| Name the English Monarchs | 0 | - | 4.91 | 505,524 |
| Monarchies of Europe | 0 | - | 4.90 | 98,677 |
| Russia Country Quiz | 0 | - | 4.83 | 115,157 |
| Countries That Border Russia | 0 | - | 4.98 | 463,989 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 102,348 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,417 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,346 |
| Russian History A-Z | 0 | - | 4.35 | 32,113 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,578 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,310 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,108 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,759 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,522 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,650 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,410 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,985 |
| Monarchies of Asia | 0 | - | 4.97 | 71,407 |
| Europe Map Quiz | 0 | - | 5.00 | 4,781,356 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,913 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,883 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,665 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,598 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,698 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,198 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,480 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,587 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,279 |
| Countries that Border Poland | 0 | - | 4.99 | 172,977 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,149 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,930 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,288 |
| Kings of France Quiz | 0 | - | 4.20 | 32,882 |
| The Trojan War | 0 | - | 4.83 | 39,937 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,825 |
| Name that Greek Letter | 0 | - | 4.93 | 324,714 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,703 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,498 |
| Roman Emperors | 0 | - | 4.95 | 120,927 |
| English Royal Consorts | 0 | - | 4.38 | 37,489 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,332 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,780 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,780 |
| The Only European Country ... | 0 | - | 4.91 | 218,431 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,194 |
| History of Russia Quiz | 0 | - | 4.47 | 31,987 |
| History of Italy | 0 | - | 4.55 | 32,113 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,785 |
| History of The Netherlands | 0 | - | 4.46 | 17,530 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,388 |
| Invasions of Great Britain | 0 | - | 4.51 | 60,049 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,679 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,254,195 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,333,927 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,309 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,857 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,293 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,625 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,238 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,064 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,966 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,651 |
| Slavic Countries | 0 | - | 4.96 | 112,200 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,076 |
| Ancient Greek Words | 0 | - | 4.93 | 112,274 |
| Counties of England | 0 | - | 4.97 | 801,432 |
| The Reign of Queen Elizabeth II | 0 | - | 4.36 | 35,953 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 360,251 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,690 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,072 |
| European Geography By Letter - C | 0 | - | 4.43 | 123,034 |
| European Geography By Letter - D | 0 | - | 4.50 | 110,079 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,738 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,081 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,864 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,380 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,594 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,291 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,211 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,138 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,137 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,256 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,326 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,215 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,144 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,418 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,383 |
| The Reign of Henry VIII | 0 | - | 4.25 | 27,835 |
| British History A-Z #1 | 0 | - | 4.45 | 47,116 |
| Elizabeth I... or Elizabeth II? | 0 | - | 4.30 | 24,553 |
| Champions League Winners | 0 | - | 4.92 | 1,013,569 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,623 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,345 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,258 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,245 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,632 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,299 |
| European Countries with One Border | 0 | - | 4.97 | 183,533 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,282 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,733 |
| Albania Country Quiz | 0 | - | 4.54 | 39,186 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,342 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,169 |
| History of Austria | 0 | - | 4.70 | 17,956 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,385 |
| Geography of the French Empire | 0 | - | 4.45 | 27,198 |
| The French Revolution | 0 | - | 4.47 | 24,117 |
| Countries Bordering France | 0 | - | 4.83 | 404,421 |
| History of France | 0 | - | 4.61 | 57,483 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,574 |
| States of Germany | 0 | - | 4.95 | 154,058 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,545 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,555 |
| Countries Bordering Germany | 0 | - | 4.99 | 371,391 |
| Regions of Italy | 0 | - | 4.92 | 76,743 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,665 |
| The Vikings! | 0 | - | 4.46 | 28,394 |
| The Portuguese Empire | 0 | - | 4.58 | 12,096 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,054 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,626 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,393 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,280 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,440 |
| Countries the UK Declared War On | 0 | - | 4.55 | 123,129 |
| Geography of the British Empire | 0 | - | 4.48 | 39,819 |
| The Reign of Queen Victoria | 0 | - | 4.34 | 23,527 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,811 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,892 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,202 |
| Battle to Country | 0 | - | 4.91 | 53,776 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,652 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,052 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,811 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,115 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,919 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,626 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,314 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,952 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,363 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,418 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,708 |
| European Geography A-Z | 0 | - | 4.29 | 49,439 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,501 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 263,828 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,641 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,636 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,511 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,879 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,539 |
| Departments of France | 0 | - | 4.93 | 54,886 |
| Germany Country Quiz | 0 | - | 4.82 | 158,599 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,925 |
| German History A-Z | 0 | - | 4.49 | 24,865 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,178 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,008 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,925 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,418 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,037 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,888 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,566 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,707 |
| Byzantine History | 0 | - | 4.91 | 28,995 |
| Byzantine Emperors | 0 | - | 4.93 | 14,518 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,340 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,637 |
| British Acronyms | 0 | - | 4.40 | 45,904 |
| British Monopoly Board | 0 | - | 4.52 | 41,241 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,488 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,059 |
| Medieval English History | 0 | - | 4.53 | 43,620 |
| England or Wales? | 0 | - | 4.94 | 45,903 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,690 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,649 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,814 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,478 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,351 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,966 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,310 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.94 | 90,451 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,719,470 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,294 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,703 |
| Top 10 European Countries by Coastline | 0 | - | 4.88 | 138,638 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,304 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,802 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,826 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,570 |
| Poland Country Quiz | 0 | - | 4.20 | 63,606 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,904 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,996 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,977 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,015 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,850 |
| Countries that Visit France the Most | 0 | - | 4.85 | 46,082 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,400 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,589 |
| Countries that Beat Germany | 0 | - | 4.94 | 107,122 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 98,158 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,450 |
| History of Germany | 0 | - | 4.39 | 52,945 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 74,165 |
