| European Countries by First 2 Letters | 0 | - | 4.95 | 531,643 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,869 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,536 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,226 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,827 |
| Famous Germans | 0 | - | 4.50 | 55,656 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,047 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,552 |
| Official European Union Languages | 0 | - | 4.97 | 239,404 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,420 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,110 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,700 |
| Famous Russians | 0 | - | 4.16 | 23,890 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,213 |
| Famous French People | 0 | - | 4.07 | 35,986 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,992 |
| History of Russia Quiz | 0 | - | 4.47 | 31,983 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,469 |
| Celtic Nations | 0 | - | 4.61 | 47,058 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,633 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,002 |
| European Geography By Letter - C | 0 | - | 4.43 | 122,570 |
| European Geography By Letter - D | 0 | - | 4.50 | 110,008 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,681 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,005 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,828 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,344 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,561 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,246 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,183 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,127 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,811 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,910 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,627 |
| Slavic Countries | 0 | - | 4.96 | 112,160 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,656 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,114 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,606 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,329 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,965 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,576 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,590 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,309 |
| States of Germany | 0 | - | 4.95 | 153,932 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,510 |
| Famous Irish People | 0 | - | 4.05 | 46,048 |
| Regions of Italy | 0 | - | 4.92 | 76,657 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,639 |
| Famous Nordic People | 0 | - | 4.34 | 20,234 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,627 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,981 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,592 |
| Champions League Winners | 0 | - | 4.92 | 1,012,825 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,867 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,683 |
| Geography of Russia | 0 | - | 4.57 | 21,573 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,382 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,254 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,804 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,759 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,072 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,877 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,574 |
| European Geography By Letter - I | 0 | - | 4.09 | 96,271 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,910 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,323 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,394 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,686 |
| European Geography A-Z | 0 | - | 4.29 | 49,429 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,060 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,216 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,366 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,608 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,502 |
| Departments of France | 0 | - | 4.93 | 54,833 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,694 |
| History of The Netherlands | 0 | - | 4.46 | 17,526 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,053 |
| Famous Scottish People | 0 | - | 4.22 | 18,425 |
| England or Wales? | 0 | - | 4.94 | 45,887 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,587 |
| Famous Australians by Description | 0 | - | 4.23 | 28,080 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,699 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,140 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,233 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,756 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,767 |
| Slavic Languages | 0 | - | 4.68 | 54,603 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,123 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,875 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,983 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,965 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,005 |
| France A-Z | 0 | - | 4.16 | 38,306 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,534 |
| Name that Greek Letter | 0 | - | 4.93 | 324,624 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,702 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,585 |
| Switzerland A-Z | 0 | - | 4.45 | 25,738 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,614 |
| Word Chain - Russia | 0 | - | 4.33 | 15,782 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,829 |
| Russian History A-Z | 0 | - | 4.35 | 32,068 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,686 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,209 |
| The Trojan War | 0 | - | 4.83 | 39,928 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,653 |
| History of Italy | 0 | - | 4.55 | 32,106 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,178 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,460 |
| Roman Emperors | 0 | - | 4.95 | 120,849 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,778 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,375 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,562 |
| People on Money - England | 0 | - | 4.29 | 16,634 |
| London A-Z | 0 | - | 4.10 | 40,852 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 42,842 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,267 |
| Famous Chinese People | 0 | - | 4.09 | 11,908 |
| Africa A-Z | 0 | - | 4.57 | 46,734 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,017 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,958 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,401 |
| Europe Map Quiz | 0 | - | 5.00 | 4,779,963 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,442 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,096 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,395 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,363 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,127 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,241 |
| Capitals of French Regions | 0 | - | 4.45 | 16,152 |
| Regions of France | 0 | - | 4.70 | 121,704 |
| France Immigration by Country | 0 | - | 4.70 | 76,821 |
| German Groups of Things | 0 | - | 4.47 | 38,586 |
| Capitals of German States | 0 | - | 4.74 | 29,032 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,479 |
| Germany True or False? | 0 | - | 4.61 | 48,957 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,311 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,897 |
| Ancient Greek Words | 0 | - | 4.93 | 112,212 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,622 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,377 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,633 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,796 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,537 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,356 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,950 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,577 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,097 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,563 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,225 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,176 |
| Middle East A-Z | 0 | - | 4.47 | 46,202 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,322,859 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,754 |
| Australian Capitals | 0 | - | 4.92 | 62,802 |
| Canada A-Z | 0 | - | 4.73 | 32,928 |
| European Physical Geography | 0 | - | 4.26 | 33,571 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,071 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,917 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,676 |
| Romania Country Quiz | 0 | - | 4.63 | 54,024 |
| History of Austria | 0 | - | 4.70 | 17,949 |
| Geography of the French Empire | 0 | - | 4.45 | 27,193 |
| The French Revolution | 0 | - | 4.47 | 24,108 |
| France Multiple Choice | 0 | - | 4.39 | 40,810 |
| History of France | 0 | - | 4.61 | 57,456 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,539 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,964 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,404 |
| The Vikings! | 0 | - | 4.46 | 28,388 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,306 |
| The Portuguese Empire | 0 | - | 4.58 | 12,094 |
| American to British Word Translation | 0 | - | 4.14 | 139,526 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,014 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,767 |
| Champions League Top 4 | 0 | - | 4.77 | 138,122 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,993 |
| Asia Map Quiz | 0 | - | 4.99 | 922,814 |
| A Quiz About Islam | 0 | - | 4.31 | 48,561 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,064 |
| Africa Map Quiz | 0 | - | 5.00 | 2,125,701 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,139 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,228 |
| Australia Map Quiz | 0 | - | 4.95 | 345,721 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,816 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,248 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,576 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,416 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,957 |
| Famous Canadians Quiz | 0 | - | 3.94 | 23,422 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,383 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,823 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,227 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,674 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,825 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,688 |
| Country Codes of Europe | 0 | - | 3.43 | 13,783 |
| The Only European Country ... | 0 | - | 4.91 | 218,279 |
| European Countries NOT in NATO | 0 | - | 4.90 | 62,109 |
