| Federal Subjects of Russia | 0 | - | 4.94 | 143,853 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,204 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,817 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,296 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,176 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,718 |
| History of Russia Quiz | 0 | - | 4.49 | 31,784 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,555 |
| Official European Union Languages | 0 | - | 4.97 | 236,450 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,652 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,035 |
| Geography of Russia | 0 | - | 4.57 | 21,423 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,437 |
| Famous Russians | 0 | - | 4.16 | 23,719 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,352 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,518 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,548 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,230 |
| Celtic Nations | 0 | - | 4.69 | 46,805 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,344 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,849 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,779 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,655 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,181 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,825 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,637 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,600 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,003 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,271 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,569 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,695 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,737 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,204 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,149 |
| Slavic Countries | 0 | - | 4.96 | 110,812 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,783 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,538 |
| Famous Germans | 0 | - | 4.50 | 54,594 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,031 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,300 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,597 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,265 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,175 |
| Word Chain - Russia | 0 | - | 4.33 | 15,684 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,145 |
| States of Germany | 0 | - | 4.96 | 149,933 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,984 |
| Regions of Italy | 0 | - | 4.92 | 74,651 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,775 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,220 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,090 |
| Champions League Winners | 0 | - | 4.92 | 995,794 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 65,971 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,123 |
| Countries That Border Russia | 0 | - | 4.98 | 458,762 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,506 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,193 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,400 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,165 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,409 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,855 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,230 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,449 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,125 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,897 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,277 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,487 |
| European Geography A-Z | 0 | - | 4.28 | 48,981 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,394 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,088 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,067 |
| Russia Country Quiz | 0 | - | 4.85 | 113,599 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,824 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,017 |
| Departments of France | 0 | - | 4.93 | 52,745 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,354 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| England or Wales? | 0 | - | 4.94 | 45,298 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,406 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,597 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,964 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,933 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,096 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,771 |
| Slavic Languages | 0 | - | 4.67 | 53,953 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,662 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,595 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,526 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,506 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,550 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,959 |
| France A-Z | 0 | - | 4.16 | 38,047 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,561 |
| Name that Greek Letter | 0 | - | 4.94 | 321,528 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,423 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,237 |
| Switzerland A-Z | 0 | - | 4.45 | 25,498 |
| Africa A-Z | 0 | - | 4.57 | 46,356 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,442 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,067 |
| Embarrassing Chapters in Russian History | 0 | - | 3.73 | 20,229 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,556 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,873 |
| Famous French People | 0 | - | 4.12 | 27,914 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,979 |
| The Trojan War | 0 | - | 4.83 | 39,418 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,477 |
| Famous Irish People | 0 | - | 4.05 | 45,852 |
| History of Italy | 0 | - | 4.55 | 31,806 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,128 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,021 |
| Roman Emperors | 0 | - | 4.95 | 118,394 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,473 |
| Famous Nordic People | 0 | - | 4.34 | 19,841 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,974 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,455 |
| People on Money - England | 0 | - | 4.29 | 16,560 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,309 |
| London A-Z | 0 | - | 4.10 | 40,631 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 51,927 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,936 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,043 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,713 |
| Europe Map Quiz | 0 | - | 5.00 | 4,729,626 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,976 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,602 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,928 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,965 |
| Capitals of French Regions | 0 | - | 4.45 | 15,981 |
| Regions of France | 0 | - | 4.78 | 119,136 |
| France Immigration by Country | 0 | - | 4.72 | 75,938 |
| German Groups of Things | 0 | - | 4.46 | 38,295 |
| Capitals of German States | 0 | - | 4.74 | 28,805 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,090 |
| Germany True or False? | 0 | - | 4.61 | 48,515 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,431 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,594 |
| Ancient Greek Words | 0 | - | 4.92 | 110,631 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,756 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,034 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,913 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,963 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,275 |
| Famous Scottish People | 0 | - | 4.22 | 18,326 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,812 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,374 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,143 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,548 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,053 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,692 |
| Middle East A-Z | 0 | - | 4.47 | 45,768 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,304,249 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,631 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,953 |
| Australian Capitals | 0 | - | 4.92 | 62,589 |
| Canada A-Z | 0 | - | 4.73 | 32,639 |
| European Physical Geography | 0 | - | 4.26 | 33,369 |
| Russian History A-Z | 0 | - | 4.38 | 30,688 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,838 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,762 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,292 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,004 |
| Romania Country Quiz | 0 | - | 4.63 | 53,321 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,921 |
| The French Revolution | 0 | - | 4.46 | 23,769 |
| France Multiple Choice | 0 | - | 4.38 | 40,628 |
| History of France | 0 | - | 4.59 | 55,962 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,379 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,341 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,594 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,675 |
| The Portuguese Empire | 0 | - | 4.54 | 11,985 |
| American to British Word Translation | 0 | - | 4.06 | 117,036 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,694 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,387 |
| Champions League Top 4 | 0 | - | 4.77 | 133,673 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,291 |
| Asia Map Quiz | 0 | - | 4.99 | 906,579 |
| A Quiz About Islam | 0 | - | 4.31 | 48,191 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,419 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,729 |
| Countries of Africa | 0 | - | 5.00 | 2,506,299 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,774 |
| African East Coast | 0 | - | 4.96 | 94,995 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,883 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,757 |
| Australia Map Quiz | 0 | - | 4.94 | 342,367 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,521 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,070 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,084 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,871 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 742,999 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,007 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,173 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,868 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,207 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,384 |
