| French Geography Quiz #1 | 0 | - | 4.89 | 34,751 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,327,555 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,665 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,141 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,989 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,958 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,354 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,318 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,095 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 80,771 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,529 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,887 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,775 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,902 |
| Countries That Border Russia | 0 | - | 4.98 | 461,512 |
| Europe Map Quiz | 0 | - | 5.00 | 4,759,953 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,247 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,915 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,200 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,218 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,020 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,629 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,958 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,649 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,574 |
| Russia Country Quiz | 0 | - | 4.85 | 114,406 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,307 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,324 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,463 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,966 |
| Countries that Border Poland | 0 | - | 4.99 | 172,202 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,805 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,679 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,168 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,348 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,217 |
| Name the English Monarchs | 0 | - | 4.91 | 502,228 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,941 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,843 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,779 |
| The Trojan War | 0 | - | 4.83 | 39,693 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,897 |
| Name that Greek Letter | 0 | - | 4.93 | 323,313 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,733 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,485 |
| Roman Emperors | 0 | - | 4.95 | 119,890 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,273 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,131 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,835 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,272 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,653 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,092 |
| The Only European Country ... | 0 | - | 4.91 | 216,392 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,996 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,456 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,811 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,791 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,242,541 |
| History of Russia Quiz | 0 | - | 4.47 | 31,905 |
| Ancient Greek Words | 0 | - | 4.93 | 111,507 |
| History of Italy | 0 | - | 4.55 | 31,962 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,645 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,210 |
| Counties of England | 0 | - | 4.97 | 795,978 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,838 |
| British History Quiz for Dummies | 0 | - | 4.70 | 78,548 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,427 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,960 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,588 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,119 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,493 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,083 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,294 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,338 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,181 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,018 |
| Slavic Countries | 0 | - | 4.96 | 111,590 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,996 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,972 |
| Russian History A-Z | 0 | - | 4.38 | 31,667 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,216 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 74,018 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,802 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,087 |
| Geography of Spain | 0 | - | 4.59 | 22,067 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,180 |
| Champions League Winners | 0 | - | 4.92 | 1,005,760 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,499 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,538 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,242 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,049 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,774 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,420 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,167 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,665 |
| Monarchies of Europe | 0 | - | 4.90 | 98,062 |
| European Countries with One Border | 0 | - | 4.97 | 182,678 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,485 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,173 |
| Albania Country Quiz | 0 | - | 4.54 | 38,968 |
| Russian Inventions | 0 | - | 4.39 | 12,949 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,187 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,404 |
| Romania Country Quiz | 0 | - | 4.63 | 53,738 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,835 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,015 |
| History of Austria | 0 | - | 4.70 | 17,854 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,308 |
| Geography of the French Empire | 0 | - | 4.45 | 27,047 |
| The French Revolution | 0 | - | 4.46 | 23,925 |
| Countries Bordering France | 0 | - | 4.83 | 402,350 |
| History of France | 0 | - | 4.59 | 56,932 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,719 |
| States of Germany | 0 | - | 4.96 | 152,336 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,976 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,230 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,766 |
| Regions of Italy | 0 | - | 4.92 | 75,791 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,074 |
| The Vikings! | 0 | - | 4.46 | 28,337 |
| The Portuguese Empire | 0 | - | 4.58 | 12,060 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,850 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,124 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,944 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,339 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,414 |
| Geography of the British Empire | 0 | - | 4.48 | 39,655 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,686 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,212 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,776 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,262 |
| Name a Valid African Country | 0 | - | 4.98 | 153,965 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,049 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,332 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,571 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,368 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,694,309 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,688 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,047 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,915 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,084 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,340 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,407 |
| Topological Map of Mainland Europe | 0 | - | 4.39 | 28,815 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,617 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,015 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,667 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,275 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,638 |
| Departments of France | 0 | - | 4.93 | 54,012 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,842 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,144 |
| Germany Country Quiz | 0 | - | 4.82 | 157,754 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,049 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,466 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,970 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,902 |
| Counties of Ireland | 0 | - | 4.92 | 195,057 |
| Italy Country Quiz | 0 | - | 4.82 | 123,330 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,272 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,944 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,835 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,299 |
| Countries Closest to Italy | 0 | - | 4.97 | 197,929 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,536 |
| Byzantine History | 0 | - | 4.91 | 28,818 |
| Byzantine Emperors | 0 | - | 4.94 | 13,527 |
| History of The Netherlands | 0 | - | 4.46 | 17,428 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,817 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,558 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,852 |
| British Groups of Things | 0 | - | 4.25 | 82,859 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,032 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,479 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,535 |
| Medieval English History | 0 | - | 4.53 | 43,496 |
| World Capitals Closest to London | 0 | - | 4.88 | 110,603 |
| 50 Busiest Air Routes from London | 0 | - | 4.87 | 96,781 |
| England or Wales? | 0 | - | 4.94 | 45,657 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,178 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 109,909 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,721 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,918 |
| Topological Map of Africa Quiz | 0 | - | 4.80 | 21,372 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,978 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,010 |
| Countries that Beat Canada | 0 | - | 4.90 | 94,618 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,200 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,651 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,815 |
| Which City in Europe? | 0 | - | 4.83 | 107,337 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,225 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,712 |
| Poland Country Quiz | 0 | - | 4.22 | 63,237 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,688 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 30,867 |
| Montenegro Country Quiz | 0 | - | 4.61 | 23,714 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,353 |
| French History Multiple Choice | 0 | - | 4.55 | 33,023 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,469 |
