| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,615 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,886 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,380 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,166 |
| Countries That Border Russia | 0 | - | 4.98 | 460,419 |
| Russia Country Quiz | 0 | - | 4.85 | 114,066 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,868 |
| Official European Union Languages | 0 | - | 4.97 | 237,710 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,347 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,628 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,894 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,274 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,771 |
| Name that Greek Letter | 0 | - | 4.93 | 322,606 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,759 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,612 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,675 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,255 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,513 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,120 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,409 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,576 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,205 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,772 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,690 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,051 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,319 |
| Celtic Nations | 0 | - | 4.69 | 46,876 |
| Champions League Winners | 0 | - | 4.92 | 1,001,028 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,635 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,627 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,714 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,371 |
| States of Germany | 0 | - | 4.96 | 151,165 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,585 |
| Regions of Italy | 0 | - | 4.92 | 75,240 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 49,575 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,224 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,761 |
| American to British Word Translation | 0 | - | 4.13 | 138,346 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,818 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,622 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,925 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,300 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,879 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,784 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,153 |
| Departments of France | 0 | - | 4.93 | 53,393 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,448 |
| British Spellings | 0 | - | 4.06 | 99,358 |
| England or Wales? | 0 | - | 4.94 | 45,499 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,307 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,767 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,685 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,515 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,628 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,314 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,904 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,154 |
| Slavic Languages | 0 | - | 4.68 | 54,165 |
| Countries that Border Poland | 0 | - | 4.99 | 171,819 |
| Russian History A-Z | 0 | - | 4.38 | 31,425 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,579 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,090 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,642 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,893 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,776 |
| The Trojan War | 0 | - | 4.83 | 39,577 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,203 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,528 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,304 |
| Roman Emperors | 0 | - | 4.95 | 119,309 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,363 |
| Languages of Spain | 0 | - | 4.36 | 23,238 |
| British to American Word Translation | 0 | - | 3.74 | 254,917 |
| British Foods by Description | 0 | - | 3.94 | 48,295 |
| British and American Word Differences | 0 | - | 2.63 | 46,827 |
| History of Russia Quiz | 0 | - | 4.49 | 31,848 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,644 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,529 |
| History of Italy | 0 | - | 4.55 | 31,907 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,471 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,571 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,103 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,443 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,699 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,142 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,121 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,001 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,453 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,352 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,040 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,819 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,448 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,620 |
| Europe Map Quiz | 0 | - | 5.00 | 4,747,034 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,147 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,792 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,085 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,129 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,806 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.73 | 65,544 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,258 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,910 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,764 |
| Capitals of French Regions | 0 | - | 4.45 | 16,020 |
| Regions of France | 0 | - | 4.77 | 120,004 |
| France Immigration by Country | 0 | - | 4.72 | 76,233 |
| German Loan Words | 0 | - | 4.27 | 135,628 |
| Famous Germans | 0 | - | 4.50 | 54,854 |
| German Groups of Things | 0 | - | 4.46 | 38,389 |
| Capitals of German States | 0 | - | 4.74 | 28,896 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,211 |
| Germany True or False? | 0 | - | 4.61 | 48,664 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,748 |
| Ancient Greek Words | 0 | - | 4.93 | 111,130 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,913 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,845 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,077 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,160 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,856 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,364 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,467 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,105 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,172 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,216 |
| Africa Map Quiz | 0 | - | 5.00 | 2,111,093 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,741 |
| Australian Capitals | 0 | - | 4.92 | 62,662 |
| European Physical Geography | 0 | - | 4.26 | 33,430 |
| Albania Country Quiz | 0 | - | 4.54 | 38,838 |
| Geography of Russia | 0 | - | 4.57 | 21,486 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,866 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,911 |
| History of Austria | 0 | - | 4.70 | 17,807 |
| Geography of the French Empire | 0 | - | 4.45 | 27,000 |
| The French Revolution | 0 | - | 4.46 | 23,868 |
| France Multiple Choice | 0 | - | 4.38 | 40,686 |
| History of France | 0 | - | 4.59 | 56,649 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,425 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,905 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,250 |
| The Vikings! | 0 | - | 4.46 | 28,290 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,901 |
| The Portuguese Empire | 0 | - | 4.58 | 12,031 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,460 |
| Champions League Top 4 | 0 | - | 4.77 | 135,026 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,444,150 |
| Asia Map Quiz | 0 | - | 4.99 | 911,271 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,807 |
| Elemental Words | 0 | - | 4.96 | 52,140 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 705,870 |
| Countries of Africa | 0 | - | 5.00 | 2,522,251 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,297 |
| African East Coast | 0 | - | 4.96 | 95,554 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,388 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,231 |
| Australia Map Quiz | 0 | - | 4.94 | 343,326 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,983 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,573 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,743 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,161 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,481 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,003 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,295 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,447 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,867 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,114 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,734 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,685 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,370 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,095 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,437 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,538 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,664 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,363 |
| European Geography A-Z | 0 | - | 4.29 | 49,123 |
| Country Codes of Europe | 0 | - | 3.46 | 13,678 |
| The Only European Country ... | 0 | - | 4.91 | 215,242 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,376 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,325 |
| Seas of Europe | 0 | - | 4.37 | 84,494 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 27,920 |
| Poland Country Quiz | 0 | - | 4.22 | 62,994 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,592 |
| Austria... or Australia? | 0 | - | 4.68 | 104,120 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,003 |
| Presidents of France | 0 | - | 4.25 | 23,989 |
| France A-Z | 0 | - | 4.16 | 38,116 |
| Word Chain - France | 0 | - | 4.38 | 42,680 |
| History of Germany | 0 | - | 4.39 | 52,729 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,873 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,845 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,271 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,544 |
| Italian Foods | 0 | - | 4.31 | 72,480 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,161 |
| The Mafia Quiz | 0 | - | 4.46 | 23,254 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,637 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,797 |
