| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,593 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,857 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,361 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,129 |
| Countries That Border Russia | 0 | - | 4.98 | 460,398 |
| Russia Country Quiz | 0 | - | 4.85 | 114,057 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,865 |
| Official European Union Languages | 0 | - | 4.97 | 237,695 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,339 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,610 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,888 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,270 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,723 |
| Name that Greek Letter | 0 | - | 4.93 | 322,585 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,755 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,602 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,672 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,244 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 217,493 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,116 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,396 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,552 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,202 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,770 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,648 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,038 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,318 |
| Celtic Nations | 0 | - | 4.69 | 46,875 |
| Champions League Winners | 0 | - | 4.92 | 1,000,938 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,628 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,618 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,709 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,359 |
| States of Germany | 0 | - | 4.96 | 151,146 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,563 |
| Regions of Italy | 0 | - | 4.92 | 75,232 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 49,175 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,208 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,760 |
| American to British Word Translation | 0 | - | 4.13 | 138,331 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,817 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,622 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,920 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,297 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,860 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,776 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,137 |
| Departments of France | 0 | - | 4.93 | 53,339 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,446 |
| British Spellings | 0 | - | 4.06 | 99,358 |
| England or Wales? | 0 | - | 4.94 | 45,499 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,296 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,759 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,683 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,514 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,628 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,309 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,896 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,151 |
| Slavic Languages | 0 | - | 4.68 | 54,155 |
| Countries that Border Poland | 0 | - | 4.99 | 171,809 |
| Russian History A-Z | 0 | - | 4.38 | 31,421 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,578 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,083 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,640 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,887 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,774 |
| The Trojan War | 0 | - | 4.83 | 39,576 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,195 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,525 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,295 |
| Roman Emperors | 0 | - | 4.95 | 119,269 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,362 |
| Languages of Spain | 0 | - | 4.36 | 23,237 |
| British to American Word Translation | 0 | - | 3.74 | 254,915 |
| British Foods by Description | 0 | - | 3.94 | 48,293 |
| British and American Word Differences | 0 | - | 2.63 | 46,827 |
| History of Russia Quiz | 0 | - | 4.49 | 31,847 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,643 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,494 |
| History of Italy | 0 | - | 4.55 | 31,907 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,464 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,571 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,101 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,432 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,694 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,138 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,118 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,998 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,451 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,347 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,037 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,818 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,447 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,619 |
| Europe Map Quiz | 0 | - | 5.00 | 4,746,711 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,144 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,787 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,083 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,126 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,804 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.73 | 65,540 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,255 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,909 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,761 |
| Capitals of French Regions | 0 | - | 4.45 | 16,019 |
| Regions of France | 0 | - | 4.77 | 119,998 |
| France Immigration by Country | 0 | - | 4.72 | 76,224 |
| German Loan Words | 0 | - | 4.27 | 135,626 |
| Famous Germans | 0 | - | 4.50 | 54,850 |
| German Groups of Things | 0 | - | 4.46 | 38,386 |
| Capitals of German States | 0 | - | 4.74 | 28,895 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,208 |
| Germany True or False? | 0 | - | 4.61 | 48,664 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,739 |
| Ancient Greek Words | 0 | - | 4.93 | 111,122 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,907 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,843 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,072 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,160 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,850 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,362 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,467 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,098 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,167 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,197 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,950 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,708 |
| Australian Capitals | 0 | - | 4.92 | 62,661 |
| European Physical Geography | 0 | - | 4.26 | 33,428 |
| Albania Country Quiz | 0 | - | 4.54 | 38,836 |
| Geography of Russia | 0 | - | 4.57 | 21,485 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,861 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,910 |
| History of Austria | 0 | - | 4.70 | 17,807 |
| Geography of the French Empire | 0 | - | 4.45 | 27,000 |
| The French Revolution | 0 | - | 4.46 | 23,866 |
| France Multiple Choice | 0 | - | 4.38 | 40,686 |
| History of France | 0 | - | 4.59 | 56,646 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,887 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,211 |
| The Vikings! | 0 | - | 4.46 | 28,290 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,896 |
| The Portuguese Empire | 0 | - | 4.58 | 12,030 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,455 |
| Champions League Top 4 | 0 | - | 4.77 | 135,011 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,444,081 |
| Asia Map Quiz | 0 | - | 4.99 | 911,156 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,804 |
| Elemental Words | 0 | - | 4.96 | 52,137 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 705,843 |
| Countries of Africa | 0 | - | 5.00 | 2,522,047 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,288 |
| African East Coast | 0 | - | 4.96 | 95,545 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,373 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,220 |
| Australia Map Quiz | 0 | - | 4.94 | 343,322 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,846 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,572 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,739 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,140 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,477 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,988 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,277 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,444 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,865 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,111 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,729 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,683 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,367 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,094 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,434 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,534 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,661 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,352 |
| European Geography A-Z | 0 | - | 4.29 | 49,117 |
| Country Codes of Europe | 0 | - | 3.46 | 13,677 |
| The Only European Country ... | 0 | - | 4.91 | 215,218 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,364 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,320 |
| Seas of Europe | 0 | - | 4.37 | 84,491 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 27,912 |
| Poland Country Quiz | 0 | - | 4.22 | 62,990 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,591 |
| Austria... or Australia? | 0 | - | 4.68 | 104,117 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,002 |
| Presidents of France | 0 | - | 4.25 | 23,986 |
| France A-Z | 0 | - | 4.16 | 38,115 |
| Word Chain - France | 0 | - | 4.38 | 42,680 |
| History of Germany | 0 | - | 4.39 | 52,727 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,871 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,844 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,266 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,543 |
| Italian Foods | 0 | - | 4.31 | 72,473 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,157 |
| The Mafia Quiz | 0 | - | 4.46 | 23,254 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,632 |
| Geography of the Roman Empire | 0 | - | 4.56 | 51,795 |
