| French Geography Quiz #1 | 0 | - | 4.89 | 35,007 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,333,802 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,393 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,578 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,436 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,341 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,090 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,690 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,493 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,627 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,384 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,936 |
| Countries That Border Russia | 0 | - | 4.98 | 463,911 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,504 |
| Europe Map Quiz | 0 | - | 5.00 | 4,780,785 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,451 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,104 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,403 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,366 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,135 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,463 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,433 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,740 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,611 |
| Russia Country Quiz | 0 | - | 4.83 | 115,145 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,621 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,506 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,693 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,801 |
| Countries that Border Poland | 0 | - | 4.99 | 172,949 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,133 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,388 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,891 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,917 |
| Name the English Monarchs | 0 | - | 4.91 | 505,415 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,187 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,995 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,972 |
| The Trojan War | 0 | - | 4.83 | 39,933 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,719 |
| Name that Greek Letter | 0 | - | 4.93 | 324,671 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,677 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,485 |
| Roman Emperors | 0 | - | 4.95 | 120,897 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,731 |
| Topological Map of Asia Quiz | 0 | - | 4.82 | 20,357 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,286 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,728 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,829 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,745 |
| The Only European Country ... | 0 | - | 4.91 | 218,361 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,161 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,697 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,988 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,134 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,145 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,253,860 |
| History of Russia Quiz | 0 | - | 4.47 | 31,985 |
| Ancient Greek Words | 0 | - | 4.93 | 112,248 |
| History of Italy | 0 | - | 4.55 | 32,108 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,783 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,380 |
| Counties of England | 0 | - | 4.97 | 801,289 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,039 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,926 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,120 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,288 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,842 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,237 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,616 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,209 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,967 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,949 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,642 |
| Slavic Countries | 0 | - | 4.96 | 112,188 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,132 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,250 |
| Russian History A-Z | 0 | - | 4.35 | 32,100 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,311 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,071 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,413 |
| Geography of Spain | 0 | - | 4.59 | 22,149 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,652 |
| Champions League Winners | 0 | - | 4.92 | 1,013,270 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,619 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,685 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,332 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,060 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,510 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,563 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,328 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,237 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,207 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,282 |
| Monarchies of Europe | 0 | - | 4.90 | 98,652 |
| European Countries with One Border | 0 | - | 4.97 | 183,510 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,250 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,278 |
| Albania Country Quiz | 0 | - | 4.54 | 39,182 |
| Russian Inventions | 0 | - | 4.39 | 13,005 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,927 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,688 |
| Romania Country Quiz | 0 | - | 4.63 | 54,030 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,327 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,163 |
| History of Austria | 0 | - | 4.70 | 17,952 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,364 |
| Geography of the French Empire | 0 | - | 4.45 | 27,194 |
| The French Revolution | 0 | - | 4.47 | 24,111 |
| Countries Bordering France | 0 | - | 4.83 | 404,356 |
| History of France | 0 | - | 4.61 | 57,465 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,551 |
| States of Germany | 0 | - | 4.95 | 154,000 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,542 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,536 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,338 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,922 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,375 |
| Regions of Italy | 0 | - | 4.92 | 76,696 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,651 |
| The Vikings! | 0 | - | 4.46 | 28,391 |
| The Portuguese Empire | 0 | - | 4.58 | 12,095 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,010 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,610 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,383 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,436 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,113 |
| Geography of the British Empire | 0 | - | 4.48 | 39,813 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,806 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,886 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,116 |
| South American Geography Quiz #2 | 0 | - | 4.41 | 43,426 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,821 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,293 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,718,927 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,572 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,629 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,572 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,286 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,629 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,788 |
| European Geographic Groups of Four | 0 | - | 4.54 | 19,632 |
| Topological Map of Mainland Europe | 0 | - | 4.39 | 29,006 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,301 |
| Lithuania Country Quiz | 0 | - | 4.63 | 31,754 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,156 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,874 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,836 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,516 |
| Departments of France | 0 | - | 4.93 | 54,860 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,073 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,387 |
| Germany Country Quiz | 0 | - | 4.83 | 158,572 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,901 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,096 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,174 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,005 |
| Counties of Ireland | 0 | - | 4.92 | 196,841 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,021 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,877 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,165 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,562 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,071 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,703 |
| Byzantine History | 0 | - | 4.91 | 28,989 |
| Byzantine Emperors | 0 | - | 4.92 | 14,503 |
| History of The Netherlands | 0 | - | 4.46 | 17,529 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,329 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,592 |
| Countries Closest to Spain | 0 | - | 4.96 | 227,807 |
| British Groups of Things | 0 | - | 4.25 | 82,975 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,085 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,464 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 131,976 |
| Medieval English History | 0 | - | 4.53 | 43,618 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,957 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,183 |
| England or Wales? | 0 | - | 4.94 | 45,897 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,644 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,778 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,453 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,573 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,338 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,942 |
| Name a Valid African Country | 0 | - | 4.98 | 154,802 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,307 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,335 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,331 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,810 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,699 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,270 |
| Which City in Europe? | 0 | - | 4.83 | 107,770 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,562 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,870 |
| Poland Country Quiz | 0 | - | 4.20 | 63,591 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,837 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 31,025 |
| Montenegro Country Quiz | 0 | - | 4.61 | 23,816 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,443 |
| French History Multiple Choice | 0 | - | 4.55 | 33,179 |
