| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,508 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,747 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,271 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 210,995 |
| Countries That Border Russia | 0 | - | 4.98 | 460,300 |
| Russia Country Quiz | 0 | - | 4.85 | 114,033 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,846 |
| Official European Union Languages | 0 | - | 4.97 | 237,641 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,307 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,533 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,861 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,240 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,555 |
| Name that Greek Letter | 0 | - | 4.93 | 322,525 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,744 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,565 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,667 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,196 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,395 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,095 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,282 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,436 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,195 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,738 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,448 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,021 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,314 |
| Celtic Nations | 0 | - | 4.69 | 46,871 |
| Champions League Winners | 0 | - | 4.92 | 1,000,601 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,616 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,585 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,677 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,324 |
| States of Germany | 0 | - | 4.96 | 151,049 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,445 |
| Regions of Italy | 0 | - | 4.92 | 75,192 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 47,019 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,163 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,725 |
| American to British Word Translation | 0 | - | 4.13 | 138,253 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,810 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,617 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,897 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,293 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,751 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,700 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,068 |
| Departments of France | 0 | - | 4.93 | 53,293 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,435 |
| British Spellings | 0 | - | 4.06 | 99,352 |
| England or Wales? | 0 | - | 4.94 | 45,486 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,229 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,737 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,678 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,507 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,626 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,268 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,821 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,121 |
| Slavic Languages | 0 | - | 4.68 | 54,151 |
| Countries that Border Poland | 0 | - | 4.99 | 171,770 |
| Russian History A-Z | 0 | - | 4.38 | 31,393 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,559 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,056 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,631 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,864 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,743 |
| The Trojan War | 0 | - | 4.83 | 39,560 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,146 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,521 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,276 |
| Roman Emperors | 0 | - | 4.95 | 119,227 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,348 |
| Languages of Spain | 0 | - | 4.36 | 23,231 |
| British to American Word Translation | 0 | - | 3.74 | 254,904 |
| British Foods by Description | 0 | - | 3.94 | 48,293 |
| British and American Word Differences | 0 | - | 2.63 | 46,824 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,641 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,370 |
| History of Italy | 0 | - | 4.55 | 31,896 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,431 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,564 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,091 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,363 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,674 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,130 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,104 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,982 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,439 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,315 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,025 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,804 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,438 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,600 |
| Europe Map Quiz | 0 | - | 5.00 | 4,745,523 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,128 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,771 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,078 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,119 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,796 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.73 | 65,530 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,233 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,898 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,742 |
| Capitals of French Regions | 0 | - | 4.45 | 16,017 |
| Regions of France | 0 | - | 4.77 | 119,948 |
| France Immigration by Country | 0 | - | 4.72 | 76,189 |
| German Loan Words | 0 | - | 4.27 | 135,608 |
| Famous Germans | 0 | - | 4.50 | 54,824 |
| German Groups of Things | 0 | - | 4.46 | 38,380 |
| Capitals of German States | 0 | - | 4.74 | 28,891 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,198 |
| Germany True or False? | 0 | - | 4.61 | 48,661 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,723 |
| Ancient Greek Words | 0 | - | 4.93 | 111,092 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,875 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,832 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,054 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,153 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,821 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,357 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,460 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,019 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,123 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,144 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,510 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,495 |
| Australian Capitals | 0 | - | 4.92 | 62,657 |
| European Physical Geography | 0 | - | 4.26 | 33,421 |
| Albania Country Quiz | 0 | - | 4.54 | 38,827 |
| Geography of Russia | 0 | - | 4.57 | 21,478 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,850 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,897 |
| History of Austria | 0 | - | 4.70 | 17,798 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,860 |
| France Multiple Choice | 0 | - | 4.38 | 40,679 |
| History of France | 0 | - | 4.59 | 56,614 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,826 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,121 |
| The Vikings! | 0 | - | 4.46 | 28,285 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,855 |
| The Portuguese Empire | 0 | - | 4.58 | 12,027 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,433 |
| Champions League Top 4 | 0 | - | 4.77 | 134,927 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,871 |
| Asia Map Quiz | 0 | - | 4.99 | 910,855 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,795 |
| Elemental Words | 0 | - | 4.96 | 52,121 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 705,744 |
| Countries of Africa | 0 | - | 5.00 | 2,521,112 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,248 |
| African East Coast | 0 | - | 4.96 | 95,513 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,357 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,193 |
| Australia Map Quiz | 0 | - | 4.94 | 343,252 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,315 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,568 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,724 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,059 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,464 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,908 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,194 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,428 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,847 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,095 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,714 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,672 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,356 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,085 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,426 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,520 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,648 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,296 |
| European Geography A-Z | 0 | - | 4.29 | 49,110 |
| Country Codes of Europe | 0 | - | 3.46 | 13,676 |
| The Only European Country ... | 0 | - | 4.91 | 215,101 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,294 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,308 |
| Seas of Europe | 0 | - | 4.37 | 84,477 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 27,888 |
| Poland Country Quiz | 0 | - | 4.22 | 62,977 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,589 |
| Austria... or Australia? | 0 | - | 4.68 | 104,098 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,000 |
| Presidents of France | 0 | - | 4.25 | 23,979 |
| France A-Z | 0 | - | 4.16 | 38,111 |
| Word Chain - France | 0 | - | 4.38 | 42,673 |
| History of Germany | 0 | - | 4.39 | 52,723 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,867 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,841 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,241 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,537 |
| Italian Foods | 0 | - | 4.31 | 72,443 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,140 |
| The Mafia Quiz | 0 | - | 4.46 | 23,252 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,622 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,787 |
