| Federal Subjects of Russia | 0 | - | 4.95 | 148,004 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,111 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,593 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,429 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,310 |
| History of Russia Quiz | 0 | - | 4.47 | 31,950 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,924 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,383 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,634 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,324 |
| Official European Union Languages | 0 | - | 4.97 | 238,928 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,131 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,061 |
| Geography of Russia | 0 | - | 4.57 | 21,555 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,879 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,984 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,916 |
| Celtic Nations | 0 | - | 4.69 | 46,996 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,354 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,009 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,300 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,296 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,536 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,232 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,061 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,561 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,405 |
| Slavic Countries | 0 | - | 4.96 | 111,882 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,075 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,130 |
| German Groups of Things | 0 | - | 4.46 | 38,526 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,474 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,195 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,192 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,393 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,277 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,389 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 86,575 |
| Famous Russians | 0 | - | 4.16 | 23,868 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,096 |
| States of Germany | 0 | - | 4.95 | 153,196 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,284 |
| Regions of Italy | 0 | - | 4.92 | 76,237 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,428 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,411 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,415 |
| Champions League Winners | 0 | - | 4.92 | 1,009,902 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 323,170 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,585 |
| Countries That Border Russia | 0 | - | 4.98 | 462,837 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,754 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,604 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,843 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,749 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 28,303 |
| Russia Country Quiz | 0 | - | 4.83 | 114,697 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,469 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,414 |
| Departments of France | 0 | - | 4.93 | 54,467 |
| Word Chain - France | 0 | - | 4.38 | 42,843 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,615 |
| British Groups of Things | 0 | - | 4.25 | 82,910 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,055 |
| England or Wales? | 0 | - | 4.94 | 45,799 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,003 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,351 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,091 |
| Word Chain - Africa | 0 | - | 4.47 | 31,653 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,646 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,675 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,611 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,654 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,642 |
| Slavic Languages | 0 | - | 4.67 | 54,466 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,425 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,925 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,882 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,854 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,898 |
| Name that Greek Letter | 0 | - | 4.93 | 324,173 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,665 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,515 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,043 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 109,029 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 275,903 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,600 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,351 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,325 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,775 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,542 |
| Word Chain - Germany | 0 | - | 4.31 | 22,615 |
| The Trojan War | 0 | - | 4.83 | 39,797 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,248 |
| History of Italy | 0 | - | 4.55 | 32,053 |
| Word Chain - Italy | 0 | - | 4.07 | 23,180 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,960 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,654 |
| Roman Emperors | 0 | - | 4.95 | 120,398 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,720 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,436 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,295 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,359 |
| Name a Valid English City | 0 | - | 4.19 | 16,752 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,703 |
| Famous People from Africa | 0 | - | 4.45 | 10,964 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,005 |
| Four Letter African Geography | 0 | - | 4.67 | 19,471 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,264 |
| Name a Valid Answer - United States #1 | 0 | - | 4.63 | 94,133 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,957 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,364 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,753 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,313 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,983 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,311 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,926 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,197 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,006 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,279 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,831 |
| Europe Map Quiz | 0 | - | 5.00 | 4,771,279 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,882 |
| Capitals of French Regions | 0 | - | 4.45 | 16,109 |
| Regions of France | 0 | - | 4.72 | 121,240 |
| France Immigration by Country | 0 | - | 4.70 | 76,684 |
| Famous Germans | 0 | - | 4.50 | 55,533 |
| Capitals of German States | 0 | - | 4.74 | 28,990 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,401 |
| Germany True or False? | 0 | - | 4.61 | 48,892 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,140 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,902 |
| Ancient Greek Words | 0 | - | 4.93 | 111,914 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,803 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,499 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,339 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,444 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,033 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,103 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,552 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,606 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,284 |
| Word Chain - The Bible | 0 | - | 4.48 | 50,822 |
| Africa Map Quiz | 0 | - | 5.00 | 2,121,828 |
| Oceania Map Quiz | 0 | - | 4.98 | 652,223 |
| Australian Capitals | 0 | - | 4.92 | 62,754 |
| Word Chain - Australia | 0 | - | 4.38 | 38,171 |
| European Physical Geography | 0 | - | 4.26 | 33,541 |
| Word Scramble - European Cities | 0 | - | 3.84 | 18,933 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,287 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,019 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,800 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,548 |
| Romania Country Quiz | 0 | - | 4.63 | 53,905 |
| History of Austria | 0 | - | 4.70 | 17,905 |
| Geography of the French Empire | 0 | - | 4.45 | 27,155 |
| The French Revolution | 0 | - | 4.47 | 24,064 |
| France Multiple Choice | 0 | - | 4.39 | 40,774 |
| History of France | 0 | - | 4.59 | 57,275 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,020 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,279 |
| The Vikings! | 0 | - | 4.46 | 28,368 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,213 |
| The Portuguese Empire | 0 | - | 4.58 | 12,082 |
| American to British Word Translation | 0 | - | 4.14 | 139,314 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,945 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,157 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,720 |
| Champions League Top 4 | 0 | - | 4.77 | 137,293 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,743 |
| Asia Map Quiz | 0 | - | 4.99 | 919,718 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,633,015 |
| Countries of Africa | 0 | - | 5.00 | 2,545,064 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,107 |
| African East Coast | 0 | - | 4.96 | 96,285 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,153 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,076 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,930 |
| Australia Map Quiz | 0 | - | 4.95 | 345,163 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,791 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,392 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,603 |
| Word Chain - South America | 0 | - | 4.51 | 23,930 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,613 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,049 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,810 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,743 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,577 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,046 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,246 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,602 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,450 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,142 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,883 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,518 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,005 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,141 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,438 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,685 |
| European Geography A-Z | 0 | - | 4.29 | 49,364 |
| Country Codes of Europe | 0 | - | 3.43 | 13,750 |
