| Federal Subjects of Russia | 0 | - | 4.95 | 149,618 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,336 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,637 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,513 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,926 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,021 |
| Countries That Border Russia | 0 | - | 4.98 | 464,614 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,990 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,006 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,014 |
| Russia Country Quiz | 0 | - | 4.83 | 115,347 |
| German Groups of Things | 0 | - | 4.47 | 38,645 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,766 |
| Official European Union Languages | 0 | - | 4.97 | 239,870 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,698 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,044 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,360 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,295 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,065 |
| British Groups of Things | 0 | - | 4.26 | 83,025 |
| History of Russia Quiz | 0 | - | 4.47 | 32,009 |
| Celtic Nations | 0 | - | 4.61 | 47,106 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,536 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,199 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,473 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,438 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,053 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,895 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,020 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,560 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,753 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,204 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,353 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,708 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,475 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,947 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,694 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,021 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,808 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,937 |
| Famous Russians | 0 | - | 4.16 | 23,917 |
| Word Chain - Russia | 0 | - | 4.33 | 15,798 |
| States of Germany | 0 | - | 4.95 | 154,627 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,724 |
| Regions of Italy | 0 | - | 4.92 | 77,134 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,825 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,400 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,790 |
| Champions League Winners | 0 | - | 4.92 | 1,016,641 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,589 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,765 |
| Geography of Russia | 0 | - | 4.57 | 21,606 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 324,296 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,597 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,905 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,775 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,603 |
| Departments of France | 0 | - | 4.93 | 55,228 |
| Word Chain - France | 0 | - | 4.38 | 42,946 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,753 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,115 |
| England or Wales? | 0 | - | 4.94 | 45,984 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,239 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,409 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,776 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,475 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,755 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,723 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,665 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,869 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,977 |
| Slavic Languages | 0 | - | 4.67 | 54,714 |
| Countries that Border Poland | 0 | - | 4.99 | 173,214 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,028 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,059 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,041 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,121 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,105 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,229 |
| Name that Greek Letter | 0 | - | 4.93 | 325,072 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,746 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,634 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,092 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 109,325 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 276,763 |
| Word Chain - Africa | 0 | - | 4.47 | 31,721 |
| California Groups of Things | 0 | - | 4.26 | 45,778 |
| New York Groups of Things | 0 | - | 4.39 | 72,184 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,593 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,885 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,881 |
| Russian History A-Z | 0 | - | 4.35 | 32,246 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,646 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,834 |
| Word Chain - Germany | 0 | - | 4.31 | 22,687 |
| The Trojan War | 0 | - | 4.83 | 40,006 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,019 |
| History of Italy | 0 | - | 4.55 | 32,159 |
| Word Chain - Italy | 0 | - | 4.07 | 23,225 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,408 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,612 |
| Roman Emperors | 0 | - | 4.95 | 121,273 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,830 |
| Most Common Last Names in Sweden | 0 | - | 4.50 | 15,487 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,433 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,417 |
| Name a Valid English City | 0 | - | 4.19 | 16,830 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,795 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,469 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,429 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 94,412 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,272 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,670 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,126 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,215 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,196 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,668 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,223 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,839 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,124 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,712 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,578 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,517 |
| Capitals of French Regions | 0 | - | 4.45 | 16,185 |
| Regions of France | 0 | - | 4.70 | 122,168 |
| France Immigration by Country | 0 | - | 4.70 | 76,955 |
| Famous Germans | 0 | - | 4.50 | 55,808 |
| Capitals of German States | 0 | - | 4.74 | 29,076 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,551 |
| Germany True or False? | 0 | - | 4.61 | 49,030 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,509 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,911 |
| Ancient Greek Words | 0 | - | 4.93 | 112,527 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,423 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,799 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,415 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,854 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,429 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,847 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,666 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,741 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,368 |
| Famous People from Africa | 0 | - | 4.45 | 11,012 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,099 |
| Four Letter African Geography | 0 | - | 4.68 | 19,801 |
| Groups of Things - The Bible | 0 | - | 4.44 | 55,570 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,694 |
| Australian Capitals | 0 | - | 4.92 | 62,839 |
| Word Chain - Australia | 0 | - | 4.38 | 38,250 |
| European Physical Geography | 0 | - | 4.26 | 33,601 |
| Word Scramble - European Cities | 0 | - | 3.84 | 18,969 |
| Albania Country Quiz | 0 | - | 4.54 | 39,268 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,475 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,137 |
| Ukraine Country Quiz | 0 | - | 4.43 | 48,001 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,797 |
| Romania Country Quiz | 0 | - | 4.63 | 54,154 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,227 |
| History of Austria | 0 | - | 4.70 | 17,978 |
| Geography of the French Empire | 0 | - | 4.45 | 27,221 |
| The French Revolution | 0 | - | 4.47 | 24,151 |
| France Multiple Choice | 0 | - | 4.39 | 40,856 |
| History of France | 0 | - | 4.61 | 57,654 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,562 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,969 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,532 |
| The Vikings! | 0 | - | 4.46 | 28,409 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,398 |
| The Portuguese Empire | 0 | - | 4.58 | 12,113 |
| American to British Word Translation | 0 | - | 4.14 | 139,734 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,068 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,391 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,826 |
| Champions League Top 4 | 0 | - | 4.78 | 139,236 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,758 |
| Asia Map Quiz | 0 | - | 4.99 | 925,605 |
| Africa Map Quiz | 0 | - | 5.00 | 2,129,298 |
| Famous Duos #2 | 0 | - | 4.18 | 117,655 |
| Famous Duos Quiz #1 | 0 | - | 4.15 | 84,364 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,655,157 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,139 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,495 |
| Australia Map Quiz | 0 | - | 4.95 | 346,254 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,864 |
| South American Geography Quiz #2 | 0 | - | 4.41 | 44,205 |
| South American Geography Quiz #1 | 0 | - | 4.63 | 32,914 |
| Word Chain - South America | 0 | - | 4.51 | 24,007 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,038 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 749,936 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,446 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,065 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,948 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,927 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,329 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,331 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,592 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,298 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,066 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,657 |
