| Federal Subjects of Russia | 0 | - | 4.94 | 145,324 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,747 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,818 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,316 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,343 |
| History of Russia Quiz | 0 | - | 4.49 | 31,844 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,802 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,740 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,090 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,854 |
| Official European Union Languages | 0 | - | 4.97 | 237,671 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,318 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,575 |
| Geography of Russia | 0 | - | 4.57 | 21,479 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,299 |
| Word Chain - Russia | 0 | - | 4.33 | 15,723 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,570 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,668 |
| Celtic Nations | 0 | - | 4.69 | 46,873 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,136 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,777 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,080 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,121 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,106 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,349 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,486 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,743 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,529 |
| Slavic Countries | 0 | - | 4.96 | 111,259 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,901 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,751 |
| German Groups of Things | 0 | - | 4.46 | 38,382 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,198 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,745 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,548 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,205 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,730 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,622 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,599 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,690 |
| Famous Russians | 0 | - | 4.16 | 23,773 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,537 |
| States of Germany | 0 | - | 4.96 | 151,095 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,517 |
| Regions of Italy | 0 | - | 4.92 | 75,218 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 48,445 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,188 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,751 |
| Champions League Winners | 0 | - | 4.92 | 1,000,756 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 320,761 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,296 |
| Countries That Border Russia | 0 | - | 4.98 | 460,356 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,620 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,783 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,764 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,526 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 27,896 |
| Russia Country Quiz | 0 | - | 4.85 | 114,048 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,095 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,191 |
| Departments of France | 0 | - | 4.93 | 53,312 |
| Word Chain - France | 0 | - | 4.38 | 42,677 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,441 |
| British Groups of Things | 0 | - | 4.25 | 82,778 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,994 |
| England or Wales? | 0 | - | 4.94 | 45,492 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,259 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,330 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,055 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,509 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,627 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,853 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,316 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,133 |
| Slavic Languages | 0 | - | 4.68 | 54,152 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,933 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,725 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,668 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,635 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,653 |
| Name that Greek Letter | 0 | - | 4.93 | 322,556 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,525 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,358 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,969 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,494 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 274,193 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,401 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,580 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,267 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,642 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,141 |
| Word Chain - Germany | 0 | - | 4.31 | 22,527 |
| The Trojan War | 0 | - | 4.83 | 39,569 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,175 |
| History of Italy | 0 | - | 4.55 | 31,900 |
| Word Chain - Italy | 0 | - | 4.07 | 23,135 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,443 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,288 |
| Roman Emperors | 0 | - | 4.95 | 119,246 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,567 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,337 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,094 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,300 |
| Name a Valid English City | 0 | - | 4.19 | 16,673 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,165 |
| Famous People from Africa | 0 | - | 4.45 | 10,923 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,904 |
| Word Chain - Africa | 0 | - | 4.47 | 31,543 |
| Four Letter African Geography | 0 | - | 4.67 | 18,650 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,015 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,703 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,687 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,137 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,113 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,992 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,447 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,332 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,031 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,809 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,443 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,614 |
| Europe Map Quiz | 0 | - | 5.00 | 4,746,125 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,800 |
| Capitals of French Regions | 0 | - | 4.45 | 16,019 |
| Regions of France | 0 | - | 4.77 | 119,976 |
| France Immigration by Country | 0 | - | 4.72 | 76,203 |
| Famous Germans | 0 | - | 4.50 | 54,840 |
| Capitals of German States | 0 | - | 4.74 | 28,894 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,203 |
| Germany True or False? | 0 | - | 4.61 | 48,664 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,727 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,438 |
| Ancient Greek Words | 0 | - | 4.93 | 111,103 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,886 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,063 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,156 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,834 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,067 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,142 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,407 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,428 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,193 |
| Astronomy Decoder | 0 | - | 4.50 | 37,933 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,727 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,636 |
| Australian Capitals | 0 | - | 4.92 | 62,657 |
| Word Chain - Australia | 0 | - | 4.37 | 38,077 |
| European Physical Geography | 0 | - | 4.26 | 33,425 |
| Word Scramble - European Cities | 0 | - | 3.83 | 18,862 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,034 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,858 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,503 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,228 |
| Romania Country Quiz | 0 | - | 4.63 | 53,583 |
| History of Austria | 0 | - | 4.70 | 17,800 |
| Geography of the French Empire | 0 | - | 4.45 | 26,999 |
| The French Revolution | 0 | - | 4.46 | 23,862 |
| France Multiple Choice | 0 | - | 4.38 | 40,680 |
| History of France | 0 | - | 4.59 | 56,635 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,423 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,168 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,836 |
| The Vikings! | 0 | - | 4.46 | 28,287 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,879 |
| The Portuguese Empire | 0 | - | 4.58 | 12,028 |
| American to British Word Translation | 0 | - | 4.13 | 138,296 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,814 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,444 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,463 |
| Champions League Top 4 | 0 | - | 4.77 | 134,968 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,952 |
| Asia Map Quiz | 0 | - | 4.99 | 911,007 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,604,471 |
| Countries of Africa | 0 | - | 5.00 | 2,521,593 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,270 |
| African East Coast | 0 | - | 4.96 | 95,526 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,361 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,015 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,209 |
| Australia Map Quiz | 0 | - | 4.94 | 343,285 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,674 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,262 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,522 |
| Word Chain - South America | 0 | - | 4.51 | 23,835 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,581 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,206 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,090 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,468 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,949 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,235 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,441 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,860 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,106 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,726 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,678 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,362 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,090 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,432 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,650 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,327 |
