| Federal Subjects of Russia | 0 | - | 4.95 | 145,774 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,171 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,162 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,669 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,760 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,505 |
| Countries That Border Russia | 0 | - | 4.98 | 460,687 |
| Russia Country Quiz | 0 | - | 4.85 | 114,143 |
| Famous Germans | 0 | - | 4.50 | 54,897 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,993 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,911 |
| Official European Union Languages | 0 | - | 4.97 | 237,884 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,448 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,941 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,531 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,639 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,802 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,700 |
| History of Russia Quiz | 0 | - | 4.49 | 31,861 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,338 |
| Celtic Nations | 0 | - | 4.69 | 46,886 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,746 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,171 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,143 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,030 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,494 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,407 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,068 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,843 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,470 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,671 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,831 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,633 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,911 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,929 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,810 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,007 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,233 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,815 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 353,266 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,989 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,705 |
| Famous French People | 0 | - | 4.12 | 28,167 |
| States of Germany | 0 | - | 4.96 | 151,451 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,713 |
| Famous Irish People | 0 | - | 4.05 | 45,922 |
| Regions of Italy | 0 | - | 4.92 | 75,359 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 51,231 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,573 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,382 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,813 |
| Champions League Winners | 0 | - | 4.92 | 1,002,118 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,214 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,343 |
| Geography of Russia | 0 | - | 4.57 | 21,496 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,485 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,641 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,472 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,890 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,148 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,766 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,707 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,392 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,111 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,455 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,678 |
| European Geography A-Z | 0 | - | 4.29 | 49,149 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 232,159 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,966 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,350 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,156 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,242 |
| Departments of France | 0 | - | 4.93 | 53,502 |
| The Mafia Quiz | 0 | - | 4.46 | 23,261 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,476 |
| History of The Netherlands | 0 | - | 4.46 | 17,379 |
| Famous Scottish People | 0 | - | 4.22 | 18,366 |
| England or Wales? | 0 | - | 4.94 | 45,535 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,468 |
| Famous Australians by Description | 0 | - | 4.23 | 27,821 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,636 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,386 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,070 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,368 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,225 |
| Slavic Languages | 0 | - | 4.68 | 54,208 |
| Countries that Border Poland | 0 | - | 4.99 | 171,913 |
| Russian History A-Z | 0 | - | 4.38 | 31,486 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,008 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,758 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,701 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,155 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,675 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,595 |
| France A-Z | 0 | - | 4.16 | 38,131 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 645,287 |
| Name that Greek Letter | 0 | - | 4.93 | 322,819 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,545 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,389 |
| Switzerland A-Z | 0 | - | 4.45 | 25,594 |
| Africa A-Z | 0 | - | 4.57 | 46,534 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,613 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,718 |
| Word Chain - Russia | 0 | - | 4.33 | 15,731 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,669 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,352 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,195 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,096 |
| The Trojan War | 0 | - | 4.83 | 39,611 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,342 |
| History of Italy | 0 | - | 4.55 | 31,917 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,546 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,353 |
| Roman Emperors | 0 | - | 4.95 | 119,486 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,593 |
| Famous Nordic People | 0 | - | 4.34 | 20,014 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,128 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,506 |
| People on Money - England | 0 | - | 4.29 | 16,597 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,578 |
| London A-Z | 0 | - | 4.10 | 40,721 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,291 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,403 |
| Famous Chinese People | 0 | - | 4.09 | 11,847 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,009 |
| Europe Map Quiz | 0 | - | 5.00 | 4,749,966 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,168 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,823 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,106 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,146 |
| Capitals of French Regions | 0 | - | 4.45 | 16,028 |
| Regions of France | 0 | - | 4.78 | 120,168 |
| France Immigration by Country | 0 | - | 4.70 | 76,299 |
| German Groups of Things | 0 | - | 4.46 | 38,404 |
| Capitals of German States | 0 | - | 4.74 | 28,908 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,241 |
| Germany True or False? | 0 | - | 4.61 | 48,686 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,785 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,959 |
| Ancient Greek Words | 0 | - | 4.93 | 111,210 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,134 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,177 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,943 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,302 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,286 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,979 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,540 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,283 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,745 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,212 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,866 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,652 |
| Middle East A-Z | 0 | - | 4.47 | 45,941 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,311,912 |
| Africa Map Quiz | 0 | - | 5.00 | 2,112,483 |
| Oceania Map Quiz | 0 | - | 4.98 | 639,324 |
| Australian Capitals | 0 | - | 4.92 | 62,676 |
| Canada A-Z | 0 | - | 4.73 | 32,742 |
| European Physical Geography | 0 | - | 4.26 | 33,442 |
| Albania Country Quiz | 0 | - | 4.54 | 38,867 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,075 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,882 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,551 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,273 |
| Romania Country Quiz | 0 | - | 4.63 | 53,638 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,940 |
| History of Austria | 0 | - | 4.70 | 17,819 |
| Geography of the French Empire | 0 | - | 4.45 | 27,012 |
| The French Revolution | 0 | - | 4.46 | 23,881 |
| France Multiple Choice | 0 | - | 4.38 | 40,689 |
| History of France | 0 | - | 4.59 | 56,707 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,447 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,607 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,909 |
| The Vikings! | 0 | - | 4.46 | 28,304 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,961 |
| The Portuguese Empire | 0 | - | 4.58 | 12,039 |
| American to British Word Translation | 0 | - | 4.13 | 138,531 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,834 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,517 |
| Champions League Top 4 | 0 | - | 4.77 | 135,309 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,445,100 |
| Asia Map Quiz | 0 | - | 4.99 | 912,361 |
| A Quiz About Islam | 0 | - | 4.31 | 48,359 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,696 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,584 |
| Countries of Africa | 0 | - | 5.00 | 2,525,265 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,420 |
| African East Coast | 0 | - | 4.96 | 95,648 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,486 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,328 |
| Australia Map Quiz | 0 | - | 4.94 | 343,523 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,018 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,499 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,390 |
| United States Map Quiz | 0 | - | 4.98 | 4,150,326 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,701 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,377 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,517 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,203 |
