| Federal Subjects of Russia | 0 | - | 4.95 | 150,023 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,240 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,169 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,234 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,268 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,231 |
| Countries That Border Russia | 0 | - | 4.98 | 465,070 |
| Russia Country Quiz | 0 | - | 4.83 | 115,501 |
| Famous Germans | 0 | - | 4.50 | 55,894 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,580 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,887 |
| Official European Union Languages | 0 | - | 4.97 | 240,447 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,875 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,553 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,812 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,373 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,412 |
| Famous French People | 0 | - | 4.05 | 36,189 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,120 |
| History of Russia Quiz | 0 | - | 4.47 | 32,031 |
| Celtic Nations | 0 | - | 4.61 | 47,130 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,509 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,951 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,499 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,035 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,446 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,985 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,395 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,980 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,250 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,889 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,634 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,330 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,740 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,235 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,424 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,170 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,773 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,527 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,003 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,540 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,032 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,931 |
| Russian History A-Z | 0 | - | 4.35 | 32,325 |
| States of Germany | 0 | - | 4.95 | 155,031 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,853 |
| Famous Irish People | 0 | - | 4.05 | 46,087 |
| Regions of Italy | 0 | - | 4.92 | 77,310 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,961 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,652 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,672 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,949 |
| Champions League Winners | 0 | - | 4.92 | 1,018,561 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,171 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,840 |
| Geography of Russia | 0 | - | 4.57 | 21,627 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,499 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| European Geography By Letter - E | 0 | - | 4.23 | 121,546 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,830 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,495 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,287 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,823 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,473 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,819 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,752 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 52,058 |
| European Geography A-Z | 0 | - | 4.29 | 49,536 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,485 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,450 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,386 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,865 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.83 | 35,670 |
| Departments of France | 0 | - | 4.93 | 55,456 |
| The Mafia Quiz | 0 | - | 4.46 | 23,454 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,794 |
| History of The Netherlands | 0 | - | 4.46 | 17,580 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,234 |
| Famous Scottish People | 0 | - | 4.22 | 18,445 |
| England or Wales? | 0 | - | 4.94 | 46,091 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,578 |
| Famous Australians by Description | 0 | - | 4.23 | 28,199 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,742 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,486 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,569 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,943 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,089 |
| Slavic Languages | 0 | - | 4.67 | 54,801 |
| Countries that Border Poland | 0 | - | 4.99 | 173,400 |
| Countries that Border Hungary | 0 | - | 4.98 | 105,129 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,101 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,082 |
| Countries Bordering Serbia | 0 | - | 4.96 | 93,248 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,320 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,689 |
| France A-Z | 0 | - | 4.16 | 38,371 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,317 |
| Name that Greek Letter | 0 | - | 4.93 | 325,394 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,671 |
| Switzerland A-Z | 0 | - | 4.45 | 25,802 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,052 |
| Word Chain - Russia | 0 | - | 4.33 | 15,810 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,910 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,794 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,927 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,264 |
| The Trojan War | 0 | - | 4.83 | 40,116 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,340 |
| History of Italy | 0 | - | 4.55 | 32,196 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,565 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,725 |
| Roman Emperors | 0 | - | 4.95 | 121,512 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,863 |
| Famous Nordic People | 0 | - | 4.34 | 20,359 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,481 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,585 |
| People on Money - England | 0 | - | 4.29 | 21,130 |
| London A-Z | 0 | - | 4.10 | 40,917 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,109 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 281,124 |
| Famous Chinese People | 0 | - | 4.09 | 11,935 |
| Africa A-Z | 0 | - | 4.57 | 46,808 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,750 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,615 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,007 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,588 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,259 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,531 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,484 |
| Capitals of French Regions | 0 | - | 4.45 | 16,216 |
| Regions of France | 0 | - | 4.70 | 122,486 |
| France Immigration by Country | 0 | - | 4.70 | 77,037 |
| German Groups of Things | 0 | - | 4.47 | 38,682 |
| Capitals of German States | 0 | - | 4.74 | 29,101 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,601 |
| Germany True or False? | 0 | - | 4.61 | 49,087 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,609 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,689 |
| Ancient Greek Words | 0 | - | 4.93 | 112,730 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,976 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,511 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,994 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,888 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,046 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,560 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,178 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,742 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,304 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,746 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,419 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,428 |
| Middle East A-Z | 0 | - | 4.47 | 46,280 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,328,252 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,759 |
| Australian Capitals | 0 | - | 4.92 | 62,883 |
| Canada A-Z | 0 | - | 4.73 | 33,003 |
| European Physical Geography | 0 | - | 4.26 | 33,621 |
| Albania Country Quiz | 0 | - | 4.54 | 39,321 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,541 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,180 |
| Ukraine Country Quiz | 0 | - | 4.43 | 48,069 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,856 |
| Romania Country Quiz | 0 | - | 4.63 | 54,229 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,268 |
| History of Austria | 0 | - | 4.70 | 17,992 |
| Geography of the French Empire | 0 | - | 4.45 | 27,241 |
| The French Revolution | 0 | - | 4.47 | 24,173 |
| France Multiple Choice | 0 | - | 4.39 | 40,881 |
| History of France | 0 | - | 4.61 | 57,762 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,581 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 440,625 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,654 |
| The Vikings! | 0 | - | 4.46 | 28,432 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,452 |
| The Portuguese Empire | 0 | - | 4.58 | 12,120 |
| American to British Word Translation | 0 | - | 4.14 | 139,867 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,097 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,861 |
| Champions League Top 4 | 0 | - | 4.78 | 139,727 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,453,686 |
| Asia Map Quiz | 0 | - | 4.99 | 927,147 |
| A Quiz About Islam | 0 | - | 4.32 | 48,670 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,251 |
| Africa Map Quiz | 0 | - | 5.00 | 2,131,358 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,864 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,641 |
| Australia Map Quiz | 0 | - | 4.95 | 346,604 |
| U.S. Geography by Letter - B | 0 | - | 4.54 | 70,177 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 58,637 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,658 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,262 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 750,527 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 214,472 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 93,011 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,356 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,684 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,960 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,595 |
| Country Codes of Europe | 0 | - | 3.45 | 13,857 |
