| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,005 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,802 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,133 |
| Countries That Border Russia | 0 | - | 4.98 | 461,719 |
| Ancient Greek Words | 0 | - | 4.93 | 111,595 |
| Russia Country Quiz | 0 | - | 4.85 | 114,480 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,130 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,845 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,785 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,532 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,234 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 81,757 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,665 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,995 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,878 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,807 |
| States of Germany | 0 | - | 4.96 | 152,560 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,031 |
| Countries Bordering Germany | 0 | - | 4.99 | 369,393 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,009 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,004 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,336 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,342 |
| Germany Country Quiz | 0 | - | 4.83 | 157,840 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,300 |
| Name the English Monarchs | 0 | - | 4.91 | 502,614 |
| Europe Map Quiz | 0 | - | 5.00 | 4,762,768 |
| Countries that Border Poland | 0 | - | 4.99 | 172,272 |
| Russian History A-Z | 0 | - | 4.38 | 31,711 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,816 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,220 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,392 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,672 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,389 |
| Name that Greek Letter | 0 | - | 4.93 | 323,443 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,469 |
| Iceland... or Ireland? | 0 | - | 4.74 | 57,035 |
| Prime Ministers of the UK | 0 | - | 4.95 | 438,933 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,176 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,490 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,392 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,872 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,803 |
| Countries that Beat Germany | 0 | - | 4.94 | 106,420 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,035 |
| The Trojan War | 0 | - | 4.83 | 39,724 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,835 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,963 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,525 |
| Roman Emperors | 0 | - | 4.95 | 120,036 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,349 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,016 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,447 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,229 |
| The Only European Country ... | 0 | - | 4.91 | 216,603 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,117 |
| Germany A-Z | 0 | - | 4.56 | 62,605 |
| History of Germany | 0 | - | 4.39 | 52,818 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,612 |
| Mythology A-Z | 0 | - | 4.31 | 37,217 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,658 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.80 | 20,786 |
| Roman History Vocabulary | 0 | - | 4.40 | 57,603 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,873 |
| Roman History by Picture | 0 | - | 4.46 | 26,465 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,091 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.26 | 102,885 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,257 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,254 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,706 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,253 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,244,029 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,328,648 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,654 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,200 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,692 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,149 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,502 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,826 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,278 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,184 |
| Slavic Countries | 0 | - | 4.96 | 111,653 |
| History of Russia Quiz | 0 | - | 4.47 | 31,917 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,477 |
| Holy Roman Empire Countries | 0 | - | 4.77 | 54,794 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,942 |
| History of Italy | 0 | - | 4.55 | 31,973 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,659 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,235 |
| Counties of England | 0 | - | 4.97 | 796,656 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,862 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,661 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,609 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,930 |
| Champions League Winners | 0 | - | 4.92 | 1,006,652 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,859 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,111 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,996 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,851 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,515 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,296 |
| Which European Country - Multiple Choice | 0 | - | 4.51 | 84,379 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,753 |
| Monarchies of Europe | 0 | - | 4.90 | 98,140 |
| European Countries with One Border | 0 | - | 4.97 | 182,771 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,570 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,242 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,807 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,541 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,118 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 260,985 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,708 |
| Albania Country Quiz | 0 | - | 4.54 | 39,001 |
| Russian Inventions | 0 | - | 4.39 | 12,959 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,216 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,703 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,433 |
| Romania Country Quiz | 0 | - | 4.63 | 53,777 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,893 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,034 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,037 |
| History of Austria | 0 | - | 4.70 | 17,861 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,683 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,425 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,737 |
| Departments of France | 0 | - | 4.93 | 54,096 |
| Geography of the French Empire | 0 | - | 4.45 | 27,059 |
| The French Revolution | 0 | - | 4.47 | 23,929 |
| Countries Bordering France | 0 | - | 4.83 | 402,529 |
| History of France | 0 | - | 4.59 | 56,974 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,796 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,319 |
| German History A-Z | 0 | - | 4.49 | 24,605 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,993 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,913 |
| Regions of Italy | 0 | - | 4.92 | 75,863 |
| Italy Country Quiz | 0 | - | 4.80 | 123,396 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,360 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,036 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,327 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,545 |
| Byzantine History | 0 | - | 4.91 | 28,867 |
| Byzantine Emperors | 0 | - | 4.92 | 14,087 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,147 |
| The Vikings! | 0 | - | 4.46 | 28,343 |
| The Portuguese Empire | 0 | - | 4.58 | 12,064 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,923 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,932 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,644 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,203 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 93,995 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,600 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,350 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,467 |
| Geography of the British Empire | 0 | - | 4.48 | 39,671 |
| Medieval English History | 0 | - | 4.53 | 43,507 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,698 |
| England or Wales? | 0 | - | 4.94 | 45,686 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,339 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,728 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,368 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,698,440 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,792 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,105 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,382 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,440 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,052 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,376 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,768 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,314 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,870 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,177 |
| France True or False? | 0 | - | 4.44 | 39,932 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,197 |
| French History Multiple Choice | 0 | - | 4.55 | 33,037 |
| Bundesliga Champions | 0 | - | 4.25 | 56,510 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 45,534 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,659 |
| Counties of Ireland | 0 | - | 4.92 | 195,258 |
| Italy A-Z | 0 | - | 4.49 | 58,304 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,862 |
| Countries that Beat Italy | 0 | - | 4.85 | 54,482 |
| Countries Closest to Italy | 0 | - | 4.97 | 198,035 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,743 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,925 |
| Roman Names for Places | 0 | - | 4.62 | 58,282 |
| History of The Netherlands | 0 | - | 4.46 | 17,433 |
| Greenland... or Iceland? | 0 | - | 4.50 | 43,774 |
| Countries Closest to Iceland | 0 | - | 4.90 | 73,576 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,340 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,163 |
| Countries Closest to Spain | 0 | - | 4.96 | 226,973 |
| Countries that Beat Spain | 0 | - | 4.94 | 62,938 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 130,684 |
| Roald Dahl Books | 0 | - | 4.44 | 34,052 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.57 | 34,372 |
| Middle Earth Geography | 0 | - | 4.56 | 39,810 |
| Lord of the Rings Trivia | 0 | - | 4.53 | 81,469 |
| Members of the Fellowship of the Ring | 0 | - | 4.74 | 45,829 |
| A Quiz About The Beatles | 0 | - | 4.56 | 47,949 |
