| Federal Subjects of Russia | 0 | - | 4.95 | 150,061 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,893 |
| Official European Union Languages | 0 | - | 4.97 | 240,476 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,897 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,286 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,646 |
| Countries That Border Russia | 0 | - | 4.98 | 465,119 |
| Russia Country Quiz | 0 | - | 4.83 | 115,521 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,616 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,385 |
| Slavic Languages | 0 | - | 4.67 | 54,809 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,415 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,060 |
| History of Russia Quiz | 0 | - | 4.47 | 32,033 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,121 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,054 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,701 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,179 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,367 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,811 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,777 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,536 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,119 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 72,293 |
| Countries where Arabic is an Official Language | 0 | - | 4.85 | 72,837 |
| Top African Languages on a Map | 0 | - | 4.94 | 75,608 |
| Celtic Nations | 0 | - | 4.61 | 47,131 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,239 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,431 |
| Champions League Winners | 0 | - | 4.92 | 1,018,783 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,544 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,290 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,941 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,366 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,246 |
| Famous Russians | 0 | - | 4.16 | 23,936 |
| Geography of Russia | 0 | - | 4.57 | 21,630 |
| States of Germany | 0 | - | 4.95 | 155,071 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,868 |
| Regions of Italy | 0 | - | 4.92 | 77,337 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,977 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,691 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,971 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,102 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,846 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,530 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,483 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,421 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,877 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,676 |
| Departments of France | 0 | - | 4.93 | 55,490 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,800 |
| England or Wales? | 0 | - | 4.94 | 46,096 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,628 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,814 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,744 |
| Word Scramble - European Countries | 0 | - | 4.72 | 142,500 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,741 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,095 |
| Countries that Border Poland | 0 | - | 4.99 | 173,411 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,819 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,135 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,103 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,087 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,260 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,326 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,851 |
| The Trojan War | 0 | - | 4.83 | 40,126 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,416 |
| Name that Greek Letter | 0 | - | 4.93 | 325,421 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,368 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,736 |
| Roman Emperors | 0 | - | 4.95 | 121,530 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,673 |
| Languages of Spain | 0 | - | 4.36 | 23,476 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 223,329 |
| Word Chain - Russia | 0 | - | 4.33 | 15,811 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,916 |
| Russian History A-Z | 0 | - | 4.35 | 32,330 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,937 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,765 |
| History of Italy | 0 | - | 4.55 | 32,201 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,579 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,485 |
| Top 12 Languages Spoken in Asia | 0 | - | 4.40 | 32,711 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,578 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 122,021 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,585 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,143 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,518 |
| European Geography By Letter - M | 0 | - | 4.70 | 133,053 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,444 |
| European Geography By Letter - R | 0 | - | 4.43 | 95,019 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,288 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,929 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,538 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,596 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,268 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,539 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,494 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,672 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,648 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,806 |
| Capitals of French Regions | 0 | - | 4.45 | 16,217 |
| Regions of France | 0 | - | 4.70 | 122,524 |
| France Immigration by Country | 0 | - | 4.70 | 77,046 |
| Famous Germans | 0 | - | 4.50 | 55,903 |
| German Groups of Things | 0 | - | 4.47 | 38,684 |
| Capitals of German States | 0 | - | 4.74 | 29,103 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,604 |
| Germany True or False? | 0 | - | 4.61 | 49,093 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,623 |
| Ancient Greek Words | 0 | - | 4.93 | 112,742 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,590 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,662 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,988 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,521 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 104,003 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,863 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,966 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,067 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 281,149 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,770 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 377,211 |
| Top World Languages | 0 | - | 4.92 | 832,267 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,876 |
| Australian Capitals | 0 | - | 4.92 | 62,887 |
| European Physical Geography | 0 | - | 4.26 | 33,623 |
| Albania Country Quiz | 0 | - | 4.54 | 39,338 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,550 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,183 |
| Ukraine Country Quiz | 0 | - | 4.43 | 48,077 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,870 |
| Romania Country Quiz | 0 | - | 4.56 | 54,237 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,272 |
| History of Austria | 0 | - | 4.70 | 17,995 |
| Geography of the French Empire | 0 | - | 4.45 | 27,243 |
| The French Revolution | 0 | - | 4.47 | 24,175 |
| France Multiple Choice | 0 | - | 4.39 | 40,881 |
| History of France | 0 | - | 4.61 | 57,774 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,582 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,677 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,706 |
| The Vikings! | 0 | - | 4.46 | 28,434 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,457 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| American to British Word Translation | 0 | - | 4.14 | 139,887 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,508 |
| Champions League Top 4 | 0 | - | 4.78 | 139,774 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,790 |
| Asia Map Quiz | 0 | - | 4.99 | 927,301 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,466 |
| Officially Recognized Languages of India | 0 | - | 4.40 | 31,660 |
| Africa Map Quiz | 0 | - | 5.00 | 2,131,580 |
| Official Languages of South Africa | 0 | - | 4.57 | 26,272 |
| Countries by Official Language | 0 | - | 4.95 | 196,350 |
| Places in their Native Language #1 | 0 | - | 4.85 | 243,730 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 298,112 |
| Countries in their Native Language | 0 | - | 4.99 | 200,056 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,228 |
| English Words of Russian Origin | 0 | - | 4.14 | 51,111 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,664 |
| Australia Map Quiz | 0 | - | 4.95 | 346,652 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,447 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,523 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 93,012 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,407 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,731 |
| European Geography By Letter - E | 0 | - | 4.25 | 122,716 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,906 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,548 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,352 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,873 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,521 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,858 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,776 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,966 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 52,094 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,626 |
| European Geography A-Z | 0 | - | 4.29 | 49,543 |
| Country Codes of Europe | 0 | - | 3.45 | 13,857 |
| The Only European Country ... | 0 | - | 4.91 | 219,807 |
| European Countries NOT in NATO | 0 | - | 4.91 | 62,942 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,958 |
| Seas of Europe | 0 | - | 4.37 | 85,001 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,563 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,979 |
| Poland Country Quiz | 0 | - | 4.20 | 63,862 |
| Embarrassing Chapters in Russian History | 0 | - | 3.68 | 20,377 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,931 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 31,137 |
| Montenegro Country Quiz | 0 | - | 4.61 | 23,909 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,504 |
| Lithuania Country Quiz | 0 | - | 4.63 | 31,855 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,265 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,690 |
| Austria... or Australia? | 0 | - | 4.67 | 104,883 |
