| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,447 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,711 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,468 |
| Countries That Border Russia | 0 | - | 4.98 | 464,478 |
| Ancient Greek Words | 0 | - | 4.93 | 112,450 |
| Russia Country Quiz | 0 | - | 4.83 | 115,310 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,496 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,258 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,593 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,963 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,072 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,362 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,374 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,756 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,827 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,567 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,786 |
| States of Germany | 0 | - | 4.95 | 154,462 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,684 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,825 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,189 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,335 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,736 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,582 |
| Germany Country Quiz | 0 | - | 4.82 | 158,830 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,614 |
| Name the English Monarchs | 0 | - | 4.91 | 506,342 |
| Europe Map Quiz | 0 | - | 5.00 | 4,787,873 |
| Countries that Border Poland | 0 | - | 4.99 | 173,158 |
| Russian History A-Z | 0 | - | 4.35 | 32,218 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,826 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,002 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,082 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,617 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,863 |
| Name that Greek Letter | 0 | - | 4.93 | 324,969 |
| Famous Ancient Romans | 0 | - | 4.70 | 85,775 |
| Iceland... or Ireland? | 0 | - | 4.74 | 57,234 |
| Roman History Vocabulary | 0 | - | 4.41 | 57,717 |
| Prime Ministers of the UK | 0 | - | 4.95 | 442,281 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,849 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,748 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,809 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,042 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,025 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,559 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,306 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,551 |
| The Trojan War | 0 | - | 4.83 | 39,986 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,946 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,534 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,585 |
| Roman Emperors | 0 | - | 4.95 | 121,189 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,775 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,775 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,219 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,091 |
| The Only European Country ... | 0 | - | 4.91 | 218,982 |
| European Countries NOT in NATO | 0 | - | 4.90 | 62,494 |
| Germany A-Z | 0 | - | 4.56 | 62,862 |
| History of Germany | 0 | - | 4.39 | 52,970 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 108,962 |
| Mythology A-Z | 0 | - | 4.31 | 37,395 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,840 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,323 |
| Roman History by Picture | 0 | - | 4.46 | 26,585 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,769 |
| Count in Roman Numerals - 30 Second Sprint | 0 | - | 4.27 | 103,913 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,810 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,304 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,790 |
| People Buried at Westminster Abbey | 0 | - | 4.67 | 14,332 |
| Premier League Relegated Teams | 0 | - | 4.81 | 127,851 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,257,891 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,335,598 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,500 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,047 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,761 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,766 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,739 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,722 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,170 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,784 |
| Slavic Countries | 0 | - | 4.96 | 112,363 |
| History of Russia Quiz | 0 | - | 4.47 | 32,005 |
| Holy Roman Empire Countries | 0 | - | 4.77 | 54,911 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,831 |
| History of Italy | 0 | - | 4.55 | 32,143 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,818 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,423 |
| Counties of England | 0 | - | 4.97 | 802,839 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,094 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,811 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,652 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,625 |
| Champions League Winners | 0 | - | 4.92 | 1,016,035 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,870 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,870 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,786 |
| European Diaspora - Top 11 Countries | 0 | - | 4.88 | 96,591 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,487 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,572 |
| Which European Country - Multiple Choice | 0 | - | 4.51 | 84,586 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,465 |
| Monarchies of Europe | 0 | - | 4.90 | 98,868 |
| European Countries with One Border | 0 | - | 4.97 | 183,791 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,524 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,834 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,894 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,762 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,906 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 264,599 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,872 |
| Albania Country Quiz | 0 | - | 4.54 | 39,249 |
| Russian Inventions | 0 | - | 4.39 | 13,018 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,455 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,980 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,777 |
| Romania Country Quiz | 0 | - | 4.63 | 54,132 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,469 |
| Lithuania Country Quiz | 0 | - | 4.63 | 31,792 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,203 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,209 |
| History of Austria | 0 | - | 4.70 | 17,971 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,933 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,638 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,796 |
| Departments of France | 0 | - | 4.93 | 55,152 |
| Geography of the French Empire | 0 | - | 4.45 | 27,216 |
| The French Revolution | 0 | - | 4.47 | 24,146 |
| Countries Bordering France | 0 | - | 4.83 | 404,884 |
| History of France | 0 | - | 4.61 | 57,604 |
| Most Popular Baby Girls Names in Germany | 0 | - | 4.51 | 38,988 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,064 |
| German History A-Z | 0 | - | 4.49 | 24,915 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,234 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,042 |
| Regions of Italy | 0 | - | 4.92 | 77,065 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,230 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,042 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,647 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,737 |
| Byzantine History | 0 | - | 4.91 | 29,021 |
| Byzantine Emperors | 0 | - | 4.93 | 14,593 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,793 |
| The Vikings! | 0 | - | 4.46 | 28,405 |
| The Portuguese Empire | 0 | - | 4.58 | 12,106 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,487 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,308 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,856 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,753 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,520 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,745 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,462 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,247 |
| Geography of the British Empire | 0 | - | 4.48 | 39,845 |
| Medieval English History | 0 | - | 4.53 | 43,655 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,841 |
| England or Wales? | 0 | - | 4.94 | 45,967 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,111 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,522 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,850 |
| Red State or Blue State Trait? | 0 | - | 4.42 | 55,693 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,725,511 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,776 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,352 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,725 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,936 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,072 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,449 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,082 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,945 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,146 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,471 |
| France True or False? | 0 | - | 4.44 | 40,075 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,696 |
| French History Multiple Choice | 0 | - | 4.55 | 33,230 |
| Bundesliga Champions | 0 | - | 4.25 | 57,301 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 47,544 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,299 |
| Counties of Ireland | 0 | - | 4.92 | 197,300 |
| Italy A-Z | 0 | - | 4.49 | 58,751 |
| Countries Bordering Italy | 0 | - | 4.94 | 101,251 |
| Countries that Beat Italy | 0 | - | 4.85 | 55,167 |
| Countries Closest to Italy | 0 | - | 4.97 | 199,375 |
| Ancient Roman Trivia #2 | 0 | - | 4.61 | 44,284 |
| Geography of the Roman Empire | 0 | - | 4.55 | 52,205 |
| Roman Names for Places | 0 | - | 4.62 | 58,700 |
| History of The Netherlands | 0 | - | 4.46 | 17,552 |
| Greenland... or Iceland? | 0 | - | 4.50 | 43,847 |
| Countries Closest to Iceland | 0 | - | 4.90 | 74,146 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,874 |
| Geography of the Spanish Empire | 0 | - | 4.49 | 37,313 |
| Countries Closest to Spain | 0 | - | 4.96 | 228,114 |
| Countries that Beat Spain | 0 | - | 4.94 | 63,344 |
| Counties of the UK and Ireland | 0 | - | 4.98 | 132,361 |
| Roald Dahl Books | 0 | - | 4.45 | 34,127 |
| Do You Even Know Anything About Shakespeare? | 0 | - | 4.56 | 34,495 |
| Middle Earth Geography | 0 | - | 4.56 | 39,952 |
| Lord of the Rings Trivia | 0 | - | 4.53 | 81,780 |
