| Monarchies of Europe | 0 | - | 4.90 | 97,337 |
| Name the English Monarchs | 0 | - | 4.92 | 498,008 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,341 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,282 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,969 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,441 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,128 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,026 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,528 |
| Monarchies of Asia | 0 | - | 4.97 | 70,611 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,828 |
| Countries That Border Russia | 0 | - | 4.98 | 458,958 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,264 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,132 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,152 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,586 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,199 |
| Russia Country Quiz | 0 | - | 4.85 | 113,650 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,860 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,041 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,274 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,248 |
| Countries that Border Poland | 0 | - | 4.99 | 171,374 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,384 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,707 |
| Romania Country Quiz | 0 | - | 4.63 | 53,360 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,768 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,912 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,621 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,544 |
| Kings of France Quiz | 0 | - | 4.20 | 32,558 |
| The Trojan War | 0 | - | 4.83 | 39,436 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 642,009 |
| Name that Greek Letter | 0 | - | 4.94 | 321,706 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,551 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,058 |
| Roman Emperors | 0 | - | 4.95 | 118,502 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,032 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,341 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,593 |
| The Only European Country ... | 0 | - | 4.91 | 213,888 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,573 |
| History of Russia Quiz | 0 | - | 4.49 | 31,795 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,914 |
| History of Italy | 0 | - | 4.55 | 31,819 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,486 |
| History of The Netherlands | 0 | - | 4.46 | 17,314 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,984 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,426 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,300 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,956 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,226,993 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,958 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 191,725 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,301 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,376 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,481 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,875 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,961 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,279 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,214 |
| Slavic Countries | 0 | - | 4.96 | 110,873 |
| Russian History A-Z | 0 | - | 4.38 | 30,859 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,266 |
| Ancient Greek Words | 0 | - | 4.92 | 110,713 |
| Counties of England | 0 | - | 4.97 | 789,344 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 350,018 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,420 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,921 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,870 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,728 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,234 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,917 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,684 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,639 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,031 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,321 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,609 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,750 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,802 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,573 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,984 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,602 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,624 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,051 |
| British History A-Z #1 | 0 | - | 4.45 | 45,860 |
| Champions League Winners | 0 | - | 4.92 | 996,533 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,348 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,053 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 136,414 |
| Three Band Flags of Europe | 0 | - | 4.98 | 191,887 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,231 |
| Pixelated Europe Map | 0 | - | 4.88 | 121,835 |
| European Countries with One Border | 0 | - | 4.97 | 181,647 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 178,544 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,814 |
| Albania Country Quiz | 0 | - | 4.54 | 38,662 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,867 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,322 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,043 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,220 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,772 |
| History of Austria | 0 | - | 4.70 | 17,754 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,162 |
| Geography of the French Empire | 0 | - | 4.48 | 26,938 |
| The French Revolution | 0 | - | 4.46 | 23,785 |
| Countries Bordering France | 0 | - | 4.83 | 399,261 |
| History of France | 0 | - | 4.59 | 56,074 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,712 |
| States of Germany | 0 | - | 4.96 | 150,112 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,386 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,030 |
| Countries Bordering Germany | 0 | - | 4.99 | 367,088 |
| Regions of Italy | 0 | - | 4.92 | 74,737 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,828 |
| The Vikings! | 0 | - | 4.46 | 28,246 |
| The Portuguese Empire | 0 | - | 4.54 | 11,993 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,378 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,205 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,953 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,229 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,465 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,335 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,183 |
| English Royal Consorts | 0 | - | 4.37 | 37,167 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,792 |
| Geography of the British Empire | 0 | - | 4.48 | 39,477 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,616 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,442 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,005 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,435 |
| Battle to Country | 0 | - | 4.91 | 52,536 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,912 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,108 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,097 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,530 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,230 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,675 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,914 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,291 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,502 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,180 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,931 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,302 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,521 |
| European Geography A-Z | 0 | - | 4.28 | 49,008 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,247 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,855 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,273 |
| Latvia Country Quiz | 0 | - | 4.75 | 31,776 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,221 |
| Departments of France | 0 | - | 4.93 | 52,845 |
| Germany Country Quiz | 0 | - | 4.82 | 156,582 |
| Germany Cities Map Quiz | 0 | - | 4.86 | 125,165 |
| German History A-Z | 0 | - | 4.49 | 24,249 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,781 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,774 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,986 |
| Italy Country Quiz | 0 | - | 4.82 | 122,230 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,410 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,092 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,962 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,372 |
| Byzantine History | 0 | - | 4.91 | 28,625 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 95,962 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,657 |
| British Acronyms | 0 | - | 4.39 | 45,621 |
| British Monopoly Board | 0 | - | 4.52 | 41,037 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,310 |
| Medieval English History | 0 | - | 4.53 | 43,324 |
| England or Wales? | 0 | - | 4.94 | 45,326 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,520 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,504 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,736 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,577 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,108 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,655,179 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,093 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 70,795 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,601 |
| Top 10 European Countries by Coastline | 0 | - | 4.89 | 137,863 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,075 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,849 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,986 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 63,788 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,481 |
| Poland Country Quiz | 0 | - | 4.22 | 62,685 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,521 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,558 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,438 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 30,669 |
| Montenegro Country Quiz | 0 | - | 4.60 | 23,541 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,223 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,520 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,403 |
| Countries Bordering Austria | 0 | - | 4.97 | 117,786 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,539 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 71,810 |
| Countries that Beat Germany | 0 | - | 4.95 | 105,396 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 94,372 |
