| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,513 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,828 |
| Geography of the French Empire | 0 | - | 4.45 | 27,236 |
| Counties of England | 0 | - | 4.97 | 804,404 |
| History of France | 0 | - | 4.61 | 57,736 |
| History of Italy | 0 | - | 4.55 | 32,186 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,856 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,470 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,150 |
| Europe Map Quiz | 0 | - | 5.00 | 4,793,889 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,581 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,111 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,033 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,036 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,743 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,991 |
| States of Germany | 0 | - | 4.95 | 154,968 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,822 |
| Regions of Italy | 0 | - | 4.92 | 77,276 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,927 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,609 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,907 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,654 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,874 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,831 |
| Regions of France | 0 | - | 4.70 | 122,424 |
| France Immigration by Country | 0 | - | 4.70 | 77,017 |
| Departments of France | 0 | - | 4.93 | 55,417 |
| Countries Bordering France | 0 | - | 4.83 | 405,399 |
| French History Multiple Choice | 0 | - | 4.55 | 33,280 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,436 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,578 |
| The Vikings! | 0 | - | 4.46 | 28,425 |
| The Portuguese Empire | 0 | - | 4.58 | 12,118 |
| Name the English Monarchs | 0 | - | 4.91 | 507,457 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,290 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,233 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,570 |
| 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 | 123,392 |
| Geography of the British Empire | 0 | - | 4.48 | 39,882 |
| Malta Country Quiz | 0 | - | 4.81 | 31,268 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,281 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,625 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,524 |
| The Only European Country ... | 0 | - | 4.91 | 219,647 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,861 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,072 |
| Name that Greek Letter | 0 | - | 4.93 | 325,332 |
| History of The Netherlands | 0 | - | 4.46 | 17,572 |
| History of Russia Quiz | 0 | - | 4.47 | 32,028 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,818 |
| The Trojan War | 0 | - | 4.83 | 40,090 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,260 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,704 |
| Roman Emperors | 0 | - | 4.95 | 121,458 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,261,716 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,337,360 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,800 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,557 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 221,316 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,917 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,223 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,576 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,392 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,928 |
| Slavic Countries | 0 | - | 4.96 | 112,524 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,758 |
| History of Germany | 0 | - | 4.39 | 53,004 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,969 |
| History of Spain | 0 | - | 4.23 | 21,178 |
| Anglo-Saxon Kingdoms of England | 0 | - | 4.60 | 25,836 |
| Giant Great Britain Millennium Quiz | 0 | - | 4.78 | 20,257 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,765 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,362 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,595 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,534 |
| Ancient Greek Words | 0 | - | 4.93 | 112,688 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,942 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,478 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,968 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,857 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,105 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 97,008 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,750 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,894 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,638 |
| Monarchies of Europe | 0 | - | 4.90 | 99,049 |
| European Countries with One Border | 0 | - | 4.97 | 184,049 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,769 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,100 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,964 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,595 |
| France Country Quiz | 0 | - | 4.70 | 135,831 |
| Movies Set in France | 0 | - | 4.26 | 13,159 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,225 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,616 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,183 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,629 |
| American to British Word Translation | 0 | - | 4.14 | 139,843 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,094 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,310 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,499 |
| Champions League Winners | 0 | - | 4.92 | 1,018,184 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 194,085 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,973 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,385 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,362 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,306 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,448 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,143 |
| Russia Country Quiz | 0 | - | 4.83 | 115,466 |
| Countries That Border Russia | 0 | - | 4.98 | 464,962 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,843 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,651 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,995 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,013 |
| Kings of France Quiz | 0 | - | 4.22 | 32,972 |
| Germany Country Quiz | 0 | - | 4.82 | 159,084 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,250 |
| Countries Bordering Germany | 0 | - | 4.99 | 372,280 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,452 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,247 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,785 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,503 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,639 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,057 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,062 |
| Former Dominions of the British Empire | 0 | - | 4.27 | 24,284 |
| England or Wales? | 0 | - | 4.94 | 46,062 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,507 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,718 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,118 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,742 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,188 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,789 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,285 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,076 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 21,051 |
| Figures from Greek Mythology | 0 | - | 4.91 | 192,887 |
| Countries Italy Declared War On | 0 | - | 4.74 | 48,298 |
| Canary Islands | 0 | - | 4.62 | 17,550 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,168 |
| British Spellings | 0 | - | 4.06 | 99,631 |
| British Groups of Things | 0 | - | 4.26 | 83,044 |
| British Acronyms | 0 | - | 4.40 | 45,979 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,132 |
| Biggest Immigrant Groups by Decade in the UK | 0 | - | 4.63 | 25,868 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,223 |
| Geography of Scotland | 0 | - | 4.63 | 21,826 |
| Medieval English History | 0 | - | 4.53 | 43,691 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,731,701 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,029 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,407 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,831 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,068 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,293 |
| Countries that Border Poland | 0 | - | 4.99 | 173,358 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,361 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 103,336 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,114 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,097 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,069 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,228 |
| Countries Bordering Austria | 0 | - | 4.97 | 119,058 |
| 20 Questions About France | 0 | - | 4.11 | 32,486 |
| Countries that Beat France | 0 | - | 4.48 | 76,508 |
| 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 | 17,428 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 99,177 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,493 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,894 |
| Counties of Ireland | 0 | - | 4.92 | 197,721 |
| Italian Inventions | 0 | - | 3.81 | 18,483 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,378 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,683 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,400 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,270 |
| Roman Names for Places | 0 | - | 4.62 | 58,795 |
| Byzantine History | 0 | - | 4.91 | 29,055 |
| Byzantine Emperors | 0 | - | 4.93 | 14,665 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,335 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,398 |
| British to American Word Translation | 0 | - | 3.74 | 255,403 |
| British Foods by Description | 0 | - | 3.94 | 48,416 |
| 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 | 28,258 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,688 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 32,006 |
| Houses of British Monarchs | 0 | - | 4.54 | 66,034 |
| British History Multiple Choice #1 | 0 | - | 4.46 | 55,359 |
| British History Multiple Choice #2 | 0 | - | 4.42 | 38,106 |
| Prime Ministers of the UK | 0 | - | 4.95 | 443,232 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,424 |
