| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,667 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,810 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,179 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,834 |
| Countries That Border Russia | 0 | - | 4.98 | 462,985 |
| Russia Country Quiz | 0 | - | 4.83 | 114,753 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,371 |
| Official European Union Languages | 0 | - | 4.97 | 239,007 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,189 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,355 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,704 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,117 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,335 |
| Name that Greek Letter | 0 | - | 4.93 | 324,255 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,132 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,402 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,927 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,540 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,656 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,572 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,543 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,503 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,232 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,493 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,690 |
| Top African Languages on a Map | 0 | - | 4.92 | 74,559 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,437 |
| Celtic Nations | 0 | - | 4.69 | 47,006 |
| Russian History A-Z | 0 | - | 4.35 | 31,891 |
| Champions League Winners | 0 | - | 4.92 | 1,010,456 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,004 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,438 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,258 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,390 |
| States of Germany | 0 | - | 4.95 | 153,391 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,324 |
| Regions of Italy | 0 | - | 4.92 | 76,336 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,473 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,551 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,447 |
| American to British Word Translation | 0 | - | 4.14 | 139,358 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,961 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,765 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,432 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,601 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,133 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,537 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,817 |
| Departments of France | 0 | - | 4.93 | 54,542 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,626 |
| British Spellings | 0 | - | 4.06 | 99,517 |
| England or Wales? | 0 | - | 4.94 | 45,817 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,129 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,450 |
| English Words of Arabic Origin | 0 | - | 4.54 | 49,817 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,660 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,676 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,932 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,740 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,669 |
| Slavic Languages | 0 | - | 4.68 | 54,495 |
| Countries that Border Poland | 0 | - | 4.99 | 172,658 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,009 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,699 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,889 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,401 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,238 |
| The Trojan War | 0 | - | 4.83 | 39,815 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,323 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,676 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,670 |
| Roman Emperors | 0 | - | 4.95 | 120,455 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,521 |
| Languages of Spain | 0 | - | 4.36 | 23,357 |
| British to American Word Translation | 0 | - | 3.74 | 255,191 |
| British Foods by Description | 0 | - | 3.94 | 48,346 |
| British and American Word Differences | 0 | - | 2.63 | 46,901 |
| History of Russia Quiz | 0 | - | 4.47 | 31,960 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,787 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,084 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,614 |
| History of Italy | 0 | - | 4.55 | 32,067 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,008 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,733 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,311 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,044 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,443 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,837 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,390 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,053 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,394 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,241 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,054 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,317 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,886 |
| Europe Map Quiz | 0 | - | 5.00 | 4,773,188 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,373 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,035 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,330 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,311 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,926 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,837 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,564 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,087 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,153 |
| Capitals of French Regions | 0 | - | 4.45 | 16,117 |
| Regions of France | 0 | - | 4.70 | 121,343 |
| France Immigration by Country | 0 | - | 4.70 | 76,705 |
| German Loan Words | 0 | - | 4.28 | 139,350 |
| Famous Germans | 0 | - | 4.50 | 55,555 |
| German Groups of Things | 0 | - | 4.46 | 38,533 |
| Capitals of German States | 0 | - | 4.74 | 28,993 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,414 |
| Germany True or False? | 0 | - | 4.61 | 48,907 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,172 |
| Ancient Greek Words | 0 | - | 4.93 | 111,980 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,877 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,297 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,522 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,357 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,482 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,498 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,704 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,733 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,208 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,155 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,778 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,673 |
| Oceania Map Quiz | 0 | - | 4.98 | 654,837 |
| Australian Capitals | 0 | - | 4.92 | 62,764 |
| European Physical Geography | 0 | - | 4.26 | 33,545 |
| Albania Country Quiz | 0 | - | 4.54 | 39,099 |
| Geography of Russia | 0 | - | 4.57 | 21,557 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,029 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,109 |
| History of Austria | 0 | - | 4.70 | 17,916 |
| Geography of the French Empire | 0 | - | 4.45 | 27,161 |
| The French Revolution | 0 | - | 4.47 | 24,072 |
| France Multiple Choice | 0 | - | 4.39 | 40,777 |
| History of France | 0 | - | 4.61 | 57,315 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,847 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,241 |
| The Vikings! | 0 | - | 4.46 | 28,372 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,229 |
| The Portuguese Empire | 0 | - | 4.58 | 12,086 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,185 |
| Champions League Top 4 | 0 | - | 4.77 | 137,436 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,921 |
| Asia Map Quiz | 0 | - | 4.99 | 920,239 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,201 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,518 |
| Elemental Words | 0 | - | 4.96 | 52,403 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 708,729 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,010 |
| Australia Map Quiz | 0 | - | 4.95 | 345,305 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,313 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.21 | 52,679 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,972 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,904 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,755 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,704 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,195 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,304 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,655 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,506 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,192 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,929 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,561 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,040 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,173 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,763 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,465 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,805 |
| European Geography A-Z | 0 | - | 4.29 | 49,376 |
| Country Codes of Europe | 0 | - | 3.43 | 13,762 |
| The Only European Country ... | 0 | - | 4.91 | 217,578 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,701 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,673 |
| Seas of Europe | 0 | - | 4.37 | 84,745 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 28,324 |
| Poland Country Quiz | 0 | - | 4.20 | 63,458 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,648 |
| Austria... or Australia? | 0 | - | 4.68 | 104,530 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,094 |
| Famous French People | 0 | - | 4.07 | 35,896 |
| Presidents of France | 0 | - | 4.25 | 24,219 |
| France A-Z | 0 | - | 4.16 | 38,276 |
| Word Chain - France | 0 | - | 4.38 | 42,856 |
| French History Multiple Choice | 0 | - | 4.55 | 33,138 |
| History of Germany | 0 | - | 4.39 | 52,908 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,095 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,954 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.59 | 73,939 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 41,722 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,853 |
| Italian Foods | 0 | - | 4.30 | 72,985 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,441 |
| The Mafia Quiz | 0 | - | 4.46 | 23,382 |
| Ancient Roman Trivia #2 | 0 | - | 4.57 | 38,805 |
| Geography of the Roman Empire | 0 | - | 4.56 | 52,002 |
