| French Geography Quiz #1 | 0 | - | 4.89 | 34,704 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,845 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,435 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,032 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,887 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,862 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,260 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,848 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 76,092 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,244 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,679 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,571 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,203 |
| Countries That Border Russia | 0 | - | 4.98 | 461,014 |
| Europe Map Quiz | 0 | - | 5.00 | 4,754,345 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,197 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,855 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,143 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,171 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,496 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,225 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,591 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,790 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,282 |
| Russia Country Quiz | 0 | - | 4.85 | 114,242 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,216 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,280 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,380 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,724 |
| Countries that Border Poland | 0 | - | 4.99 | 172,022 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,700 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,074 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,225 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,064 |
| Name the English Monarchs | 0 | - | 4.91 | 501,292 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,359 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,790 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,727 |
| The Trojan War | 0 | - | 4.83 | 39,638 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,913 |
| Name that Greek Letter | 0 | - | 4.93 | 323,028 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,497 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,398 |
| Roman Emperors | 0 | - | 4.95 | 119,625 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,124 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,078 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,454 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,872 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,599 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,764 |
| The Only European Country ... | 0 | - | 4.91 | 215,894 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,703 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,248 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,422 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,454 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,644 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,239,335 |
| History of Russia Quiz | 0 | - | 4.49 | 31,878 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 30,815 |
| Ancient Greek Words | 0 | - | 4.93 | 111,302 |
| History of Italy | 0 | - | 4.55 | 31,930 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,606 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,156 |
| Counties of England | 0 | - | 4.97 | 794,496 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,783 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,451 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 354,032 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,930 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,388 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,933 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,078 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,952 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,904 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,458 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,958 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,688 |
| Slavic Countries | 0 | - | 4.96 | 111,452 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,953 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,877 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,185 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,489 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,984 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,983 |
| Geography of Spain | 0 | - | 4.59 | 22,044 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,042 |
| Champions League Winners | 0 | - | 4.92 | 1,003,454 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,465 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,489 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,220 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,900 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,645 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,204 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,866 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,470 |
| Monarchies of Europe | 0 | - | 4.90 | 97,918 |
| European Countries with One Border | 0 | - | 4.97 | 182,465 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,275 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 77,862 |
| Albania Country Quiz | 0 | - | 4.54 | 38,905 |
| Russian Inventions | 0 | - | 4.39 | 12,938 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,111 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,600 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,314 |
| Romania Country Quiz | 0 | - | 4.63 | 53,672 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,696 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,964 |
| History of Austria | 0 | - | 4.70 | 17,831 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,089 |
| Geography of the French Empire | 0 | - | 4.45 | 27,019 |
| The French Revolution | 0 | - | 4.46 | 23,896 |
| Countries Bordering France | 0 | - | 4.83 | 401,788 |
| History of France | 0 | - | 4.59 | 56,799 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,492 |
| States of Germany | 0 | - | 4.96 | 151,769 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,460 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,852 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,519 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,361 |
| Regions of Italy | 0 | - | 4.92 | 75,503 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,769 |
| The Vikings! | 0 | - | 4.46 | 28,317 |
| The Portuguese Empire | 0 | - | 4.58 | 12,045 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,595 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,967 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,515 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,303 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,276 |
| Geography of the British Empire | 0 | - | 4.48 | 39,627 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,655 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,007 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,577 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,029 |
| Name a Valid African Country | 0 | - | 4.98 | 153,708 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,031 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,303 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,553 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,151 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,686,887 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,470 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,840 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,746 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,028 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,265 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,330 |
| Topological Map of Mainland Europe | 0 | - | 4.39 | 28,768 |
| Russian History A-Z | 0 | - | 4.38 | 31,568 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,120 |
| Latvia Country Quiz | 0 | - | 4.75 | 31,953 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,167 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,394 |
| Departments of France | 0 | - | 4.93 | 53,720 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,776 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,076 |
| Germany Country Quiz | 0 | - | 4.82 | 157,522 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,844 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 95,999 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,928 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,874 |
| Counties of Ireland | 0 | - | 4.92 | 194,549 |
| Italy Country Quiz | 0 | - | 4.82 | 123,152 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,068 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,786 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,735 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,235 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,669 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,511 |
| Byzantine History | 0 | - | 4.91 | 28,749 |
| History of The Netherlands | 0 | - | 4.46 | 17,403 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,638 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,330 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,554 |
| British Groups of Things | 0 | - | 4.25 | 82,827 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,012 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,176 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,060 |
| Medieval English History | 0 | - | 4.53 | 43,450 |
| World Capitals Closest to London | 0 | - | 4.87 | 110,207 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,660 |
| England or Wales? | 0 | - | 4.94 | 45,589 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,681 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,630 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,309 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,717 |
| Topological Map of Africa Quiz | 0 | - | 4.80 | 21,337 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,489 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,906 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,267 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,181 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,640 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,315 |
| Which City in Europe? | 0 | - | 4.83 | 107,134 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,142 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,668 |
| Poland Country Quiz | 0 | - | 4.22 | 63,145 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,623 |
| Montenegro Country Quiz | 0 | - | 4.60 | 23,672 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,326 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,609 |
| French History Multiple Choice | 0 | - | 4.55 | 32,995 |
| Countries that Beat Germany | 0 | - | 4.95 | 106,074 |
