| Federal Subjects of Russia | 0 | - | 4.95 | 148,271 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,714 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,933 |
| History of Russia Quiz | 0 | - | 4.47 | 31,970 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,216 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,471 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,453 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,973 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,023 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,668 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,400 |
| Official European Union Languages | 0 | - | 4.97 | 239,080 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,236 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,506 |
| Famous Russians | 0 | - | 4.16 | 23,880 |
| Geography of Russia | 0 | - | 4.57 | 21,560 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,150 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,939 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,772 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,444 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,096 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,498 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,882 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,436 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,105 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,482 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,283 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,099 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,351 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,938 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,964 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,675 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,824 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,695 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,494 |
| Slavic Countries | 0 | - | 4.96 | 111,993 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,094 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,170 |
| Famous Germans | 0 | - | 4.50 | 55,567 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,520 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,249 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,904 |
| Champions League Winners | 0 | - | 4.92 | 1,010,856 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,871 |
| Celtic Nations | 0 | - | 4.69 | 47,011 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,470 |
| Word Chain - Russia | 0 | - | 4.33 | 15,776 |
| Countries That Border Russia | 0 | - | 4.98 | 463,089 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,191 |
| States of Germany | 0 | - | 4.95 | 153,543 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,359 |
| Regions of Italy | 0 | - | 4.92 | 76,415 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,513 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,643 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,478 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,205 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,771 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,770 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,345 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,693 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,544 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,229 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,976 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,606 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,085 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,212 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,494 |
| European Geography A-Z | 0 | - | 4.29 | 49,387 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,630 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,690 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,515 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,682 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,955 |
| Russia Country Quiz | 0 | - | 4.83 | 114,783 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,530 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,486 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,443 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,906 |
| Famous French People | 0 | - | 4.07 | 35,915 |
| Departments of France | 0 | - | 4.93 | 54,605 |
| The Mafia Quiz | 0 | - | 4.46 | 23,392 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,637 |
| History of The Netherlands | 0 | - | 4.46 | 17,499 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,993 |
| England or Wales? | 0 | - | 4.94 | 45,827 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,216 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,678 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,954 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,825 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,685 |
| Slavic Languages | 0 | - | 4.68 | 54,514 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,949 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,915 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,650 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,098 |
| France A-Z | 0 | - | 4.16 | 38,282 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,429 |
| The Trojan War | 0 | - | 4.83 | 39,845 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,602 |
| Name that Greek Letter | 0 | - | 4.93 | 324,329 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,399 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,682 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,986 |
| Roman Emperors | 0 | - | 4.95 | 120,534 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,531 |
| Switzerland A-Z | 0 | - | 4.45 | 25,700 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,445 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,329 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,794 |
| Russian History A-Z | 0 | - | 4.35 | 31,914 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,581 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,185 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,243 |
| Ancient Greek Words | 0 | - | 4.93 | 112,038 |
| Famous Irish People | 0 | - | 4.05 | 46,029 |
| History of Italy | 0 | - | 4.55 | 32,084 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,056 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,745 |
| Famous Nordic People | 0 | - | 4.34 | 20,198 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,625 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,323 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,549 |
| People on Money - England | 0 | - | 4.29 | 16,627 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,326 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,184 |
| London A-Z | 0 | - | 4.10 | 40,834 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,544 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 42,618 |
| Africa A-Z | 0 | - | 4.57 | 46,706 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,325 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,386 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,389 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,044 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,344 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,319 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,581 |
| Capitals of French Regions | 0 | - | 4.45 | 16,123 |
| Regions of France | 0 | - | 4.70 | 121,411 |
| France Immigration by Country | 0 | - | 4.70 | 76,717 |
| German Groups of Things | 0 | - | 4.46 | 38,551 |
| Capitals of German States | 0 | - | 4.74 | 29,004 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,418 |
| Germany True or False? | 0 | - | 4.61 | 48,919 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,195 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,362 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,322 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,541 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,365 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,508 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,739 |
| Famous Scottish People | 0 | - | 4.22 | 18,418 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,301 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,874 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,526 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,036 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,499 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,923 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,158 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,078 |
| Middle East A-Z | 0 | - | 4.47 | 46,171 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,750 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,320,960 |
| Oceania Map Quiz | 0 | - | 4.98 | 655,766 |
| Australian Capitals | 0 | - | 4.92 | 62,776 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,745 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,199 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,540 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,835 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,352 |
| Canada A-Z | 0 | - | 4.73 | 32,906 |
| European Physical Geography | 0 | - | 4.26 | 33,551 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,774 |
| European Geographic Groups of Four | 0 | - | 4.58 | 16,364 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,327 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,037 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,846 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,593 |
| Romania Country Quiz | 0 | - | 4.63 | 53,949 |
| Lithuania Country Quiz | 0 | - | 4.61 | 31,696 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,113 |
| History of Austria | 0 | - | 4.70 | 17,923 |
| Austria... or Australia? | 0 | - | 4.68 | 104,563 |
| Geography of the French Empire | 0 | - | 4.45 | 27,168 |
| Word Chain - France | 0 | - | 4.38 | 42,866 |
| The French Revolution | 0 | - | 4.47 | 24,077 |
| France Multiple Choice | 0 | - | 4.39 | 40,783 |
| History of France | 0 | - | 4.61 | 57,346 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,114 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,968 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,949 |
| Italian Foods | 0 | - | 4.30 | 73,008 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,462 |
| Byzantine History | 0 | - | 4.91 | 28,940 |
| Byzantine Emperors | 0 | - | 4.92 | 14,414 |
| The Vikings! | 0 | - | 4.46 | 28,375 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,246 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| Canary Islands | 0 | - | 4.62 | 17,499 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 68,219 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,864 |
