| Federal Subjects of Russia | 0 | - | 4.94 | 145,514 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,134 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,961 |
| History of Russia Quiz | 0 | - | 4.49 | 31,855 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,640 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,725 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,398 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,588 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,516 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,879 |
| Official European Union Languages | 0 | - | 4.97 | 237,744 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,372 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,693 |
| Famous Russians | 0 | - | 4.16 | 23,779 |
| Geography of Russia | 0 | - | 4.57 | 21,488 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,771 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,683 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,813 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,323 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,709 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,149 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,126 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,005 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,462 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,359 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,047 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,825 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,454 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,632 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,815 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,465 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,653 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,798 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,558 |
| Slavic Countries | 0 | - | 4.96 | 111,300 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,919 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,775 |
| Famous Germans | 0 | - | 4.50 | 54,865 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,211 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 31,782 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,930 |
| Champions League Winners | 0 | - | 4.92 | 1,001,223 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,899 |
| Celtic Nations | 0 | - | 4.69 | 46,878 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,647 |
| Word Chain - Russia | 0 | - | 4.33 | 15,728 |
| Countries That Border Russia | 0 | - | 4.98 | 460,480 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,565 |
| States of Germany | 0 | - | 4.96 | 151,221 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,618 |
| Regions of Italy | 0 | - | 4.92 | 75,271 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 50,259 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,254 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,783 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,463 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,625 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,188 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,453 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,874 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,124 |
| European Geography By Letter - G | 0 | - | 4.27 | 101,743 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,690 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,377 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,098 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,441 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,666 |
| European Geography A-Z | 0 | - | 4.29 | 49,126 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,309 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,167 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,950 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,818 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,183 |
| Russia Country Quiz | 0 | - | 4.85 | 114,091 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,128 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,958 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,210 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,652 |
| Departments of France | 0 | - | 4.93 | 53,419 |
| The Mafia Quiz | 0 | - | 4.46 | 23,256 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,454 |
| History of The Netherlands | 0 | - | 4.46 | 17,371 |
| England or Wales? | 0 | - | 4.94 | 45,508 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,346 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,630 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,329 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,945 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,331 |
| Slavic Languages | 0 | - | 4.68 | 54,177 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,735 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,680 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,594 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,003 |
| France A-Z | 0 | - | 4.16 | 38,117 |
| The Trojan War | 0 | - | 4.83 | 39,584 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,897 |
| Name that Greek Letter | 0 | - | 4.93 | 322,652 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,238 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,531 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,316 |
| Roman Emperors | 0 | - | 4.95 | 119,359 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,368 |
| Switzerland A-Z | 0 | - | 4.45 | 25,583 |
| Africa A-Z | 0 | - | 4.57 | 46,511 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,636 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,275 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,651 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,164 |
| Famous French People | 0 | - | 4.12 | 28,151 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,085 |
| Olympian Gods Quiz | 0 | - | 4.96 | 498,633 |
| Ancient Greek Words | 0 | - | 4.93 | 111,152 |
| Famous Irish People | 0 | - | 4.05 | 45,915 |
| History of Italy | 0 | - | 4.55 | 31,909 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,493 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,574 |
| Famous Nordic People | 0 | - | 4.34 | 19,999 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,571 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,105 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,503 |
| People on Money - England | 0 | - | 4.29 | 16,591 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,522 |
| Name Every Beatles Song | 0 | - | 4.97 | 235,154 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,194 |
| London A-Z | 0 | - | 4.10 | 40,711 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,173 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,227 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,476 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,974 |
| Europe Map Quiz | 0 | - | 5.00 | 4,747,793 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,151 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,799 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,088 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,131 |
| Capitals of French Regions | 0 | - | 4.45 | 16,021 |
| Regions of France | 0 | - | 4.77 | 120,038 |
| France Immigration by Country | 0 | - | 4.72 | 76,250 |
| German Groups of Things | 0 | - | 4.46 | 38,392 |
| Capitals of German States | 0 | - | 4.74 | 28,898 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,218 |
| Germany True or False? | 0 | - | 4.61 | 48,668 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,757 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 435,316 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,858 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,099 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,164 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,869 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,472 |
| Famous Scottish People | 0 | - | 4.22 | 18,364 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,969 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,529 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,267 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,726 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,199 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,247 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,856 |
| Middle East A-Z | 0 | - | 4.47 | 45,927 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,311,001 |
| Africa Map Quiz | 0 | - | 5.00 | 2,111,319 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,897 |
| Australian Capitals | 0 | - | 4.92 | 62,667 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,996 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,479 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,381 |
| United States Map Quiz | 0 | - | 4.98 | 4,149,252 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,370 |
| Canada A-Z | 0 | - | 4.73 | 32,729 |
| European Physical Geography | 0 | - | 4.26 | 33,434 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,543 |
| Russian History A-Z | 0 | - | 4.38 | 31,439 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,044 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,867 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,520 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,248 |
| Romania Country Quiz | 0 | - | 4.63 | 53,607 |
| Latvia Country Quiz | 0 | - | 4.75 | 31,908 |
| History of Austria | 0 | - | 4.70 | 17,810 |
| Austria... or Australia? | 0 | - | 4.68 | 104,131 |
| Geography of the French Empire | 0 | - | 4.45 | 27,002 |
| Word Chain - France | 0 | - | 4.38 | 42,685 |
| The French Revolution | 0 | - | 4.46 | 23,872 |
| France Multiple Choice | 0 | - | 4.38 | 40,686 |
| History of France | 0 | - | 4.59 | 56,656 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,439 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,880 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,846 |
| Figures from Greek Mythology | 0 | - | 4.91 | 185,947 |
| Italian Foods | 0 | - | 4.31 | 72,489 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,162 |
| Byzantine History | 0 | - | 4.91 | 28,718 |
| The Vikings! | 0 | - | 4.46 | 28,290 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,917 |
| The Portuguese Empire | 0 | - | 4.58 | 12,033 |
| Canary Islands | 0 | - | 4.61 | 17,443 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,821 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,466 |
| American to British Word Translation | 0 | - | 4.13 | 138,394 |
| British Spellings | 0 | - | 4.06 | 99,363 |
| British Groups of Things | 0 | - | 4.25 | 82,790 |
| British Acronyms | 0 | - | 4.39 | 45,716 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,822 |
