| Monarchies of Europe | 0 | - | 4.90 | 98,326 |
| Name the English Monarchs | 0 | - | 4.91 | 503,785 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,173 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 85,265 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,699 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,216 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,048 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,288 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,934 |
| Monarchies of Asia | 0 | - | 4.97 | 71,204 |
| Europe Map Quiz | 0 | - | 5.00 | 4,769,873 |
| Countries That Border Russia | 0 | - | 4.98 | 462,743 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 193,285 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 127,222 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,566 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,840 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,568 |
| Russia Country Quiz | 0 | - | 4.83 | 114,676 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,455 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,408 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,043 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,931 |
| Countries that Border Poland | 0 | - | 4.99 | 172,573 |
| Russian History A-Z | 0 | - | 4.35 | 31,837 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,965 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,398 |
| Romania Country Quiz | 0 | - | 4.63 | 53,887 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,641 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,039 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,920 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,876 |
| Kings of France Quiz | 0 | - | 4.20 | 32,809 |
| The Trojan War | 0 | - | 4.83 | 39,793 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,691 |
| Name that Greek Letter | 0 | - | 4.93 | 324,121 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,200 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,640 |
| Roman Emperors | 0 | - | 4.95 | 120,365 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,503 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,972 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,634 |
| The Only European Country ... | 0 | - | 4.91 | 217,319 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,525 |
| History of Russia Quiz | 0 | - | 4.47 | 31,946 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,524 |
| History of Italy | 0 | - | 4.55 | 32,048 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,716 |
| History of The Netherlands | 0 | - | 4.46 | 17,476 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,292 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,947 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,929 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,838 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,755 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,466 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,248,008 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,330,490 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,892 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,406 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,301 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,337 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,146 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,797 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,531 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,371 |
| Slavic Countries | 0 | - | 4.96 | 111,863 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,756 |
| Ancient Greek Words | 0 | - | 4.93 | 111,875 |
| Counties of England | 0 | - | 4.97 | 798,625 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 357,959 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,829 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,236 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,603 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,169 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,894 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,189 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,839 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,122 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,936 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,225 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,753 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,823 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 35,045 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,071 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,115 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,169 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,879 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,265 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,335 |
| British History A-Z #1 | 0 | - | 4.45 | 46,570 |
| Champions League Winners | 0 | - | 4.92 | 1,009,522 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,717 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,026 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,813 |
| Three Band Flags of Europe | 0 | - | 4.98 | 193,658 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,361 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,965 |
| European Countries with One Border | 0 | - | 4.97 | 183,090 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,866 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,258 |
| Albania Country Quiz | 0 | - | 4.54 | 39,069 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,273 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,791 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,532 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,075 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,088 |
| History of Austria | 0 | - | 4.70 | 17,900 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,768 |
| Geography of the French Empire | 0 | - | 4.45 | 27,152 |
| The French Revolution | 0 | - | 4.47 | 24,054 |
| Countries Bordering France | 0 | - | 4.83 | 403,456 |
| History of France | 0 | - | 4.59 | 57,251 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,120 |
| States of Germany | 0 | - | 4.95 | 153,098 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,256 |
| Countries Bordering Germany | 0 | - | 4.99 | 370,571 |
| Regions of Italy | 0 | - | 4.92 | 76,202 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,399 |
| The Vikings! | 0 | - | 4.46 | 28,368 |
| The Portuguese Empire | 0 | - | 4.58 | 12,081 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,335 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,382 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,132 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,145 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,544 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,398 |
| English Royal Consorts | 0 | - | 4.38 | 37,404 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,643 |
| Geography of the British Empire | 0 | - | 4.48 | 39,733 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,741 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,669 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,000 |
| Battle to Country | 0 | - | 4.91 | 53,499 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,063 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,570 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,356 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,931 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,157 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,516 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,371 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,057 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,812 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,451 |
| European Geography By Letter - O | 0 | - | 4.29 | 62,940 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,094 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,379 |
| European Geography A-Z | 0 | - | 4.29 | 49,356 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,317 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,900 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,998 |
| Lithuania Country Quiz | 0 | - | 4.61 | 31,673 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,078 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,757 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,093 |
| Departments of France | 0 | - | 4.93 | 54,413 |
| Germany Country Quiz | 0 | - | 4.83 | 158,142 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,586 |
| German History A-Z | 0 | - | 4.49 | 24,654 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,067 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,945 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,652 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,628 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,281 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,404 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,609 |
| Byzantine History | 0 | - | 4.91 | 28,911 |
| Byzantine Emperors | 0 | - | 4.92 | 14,349 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,093 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,162 |
| British Acronyms | 0 | - | 4.40 | 45,844 |
| British Monopoly Board | 0 | - | 4.52 | 41,191 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,946 |
| Medieval English History | 0 | - | 4.53 | 43,565 |
| England or Wales? | 0 | - | 4.94 | 45,787 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,942 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 123,082 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,313 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,057 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,374 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,707,080 |
| Anglo-Saxon and Viking Kings of England | 0 | - | 4.74 | 12,266 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,176 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,672 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,499 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,534 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,605 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,334 |
| The Only Remaining European Country . . . | 0 | - | 4.41 | 64,392 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,777 |
| Poland Country Quiz | 0 | - | 4.20 | 63,405 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,422 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 94,142 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,756 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 30,944 |
| Montenegro Country Quiz | 0 | - | 4.61 | 23,762 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,391 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,845 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,642 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,955 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,275 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,348 |
