| Federal Subjects of Russia | 0 | - | 4.95 | 150,058 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,415 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,544 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,284 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,246 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,642 |
| 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 | 70,538 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,493 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,643 |
| Countries That Border Russia | 0 | - | 4.98 | 465,116 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,524 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,483 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,418 |
| Russia Country Quiz | 0 | - | 4.83 | 115,521 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,892 |
| Official European Union Languages | 0 | - | 4.97 | 240,475 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,896 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,605 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,384 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,326 |
| Word Scramble - European Countries | 0 | - | 4.72 | 142,498 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,851 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,698 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,966 |
| History of Russia Quiz | 0 | - | 4.47 | 32,033 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,121 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,179 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,366 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,806 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,776 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,535 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,110 |
| Celtic Nations | 0 | - | 4.61 | 47,131 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,647 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,804 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,239 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,431 |
| German Groups of Things | 0 | - | 4.47 | 38,684 |
| Champions League Winners | 0 | - | 4.92 | 1,018,771 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,701 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,787 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,393 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,122 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,825 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,286 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,941 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,360 |
| Famous Russians | 0 | - | 4.16 | 23,936 |
| Geography of Russia | 0 | - | 4.57 | 21,630 |
| Word Chain - Russia | 0 | - | 4.33 | 15,811 |
| States of Germany | 0 | - | 4.95 | 155,069 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,867 |
| Regions of Italy | 0 | - | 4.92 | 77,337 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,977 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,689 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,971 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 324,663 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,158 |
| South American Geography Quiz #1 | 0 | - | 4.63 | 32,944 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 176,029 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,846 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,562 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,876 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.85 | 35,675 |
| Departments of France | 0 | - | 4.93 | 55,487 |
| Word Chain - France | 0 | - | 4.38 | 42,976 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,800 |
| British Groups of Things | 0 | - | 4.26 | 83,051 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,136 |
| England or Wales? | 0 | - | 4.94 | 46,096 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,627 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,652 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 98,013 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,668 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,814 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,743 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,730 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,955 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,095 |
| Slavic Languages | 0 | - | 4.67 | 54,808 |
| Countries that Border Poland | 0 | - | 4.99 | 173,410 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,817 |
| 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 | 93,259 |
| The Trojan War | 0 | - | 4.83 | 40,126 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,411 |
| Name that Greek Letter | 0 | - | 4.93 | 325,419 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,367 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,736 |
| Roman Emperors | 0 | - | 4.95 | 121,526 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,673 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,117 |
| Word Scramble - Asian Countries | 0 | - | 4.48 | 109,428 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 277,062 |
| Topological Map of Asia Quiz | 0 | - | 4.83 | 20,593 |
| Word Chain - Africa | 0 | - | 4.47 | 31,741 |
| Topological Map of Africa Quiz | 0 | - | 4.81 | 21,700 |
| South American Geography Quiz #2 | 0 | - | 4.40 | 44,417 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 511,312 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,060 |
| 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 | 96,936 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,478 |
| Word Chain - Germany | 0 | - | 4.31 | 22,704 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,757 |
| History of Italy | 0 | - | 4.55 | 32,201 |
| Word Chain - Italy | 0 | - | 4.07 | 23,237 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,579 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| Most Common Last Names in Sweden | 0 | - | 4.50 | 15,507 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,485 |
| Geography of Spain | 0 | - | 4.59 | 22,303 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,428 |
| Name a Valid English City | 0 | - | 4.19 | 16,849 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,494 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 94,525 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,571 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 122,017 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,579 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,135 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,515 |
| European Geography By Letter - M | 0 | - | 4.70 | 133,049 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,443 |
| European Geography By Letter - R | 0 | - | 4.43 | 95,013 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,287 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,925 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,517 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,668 |
| Capitals of French Regions | 0 | - | 4.45 | 16,217 |
| Regions of France | 0 | - | 4.70 | 122,524 |
| France Immigration by Country | 0 | - | 4.70 | 77,045 |
| Famous Germans | 0 | - | 4.50 | 55,903 |
| Capitals of German States | 0 | - | 4.74 | 29,102 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,603 |
| 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 | 90,589 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,662 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,987 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,521 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 104,001 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,617 |
| 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 | 293,066 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 281,149 |
| Famous People from Africa | 0 | - | 4.45 | 11,017 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,767 |
| Four Letter African Geography | 0 | - | 4.68 | 19,897 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,860 |
| Australian Capitals | 0 | - | 4.92 | 62,887 |
| Word Chain - Australia | 0 | - | 4.38 | 38,271 |
| European Physical Geography | 0 | - | 4.26 | 33,623 |
| Word Scramble - European Cities | 0 | - | 3.84 | 18,983 |
| Albania Country Quiz | 0 | - | 4.54 | 39,334 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,549 |
| 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 | 17,994 |
| 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 | 57,773 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,581 |
| Figures from Greek Mythology | 0 | - | 4.92 | 194,650 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,702 |
| 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 | 139,885 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,102 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,507 |
| Champions League Top 4 | 0 | - | 4.78 | 139,772 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,787 |
| Asia Map Quiz | 0 | - | 4.99 | 927,294 |
| Africa Map Quiz | 0 | - | 5.00 | 2,131,567 |
| Random Cities by Clue | 0 | - | 4.53 | 42,894 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,662,805 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,663 |
| Australia Map Quiz | 0 | - | 4.95 | 346,652 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,892 |
| Word Chain - South America | 0 | - | 4.51 | 24,029 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,434 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,579 |
| American Geography Quiz for Dummies | 0 | - | 4.41 | 69,508 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,536 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,514 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 93,012 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,406 |
