| Federal Subjects of Russia | 0 | - | 4.95 | 109,537 |
| Europe Geography Decoder | 0 | - | 4.89 | 62,704 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 453,350 |
| Add A Letter - Make a European City | 0 | - | 4.87 | 20,678 |
| Countries That Border Russia | 0 | - | 4.98 | 422,828 |
| Category Elimination - European Geography #1 | 0 | - | 4.97 | 197,828 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 243,284 |
| Russia Country Quiz | 0 | - | 4.84 | 102,159 |
| German Groups of Things | 0 | - | 4.43 | 35,729 |
| Official European Union Languages | 0 | - | 4.98 | 198,502 |
| European Countries in their Native Language | 0 | - | 4.99 | 142,736 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 381,410 |
| Word Scramble - European Countries | 0 | - | 4.72 | 112,733 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.94 | 75,404 |
| Countries that Beat Switzerland | 0 | - | 4.85 | 37,215 |
| British Groups of Things | 0 | - | 4.26 | 79,907 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.82 | 38,890 |
| Word Chain - Russia | 0 | - | 4.41 | 14,730 |
| Celtic Nations | 0 | - | 4.76 | 44,488 |
| Europe Geography Quiz #1 | 0 | - | 4.52 | 66,676 |
| Europe Geography Quiz #2 | 0 | - | 4.56 | 67,137 |
| Europe Geography Quiz #4 | 0 | - | 4.56 | 65,856 |
| Europe Geography Quiz #5 | 0 | - | 4.53 | 57,562 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.89 | 78,903 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 282,797 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 113,030 |
| Most Mentioned Allies of Russia | 0 | - | 4.47 | 33,921 |
| Most Mentioned Enemies of Russia | 0 | - | 4.70 | 81,839 |
| Regions of Spain Quiz | 0 | - | 4.85 | 93,308 |
| Cantons of Switzerland | 0 | - | 4.96 | 39,676 |
| Champions League Winners | 0 | - | 4.90 | 836,079 |
| Africa Geography Quiz #1 | 0 | - | 4.91 | 45,854 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 99,846 |
| Catholic Countries in Europe | 0 | - | 4.87 | 82,581 |
| Famous Russians Quiz | 0 | - | 4.15 | 22,548 |
| States of Germany | 0 | - | 4.94 | 121,167 |
| Germany Immigration by Country | 0 | - | 4.90 | 68,751 |
| Counties of Ireland | 0 | - | 4.89 | 156,896 |
| Regions of Italy | 0 | - | 4.88 | 59,366 |
| Count to 10 in Europe: Pro | 0 | - | 4.79 | 60,528 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.71 | 53,385 |
| History of Russia Quiz | 0 | - | 4.48 | 29,715 |
| Geography of Russia | 0 | - | 4.54 | 20,058 |
| States of the German Confederation in 1848 | 0 | - | 4.84 | 26,022 |
| Countries Surrounding Rome | 0 | - | 4.96 | 46,352 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 31,253 |
| United Kingdom Decoder | 0 | - | 4.27 | 38,633 |
| England or Wales? | 0 | - | 4.93 | 39,772 |
| All Champions League Teams Ever | 0 | - | 4.89 | 102,112 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 144,832 |
| Europe Geography Quiz #3 | 0 | - | 4.31 | 59,615 |
| Word Chain - France | 0 | - | 4.38 | 39,728 |
| Spanish Immigration by Country | 0 | - | 4.58 | 51,462 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 80,463 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.42 | 244,668 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 286,269 |
| Pre-Euro Currencies | 0 | - | 4.42 | 49,112 |
| Top 20 Football Clubs in Europe | 0 | - | 4.52 | 82,962 |
| Name a Major European City A-Z | 0 | - | 4.33 | 42,409 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.93 | 55,294 |
| Slavic Languages | 0 | - | 4.58 | 48,361 |
| Countries that Border Poland | 0 | - | 4.99 | 157,350 |
| Countries that Border Hungary | 0 | - | 4.98 | 95,709 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.82 | 30,613 |
| Moldova Country Quiz | 0 | - | 4.87 | 27,016 |
| Countries Bordering Serbia | 0 | - | 4.95 | 82,247 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 578,840 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 71,217 |
| Roman Emperors | 0 | - | 4.95 | 94,561 |
| Geography of the Dutch Empire | 0 | - | 4.70 | 31,915 |
| Most Common Last Names in Sweden | 0 | - | 4.41 | 13,982 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 64,900 |
| Word Chain - United Kingdom | 0 | - | 4.03 | 27,829 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 252,394 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 242,633 |
| California Groups of Things | 0 | - | 4.23 | 42,493 |
| New York Groups of Things | 0 | - | 4.39 | 56,907 |
| U.S. History Groups of Two | 0 | - | 4.27 | 35,081 |
| Top European Languages on a Map | 0 | - | 4.76 | 116,544 |
| Russia Multiple Choice | 0 | - | 4.56 | 37,798 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.87 | 88,462 |
| Latvia Country Quiz | 0 | - | 4.88 | 28,133 |
| French Geography Quiz #1 | 0 | - | 4.86 | 30,723 |
| Word Chain - Germany | 0 | - | 4.29 | 20,968 |
| Germany Multiple Choice | 0 | - | 4.80 | 48,785 |
| The Trojan War | 0 | - | 4.81 | 35,584 |
| Name that Greek Letter | 0 | - | 4.94 | 293,786 |
| Word Chain - Italy | 0 | - | 4.08 | 21,892 |
| Italy Multiple Choice | 0 | - | 4.72 | 92,587 |
| Provinces of the Netherlands | 0 | - | 4.61 | 32,894 |
| 100 Greatest Britons Quiz | 0 | - | 4.44 | 45,860 |
| British Acronyms | 0 | - | 4.42 | 43,159 |
| Fictional Characters from Great Britain | 0 | - | 4.10 | 31,145 |
| Foods in a Full English Breakfast | 0 | - | 4.43 | 72,632 |
| Beatles Songs Quiz | 0 | - | 4.94 | 203,887 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 271,415 |
| Asia Geography Quiz #1 | 0 | - | 4.79 | 50,657 |
| Asia Geography Quiz #2 | 0 | - | 4.59 | 45,017 |
| Famous People from Africa | 0 | - | 4.42 | 10,209 |
| Word Chain - Africa | 0 | - | 4.43 | 29,488 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.96 | 22,415 |
| Name a Valid Answer - United States #1 | 0 | - | 4.70 | 84,566 |
| European Geography By Letter - A | 0 | - | 4.55 | 123,507 |
| European Geography By Letter - B #1 | 0 | - | 4.72 | 102,904 |
| European Geography By Letter - C | 0 | - | 4.44 | 104,316 |
| European Geography By Letter - D | 0 | - | 4.52 | 98,913 |
| European Geography By Letter - L | 0 | - | 4.50 | 104,346 |
| European Geography By Letter - M | 0 | - | 4.55 | 113,826 |
| European Geography By Letter - P | 0 | - | 4.79 | 89,004 |
| European Geography By Letter - N | 0 | - | 4.43 | 93,008 |
| European Geography By Letter - V | 0 | - | 4.45 | 85,849 |
| Europe Map Quiz | 0 | - | 5.00 | 4,248,157 |
| European Geography By Letter - S #1 | 0 | - | 4.57 | 93,461 |
| European Geography A-Z | 0 | - | 4.43 | 44,981 |
| European Geography By Letter - B #2 | 0 | - | 4.72 | 61,419 |
| Regions of France | 0 | - | 4.59 | 98,762 |
| France Immigration by Country | 0 | - | 4.80 | 68,200 |
| Capitals of German States | 0 | - | 4.67 | 26,952 |
| Chancellors of Germany, 1949–present | 0 | - | 4.56 | 13,289 |
| Germany True or False? | 0 | - | 4.64 | 44,028 |
| Largest Islands of Greece | 0 | - | 4.56 | 38,780 |
| Olympian Gods Quiz | 0 | - | 4.96 | 454,475 |
| Ancient Greek Words | 0 | - | 4.90 | 96,010 |
| Capitals of Italian Regions | 0 | - | 4.52 | 25,982 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 395,790 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 47,908 |
| The Vikings! | 0 | - | 4.44 | 26,996 |
| Sweden Immigration by Country | 0 | - | 4.66 | 41,851 |
| The Portuguese Empire | 0 | - | 4.54 | 11,279 |
| British Words Quiz #2 | 0 | - | 4.02 | 106,545 |
| Languages of the United Kingdom | 0 | - | 4.10 | 38,148 |
| United Kingdom A-Z | 0 | - | 4.53 | 80,113 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.87 | 26,280 |
| Champions League Top 4 | 0 | - | 4.76 | 101,631 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,332,891 |
| Asia Map Quiz | 0 | - | 4.99 | 772,078 |
| Africa Map Quiz | 0 | - | 5.00 | 1,922,784 |
| Oceania Map Quiz | 0 | - | 4.97 | 561,461 |
| Australian Capitals | 0 | - | 4.90 | 52,911 |
| Word Chain - Australia | 0 | - | 4.38 | 36,003 |
| European Physical Geography | 0 | - | 4.19 | 31,785 |
| Word Scramble - European Cities | 0 | - | 3.68 | 17,380 |
| Albania Country Quiz | 0 | - | 4.51 | 33,849 |
| Russian History A-Z | 0 | - | 4.34 | 17,219 |
| Croatia Country Quiz | 0 | - | 4.80 | 36,752 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 37,460 |
| Slovakia... or Slovenia? | 0 | - | 4.79 | 39,458 |
| Hungary Country Quiz | 0 | - | 4.47 | 37,514 |
| Romania Country Quiz | 0 | - | 4.65 | 47,125 |
| History of Austria | 0 | - | 4.68 | 16,260 |
| Geography of the French Empire | 0 | - | 4.50 | 24,969 |
| The French Revolution | 0 | - | 4.44 | 21,778 |
| History of France Quiz | 0 | - | 4.55 | 39,445 |
| History of Ireland Quiz | 0 | - | 4.43 | 18,755 |
| History of Italy | 0 | - | 4.49 | 29,627 |
| Famous Duos Quiz #2 | 0 | - | 4.18 | 110,407 |
| Famous Duos Quiz #1 | 0 | - | 4.18 | 78,008 |
| History of The Netherlands | 0 | - | 4.42 | 15,616 |
| Kings of Spain Quiz | 0 | - | 4.12 | 12,728 |
| Canary Islands | 0 | - | 4.60 | 16,485 |
| Real Madrid 2010's Starting XI | 0 | - | 4.85 | 49,072 |
| Switzerland Immigration by Country | 0 | - | 4.79 | 19,509 |
| British Spellings Quiz | 0 | - | 4.04 | 94,024 |
| British Monopoly Board | 0 | - | 4.50 | 38,668 |
| Asia Geography Quiz #3 | 0 | - | 4.50 | 30,553 |
| Word Chain - Asia | 0 | - | 4.31 | 27,593 |
| South and Central Asia Map Quiz | 0 | - | 4.92 | 78,442 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,272,107 |
| Countries of Africa | 0 | - | 5.00 | 2,135,900 |
| Africa Geography Quiz #2 | 0 | - | 4.57 | 30,973 |
| African East Coast | 0 | - | 4.97 | 83,117 |
| Western Africa Map Quiz | 0 | - | 4.97 | 59,811 |
| Oceania Geography Quiz | 0 | - | 4.53 | 20,750 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 39,522 |
| Australia Map Quiz | 0 | - | 4.94 | 317,008 |
| Hispanic Last Names in the U.S. | 0 | - | 4.29 | 52,416 |
| South American Geography Quiz #2 | 0 | - | 4.70 | 36,805 |
| Word Chain - South America | 0 | - | 4.48 | 21,780 |
| United States Map Quiz | 0 | - | 4.98 | 3,877,616 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 696,216 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 191,158 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.92 | 86,338 |
| Countries That Use the Euro | 0 | - | 4.91 | 61,255 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 333,460 |
| European Geography By Letter - E | 0 | - | 4.19 | 104,681 |
| European Geography By Letter - F | 0 | - | 4.14 | 84,537 |
| European Geography By Letter - H | 0 | - | 4.29 | 87,902 |
| European Geography By Letter - G | 0 | - | 4.24 | 94,542 |
| European Geography By Letter - I | 0 | - | 4.09 | 88,296 |
| European Geography By Letter - K | 0 | - | 4.16 | 64,081 |
| European Geography By Letter - O | 0 | - | 4.27 | 57,386 |
| European Geography By Letter - R | 0 | - | 4.39 | 87,088 |
| European Geography by Letter - W | 0 | - | 4.21 | 77,934 |
| European Geography By Letter - T | 0 | - | 4.39 | 70,531 |
| European Geography By Letter - S #2 | 0 | - | 4.16 | 46,407 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 90,612 |
| Country Codes of Europe | 0 | - | 3.34 | 12,660 |
| The Only European Country ... | 0 | - | 4.94 | 175,609 |
| Embarrassing Chapters in Russian History | 0 | - | 3.80 | 19,253 |
| Austria... or Australia? | 0 | - | 4.79 | 97,321 |
