| French Geography Quiz #1 | 0 | - | 4.89 | 35,094 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,335,921 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,623 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,715 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,568 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,456 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,827 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,404 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,513 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,814 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,876 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,608 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,568 |
| Countries That Border Russia | 0 | - | 4.98 | 464,558 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,587 |
| Europe Map Quiz | 0 | - | 5.00 | 4,788,977 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,533 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,189 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,468 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,434 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,929 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,966 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,975 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,726 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,918 |
| Russia Country Quiz | 0 | - | 4.83 | 115,328 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,757 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,596 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,755 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,106 |
| Countries that Border Poland | 0 | - | 4.99 | 173,194 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,283 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,994 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,016 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,110 |
| Name the English Monarchs | 0 | - | 4.91 | 506,572 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,974 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,050 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,033 |
| The Trojan War | 0 | - | 4.83 | 39,997 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,093 |
| Name that Greek Letter | 0 | - | 4.93 | 325,021 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,989 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,601 |
| Roman Emperors | 0 | - | 4.95 | 121,238 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,892 |
| Topological Map of Asia Quiz | 0 | - | 4.82 | 20,457 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,867 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,288 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,901 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,191 |
| The Only European Country ... | 0 | - | 4.91 | 219,116 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,572 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,844 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,595 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,238 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,258,616 |
| History of Russia Quiz | 0 | - | 4.47 | 32,007 |
| Ancient Greek Words | 0 | - | 4.93 | 112,506 |
| History of Italy | 0 | - | 4.55 | 32,154 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,827 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,428 |
| Counties of England | 0 | - | 4.97 | 803,122 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,102 |
| British History Quiz for Dummies | 0 | - | 4.70 | 79,069 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,847 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,562 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,099 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,874 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,791 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,829 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,947 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,207 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,810 |
| Slavic Countries | 0 | - | 4.96 | 112,397 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,198 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,346 |
| Russian History A-Z | 0 | - | 4.35 | 32,233 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,350 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 75,405 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,888 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,512 |
| Geography of Spain | 0 | - | 4.59 | 22,186 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,841 |
| Champions League Winners | 0 | - | 4.92 | 1,016,407 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,662 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,739 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,364 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,099 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,688 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,985 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,838 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,551 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,624 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,493 |
| Monarchies of Europe | 0 | - | 4.90 | 98,894 |
| European Countries with One Border | 0 | - | 4.97 | 183,832 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,567 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,901 |
| Albania Country Quiz | 0 | - | 4.54 | 39,260 |
| Russian Inventions | 0 | - | 4.39 | 13,018 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,465 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,791 |
| Romania Country Quiz | 0 | - | 4.63 | 54,143 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,482 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,217 |
| History of Austria | 0 | - | 4.70 | 17,976 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,669 |
| Geography of the French Empire | 0 | - | 4.45 | 27,220 |
| The French Revolution | 0 | - | 4.47 | 24,149 |
| Countries Bordering France | 0 | - | 4.83 | 404,975 |
| History of France | 0 | - | 4.61 | 57,633 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,825 |
| States of Germany | 0 | - | 4.95 | 154,570 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,560 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,709 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,911 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,972 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,897 |
| Regions of Italy | 0 | - | 4.92 | 77,113 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,817 |
| The Vikings! | 0 | - | 4.46 | 28,408 |
| The Portuguese Empire | 0 | - | 4.58 | 12,107 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,354 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,777 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,536 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,466 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,270 |
| Geography of the British Empire | 0 | - | 4.48 | 39,849 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 136,130 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,136 |
| South American Geography Quiz #2 | 0 | - | 4.41 | 44,161 |
| South American Geography Quiz #1 | 0 | - | 4.63 | 32,911 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,579 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,726,761 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,814 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,920 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,820 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,362 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,743 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,966 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,256 |
| Topological Map of Mainland Europe | 0 | - | 4.39 | 29,075 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,915 |
| Lithuania Country Quiz | 0 | - | 4.63 | 31,801 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,209 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,942 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,957 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,835 |
| Departments of France | 0 | - | 4.93 | 55,183 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,155 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,489 |
| Germany Country Quiz | 0 | - | 4.82 | 158,865 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,088 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,702 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,245 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,050 |
| Counties of Ireland | 0 | - | 4.92 | 197,375 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,264 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,075 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,265 |
| Countries Italy Declared War On | 0 | - | 4.75 | 44,129 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,414 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,749 |
| Byzantine History | 0 | - | 4.91 | 29,025 |
| Byzantine Emperors | 0 | - | 4.93 | 14,605 |
| History of The Netherlands | 0 | - | 4.46 | 17,556 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,514 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,887 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,154 |
| British Groups of Things | 0 | - | 4.26 | 83,021 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,113 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,812 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,426 |
| Medieval English History | 0 | - | 4.53 | 43,659 |
| World Capitals Closest to London | 0 | - | 4.88 | 111,079 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 97,316 |
| England or Wales? | 0 | - | 4.94 | 45,975 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,196 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,392 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,756 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,808 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,562 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,454 |
| Name a Valid African Country | 0 | - | 4.98 | 155,060 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,697 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,427 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,018 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.75 | 12,341 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,721 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,430 |
| Which City in Europe? | 0 | - | 4.83 | 107,908 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,689 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,920 |
| Poland Country Quiz | 0 | - | 4.20 | 63,742 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,879 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 31,076 |
| Montenegro Country Quiz | 0 | - | 4.61 | 23,867 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,471 |
