| European Geography By Letter - B #2 | 0 | - | 4.85 | 77,879 |
| Name the English Monarchs | 0 | - | 4.91 | 501,314 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 100,124 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,435 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,863 |
| British History A-Z #1 | 0 | - | 4.45 | 46,387 |
| Monarchies of Europe | 0 | - | 4.90 | 97,925 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,852 |
| Countries That Border Russia | 0 | - | 4.98 | 461,017 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,387 |
| European Geography By Letter - A | 0 | - | 4.51 | 144,716 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 112,555 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,298 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,032 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,100 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,091 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,190 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,530 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,215 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,778 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,097 |
| Europe Map Quiz | 0 | - | 5.00 | 4,754,465 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,331 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,848 |
| Top 10 Hottest European Countries | 0 | - | 4.88 | 126,751 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,505 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,602 |
| Russia Country Quiz | 0 | - | 4.85 | 114,243 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,473 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,380 |
| Countries that Border Poland | 0 | - | 4.99 | 172,023 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,229 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,112 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,549 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,409 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,137 |
| Countries Invaded by the USSR | 0 | - | 4.29 | 93,907 |
| The Trojan War | 0 | - | 4.83 | 39,639 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,927 |
| Name that Greek Letter | 0 | - | 4.93 | 323,036 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,501 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,399 |
| Roman Emperors | 0 | - | 4.95 | 119,627 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,467 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,883 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,208 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,539 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,719 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,368 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,211 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,874 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,477 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,727 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,988 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,768 |
| European Geography A-Z | 0 | - | 4.29 | 49,183 |
| The Only European Country ... | 0 | - | 4.91 | 215,903 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,715 |
| Russia A-Z | 0 | - | 4.46 | 27,218 |
| German History A-Z | 0 | - | 4.49 | 24,567 |
| Olympian Gods Quiz | 0 | - | 4.96 | 499,436 |
| History of The Netherlands | 0 | - | 4.46 | 17,403 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,249 |
| India A-Z | 0 | - | 4.42 | 34,083 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,959 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,239,417 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,325,857 |
| History of Russia Quiz | 0 | - | 4.49 | 31,878 |
| Ancient Greek Words | 0 | - | 4.93 | 111,308 |
| History of Italy | 0 | - | 4.55 | 31,932 |
| Italian History A-Z | 0 | - | 4.21 | 17,663 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,606 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,156 |
| Spanish History A-Z | 0 | - | 4.37 | 19,260 |
| Countries Closest to Spain A-Z | 0 | - | 4.98 | 108,098 |
| Counties of England | 0 | - | 4.97 | 794,522 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,783 |
| The Reign of Queen Elizabeth I | 0 | - | 4.53 | 31,734 |
| Houses of British Monarchs | 0 | - | 4.53 | 65,560 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 354,051 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,392 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,938 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,087 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,955 |
| European Secessionist Movements on a Map | 0 | - | 4.53 | 34,911 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,905 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,462 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,964 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,692 |
| Slavic Countries | 0 | - | 4.96 | 111,455 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,999 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,985 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,230 |
| British Geography A-Z | 0 | - | 4.42 | 19,491 |
| London A-Z | 0 | - | 4.10 | 40,743 |
| Champions League Winners | 0 | - | 4.92 | 1,003,483 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,054 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,610 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,348 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,810 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,284 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,931 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,735 |
| Countries that Start with A | 0 | - | 4.98 | 2,158,143 |
| Countries that Start with B | 0 | - | 4.95 | 2,290,167 |
| Countries that Start with C | 0 | - | 4.96 | 1,818,601 |
| Countries that Start with D | 0 | - | 4.96 | 707,204 |
| Countries that Start with E | 0 | - | 4.95 | 1,374,373 |
| Countries that Start with G | 0 | - | 4.97 | 1,500,014 |
| Countries that Start with H | 0 | - | 4.96 | 602,739 |
| Countries that Start with I | 0 | - | 4.92 | 1,285,774 |
| Countries that Start with J | 0 | - | 4.98 | 600,591 |
| Countries that Start with K | 0 | - | 4.97 | 813,701 |
| Countries that Start with L | 0 | - | 4.98 | 1,088,524 |
| Countries that Start with N | 0 | - | 4.93 | 1,115,460 |
| Countries that Start with P | 0 | - | 4.94 | 1,213,970 |
| Countries that Start with S | 0 | - | 4.98 | 1,751,887 |
| Countries that Start with T | 0 | - | 4.90 | 1,008,222 |
| Countries that Start with U | 0 | - | 4.97 | 903,143 |
| Countries that Start with V | 0 | - | 4.98 | 608,205 |
| Countries that Start with F | 0 | - | 4.83 | 616,034 |
| Countries that Start with M | 0 | - | 4.97 | 1,379,212 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,130 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 95,647 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 137,208 |
| Three Band Flags of Europe | 0 | - | 4.98 | 192,872 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,866 |
| Pixelated Europe Map | 0 | - | 4.88 | 122,472 |
| European Countries with One Border | 0 | - | 4.97 | 182,469 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 179,280 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,649 |
| Albania Country Quiz | 0 | - | 4.54 | 38,908 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,229 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,697 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,964 |
| History of Austria | 0 | - | 4.70 | 17,831 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,090 |
| Geography of the French Empire | 0 | - | 4.45 | 27,019 |
| The French Revolution | 0 | - | 4.46 | 23,897 |
| Countries Bordering France | 0 | - | 4.83 | 401,793 |
| Kings of France Quiz | 0 | - | 4.20 | 32,679 |
| History of France | 0 | - | 4.59 | 56,801 |
| French History A-Z | 0 | - | 4.23 | 24,538 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,508 |
| States of Germany | 0 | - | 4.96 | 151,787 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,460 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,855 |
| Countries Closest to Germany A-Z | 0 | - | 4.98 | 27,211 |
| Countries Bordering Germany | 0 | - | 4.99 | 368,527 |
| Figures from Greek Mythology | 0 | - | 4.91 | 186,366 |
| Regions of Italy | 0 | - | 4.92 | 75,506 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,781 |
| The Vikings! | 0 | - | 4.46 | 28,317 |
| The Portuguese Empire | 0 | - | 4.58 | 12,045 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,598 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,971 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,522 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,303 |
| English Royal Consorts | 0 | - | 4.37 | 37,310 |
| Countries the UK Declared War On | 0 | - | 4.61 | 122,277 |
| Geography of the British Empire | 0 | - | 4.48 | 39,627 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,655 |
| Monarchies of Asia | 0 | - | 4.97 | 70,955 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,760 |
| Battle to Country | 0 | - | 4.91 | 53,113 |
| Capitals A-Z #1 | 0 | - | 4.86 | 51,432 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,579 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,034 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 83,275 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,839 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,244 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,740 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 72,790 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,686,996 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,028 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,266 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,332 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,233 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,727 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 259,803 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,702 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,219 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,075 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,281 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,704 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,168 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,399 |
| Departments of France | 0 | - | 4.93 | 53,726 |
| Countries that Visit France the Most | 0 | - | 4.85 | 45,777 |
| Countries Closest to Metropolitan France | 0 | - | 4.89 | 72,077 |
| Germany Country Quiz | 0 | - | 4.82 | 157,525 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,845 |
| Countries With the Most German Speakers | 0 | - | 4.89 | 96,005 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,930 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,874 |
| Counties of Ireland | 0 | - | 4.92 | 194,560 |
| Italy Country Quiz | 0 | - | 4.82 | 123,154 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,071 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,789 |
| Countries Bordering Italy | 0 | - | 4.94 | 100,737 |
