| European Countries by First 2 Letters | 0 | - | 4.95 | 529,096 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,298 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,088 |
| Federal Subjects of Russia | 0 | - | 4.95 | 146,663 |
| Famous Germans | 0 | - | 4.50 | 55,231 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,382 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,047 |
| Official European Union Languages | 0 | - | 4.97 | 238,274 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,701 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,788 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,574 |
| Countries that Border Poland | 0 | - | 4.99 | 172,140 |
| Famous Russians | 0 | - | 4.16 | 23,828 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,925 |
| Famous French People | 0 | - | 4.06 | 35,281 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,788 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,374 |
| Celtic Nations | 0 | - | 4.69 | 46,916 |
| European Geography By Letter - A | 0 | - | 4.52 | 145,604 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 112,739 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,459 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,174 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,225 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,274 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,312 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,625 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,532 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,851 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,223 |
| European Geography By Letter - S #1 | 0 | - | 4.54 | 100,434 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,136 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,004 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,618 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,052 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,312 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,919 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,070 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,273 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,004 |
| States of Germany | 0 | - | 4.96 | 152,145 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,941 |
| Famous Irish People | 0 | - | 4.05 | 45,988 |
| Regions of Italy | 0 | - | 4.92 | 75,691 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,007 |
| Famous Nordic People | 0 | - | 4.34 | 20,082 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,613 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,755 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,096 |
| Champions League Winners | 0 | - | 4.92 | 1,005,173 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,431 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,438 |
| Countries That Border Russia | 0 | - | 4.98 | 461,345 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,610 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,675 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,331 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,652 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,824 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,471 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,312 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,958 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,565 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,800 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 51,063 |
| European Geography A-Z | 0 | - | 4.29 | 49,221 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,856 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,485 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,867 |
| Russia Country Quiz | 0 | - | 4.85 | 114,359 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,280 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,314 |
| Departments of France | 0 | - | 4.93 | 53,943 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,529 |
| History of The Netherlands | 0 | - | 4.46 | 17,421 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,720 |
| Famous Scottish People | 0 | - | 4.22 | 18,391 |
| England or Wales? | 0 | - | 4.94 | 45,632 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,066 |
| Famous Australians by Description | 0 | - | 4.23 | 27,895 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,647 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,574 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,687 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,466 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,383 |
| Slavic Languages | 0 | - | 4.68 | 54,303 |
| Poland Country Quiz | 0 | - | 4.22 | 63,214 |
| Russian History A-Z | 0 | - | 4.38 | 31,639 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,769 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,134 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,824 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,759 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,310 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,738 |
| France A-Z | 0 | - | 4.16 | 38,184 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 646,583 |
| Name that Greek Letter | 0 | - | 4.93 | 323,237 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,588 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,438 |
| Switzerland A-Z | 0 | - | 4.45 | 25,627 |
| Africa A-Z | 0 | - | 4.57 | 46,582 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,001 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,936 |
| History of Russia Quiz | 0 | - | 4.49 | 31,898 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,710 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,523 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,332 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,124 |
| The Trojan War | 0 | - | 4.83 | 39,672 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,649 |
| History of Italy | 0 | - | 4.55 | 31,954 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,698 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,457 |
| Roman Emperors | 0 | - | 4.95 | 119,767 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,634 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,188 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,520 |
| People on Money - England | 0 | - | 4.29 | 16,607 |
| London A-Z | 0 | - | 4.10 | 40,749 |
| Asian Cities A-Z by Clue | 0 | - | 4.49 | 35,480 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,835 |
| Famous Chinese People | 0 | - | 4.09 | 11,870 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,939 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,125 |
| Europe Map Quiz | 0 | - | 5.00 | 4,758,152 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,232 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,896 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,186 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,205 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,984 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,940 |
| Capitals of French Regions | 0 | - | 4.45 | 16,052 |
| Regions of France | 0 | - | 4.75 | 120,553 |
| France Immigration by Country | 0 | - | 4.70 | 76,446 |
| German Groups of Things | 0 | - | 4.46 | 38,453 |
| Capitals of German States | 0 | - | 4.74 | 28,940 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,301 |
| Germany True or False? | 0 | - | 4.61 | 48,762 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,925 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,145 |
| Ancient Greek Words | 0 | - | 4.93 | 111,440 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,282 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,243 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,136 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,877 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,542 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,088 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,647 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,378 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,844 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,319 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,974 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,802 |
| Middle East A-Z | 0 | - | 4.47 | 45,989 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,314,875 |
| Africa Map Quiz | 0 | - | 5.00 | 2,115,818 |
| Oceania Map Quiz | 0 | - | 4.98 | 641,220 |
| Australian Capitals | 0 | - | 4.92 | 62,708 |
| Canada A-Z | 0 | - | 4.73 | 32,792 |
| European Physical Geography | 0 | - | 4.26 | 33,484 |
| Albania Country Quiz | 0 | - | 4.54 | 38,949 |
| Geography of Russia | 0 | - | 4.57 | 21,517 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,162 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,923 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,655 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,366 |
| Romania Country Quiz | 0 | - | 4.63 | 53,724 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,987 |
| History of Austria | 0 | - | 4.70 | 17,849 |
| Geography of the French Empire | 0 | - | 4.45 | 27,039 |
| The French Revolution | 0 | - | 4.46 | 23,918 |
| France Multiple Choice | 0 | - | 4.39 | 40,721 |
| History of France | 0 | - | 4.59 | 56,902 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,466 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,580 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,048 |
| The Vikings! | 0 | - | 4.46 | 28,333 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,079 |
| The Portuguese Empire | 0 | - | 4.58 | 12,054 |
| American to British Word Translation | 0 | - | 4.14 | 138,861 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,872 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,627 |
| Champions League Top 4 | 0 | - | 4.77 | 136,059 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,447,395 |
| Asia Map Quiz | 0 | - | 4.99 | 915,373 |
| A Quiz About Islam | 0 | - | 4.31 | 48,409 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 34,793 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,976 |
| Countries of Africa | 0 | - | 5.00 | 2,532,495 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,706 |
| African East Coast | 0 | - | 4.96 | 95,919 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,736 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,555 |
| Australia Map Quiz | 0 | - | 4.95 | 344,093 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,348 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,827 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,441 |
| United States Map Quiz | 0 | - | 4.98 | 4,155,228 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 746,573 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,408 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,935 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,609 |
