770 |
| Ancient Greek Words | 0 | - | 4.93 | 111,182 |
| 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 | 102,919 |
| 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 | 353,031 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,658 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,506 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,044 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,635 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,319 |
| Monarchies of Europe | 0 | - | 4.90 | 97,769 |
| European Countries with One Border | 0 | - | 4.97 | 182,239 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,097 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,741 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,619 |
| Russian Inventions | 0 | - | 4.39 | 12,927 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,585 |
| History of Paris | 0 | - | 4.24 | 13,632 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,282 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,573 |
| English Inventions #1 | 0 | - | 3.15 | 23,542 |
| English Inventions #2 | 0 | - | 4.00 | 8,684 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,765 |
| Embarrassing Chapters in British History | 0 | - | 4.29 | 32,202 |
| History of Scotland | 0 | - | 4.51 | 21,055 |
| Champions League Winners | 0 | - | 4.92 | 1,001,642 |
| Countries That Border Russia | 0 | - | 4.98 | 460,568 |
| History of Austria | 0 | - | 4.70 | 17,815 |
| Austria Country Quiz | 0 | - | 4.57 | 59,557 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,529 |
| France Country Quiz | 0 | - | 4.70 | 134,569 |
| Geography of the French Empire | 0 | - | 4.45 | 27,007 |
| The French Revolution | 0 | - | 4.46 | 23,877 |
| Countries Bordering France | 0 | - | 4.83 | 401,371 |
| Kings of France Quiz | 0 | - | 4.20 | 32,638 |
| History of France | 0 | - | 4.59 | 56,677 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,442 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,186 |
| Greece Country Quiz | 0 | - | 4.74 | 66,030 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,334 |
| Seven Hills of Rome | 0 | - | 4.70 | 9,147 |
| Luxembourg Country Quiz | 0 | - | 4.78 | 33,634 |
| 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 | 28,300 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,940 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,638 |
| The Portuguese Empire | 0 | - | 4.58 | 12,034 |
| Spain Country Quiz | 0 | - | 4.45 | 128,127 |
| Switzerland Country Quiz | 0 | - | 4.51 | 63,170 |
| 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 | 43,272 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,631 |
| Counties of Wales | 0 | - | 4.63 | 39,114 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,417 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,706 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,582 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,076 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,865 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,262 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,139 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,043 |
| Russia Country Quiz | 0 | - | 4.85 | 114,110 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,143 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,222 |
| History of Ireland | 0 | - | 4.39 | 31,040 |
| Italian Foods | 0 | - | 4.31 | 72,520 |
| The Life of Julius Caesar | 0 | - | 4.39 | 39,034 |
| Canary Islands | 0 | - | 4.61 | 17,445 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,521 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,489 |
| British Spellings | 0 | - | 4.06 | 99,366 |
| British Groups of Things | 0 | - | 4.25 | 82,800 |
| British Acronyms | 0 | - | 4.39 | 45,722 |
| UK Immigration by Country | 0 | - | 4.94 | 140,463 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,002 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,092 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 24,872 |
| Geography of Scotland | 0 | - | 4.63 | 21,565 |
| 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 | 129,403 |
| Chinese Inventions | 0 | - | 4.30 | 33,764 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,678,748 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,166 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,065 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,964 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,635 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,163 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,006 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,194 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,582 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,056 |
| Countries that Border Poland | 0 | - | 4.99 | 171,871 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,616 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,750 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,987 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,747 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,690 |
