| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,545 |
| Official European Union Languages | 0 | - | 4.97 | 236,413 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,633 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,139 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,747 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,967 |
| Slavic Languages | 0 | - | 4.67 | 53,948 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,500 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,544 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,051 |
| History of Russia Quiz | 0 | - | 4.49 | 31,781 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,315 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,355 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 54,565 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,228 |
| Celtic Nations | 0 | - | 4.69 | 46,802 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,808 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,654 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,677 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,188 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,093 |
| Slavic Countries | 0 | - | 4.96 | 110,798 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,029 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,446 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 70,625 |
| Countries where Arabic is an Official Language | 0 | - | 4.85 | 72,227 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,285 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,149 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,161 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,692 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,130 |
| States of Germany | 0 | - | 4.96 | 149,884 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,963 |
| Regions of Italy | 0 | - | 4.92 | 74,623 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,765 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,195 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,079 |
| Champions League Winners | 0 | - | 4.92 | 995,543 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,112 |
| Geography of Russia | 0 | - | 4.57 | 21,419 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,497 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,691 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,397 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,331 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,045 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,998 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,809 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,010 |
| Departments of France | 0 | - | 4.93 | 52,718 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,349 |
| England or Wales? | 0 | - | 4.94 | 45,289 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,361 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,431 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,940 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,892 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,764 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,348 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,641 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,589 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,522 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,499 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,452 |
| Name that Greek Letter | 0 | - | 4.94 | 321,492 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,420 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,234 |
| Languages of Spain | 0 | - | 4.36 | 23,139 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,398 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,456 |
| Famous Russians | 0 | - | 4.16 | 23,714 |
| Word Chain - Russia | 0 | - | 4.33 | 15,684 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,553 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,859 |
| The Trojan War | 0 | - | 4.83 | 39,403 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,429 |
| History of Italy | 0 | - | 4.55 | 31,805 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,114 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,006 |
| Roman Emperors | 0 | - | 4.95 | 118,356 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,470 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,966 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,001 |
| Top 12 Languages Spoken in Asia | 0 | - | 4.39 | 32,416 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,337 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,841 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,776 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,648 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,171 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,808 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,632 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,594 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,997 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,262 |
| Europe Map Quiz | 0 | - | 5.00 | 4,728,814 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,971 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,596 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,922 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,962 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,564 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,781 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,524 |
| Capitals of French Regions | 0 | - | 4.45 | 15,980 |
| Regions of France | 0 | - | 4.78 | 119,104 |
| France Immigration by Country | 0 | - | 4.72 | 75,933 |
| Famous Germans | 0 | - | 4.50 | 54,580 |
| German Groups of Things | 0 | - | 4.46 | 38,294 |
| Capitals of German States | 0 | - | 4.74 | 28,799 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,084 |
| Germany True or False? | 0 | - | 4.61 | 48,513 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,423 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,330 |
| Ancient Greek Words | 0 | - | 4.92 | 110,607 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,281 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,744 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,032 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,894 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,920 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,242 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,937 |
| Top World Languages | 0 | - | 4.92 | 812,401 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,301 |
| Official Languages of South Africa | 0 | - | 4.56 | 26,041 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,783 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| European Physical Geography | 0 | - | 4.26 | 33,368 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,828 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,759 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,281 |
| Hungary Country Quiz | 0 | - | 4.49 | 42,996 |
| Romania Country Quiz | 0 | - | 4.63 | 53,316 |
| History of Austria | 0 | - | 4.70 | 17,742 |
| Geography of the French Empire | 0 | - | 4.48 | 26,920 |
| The French Revolution | 0 | - | 4.46 | 23,759 |
| France Multiple Choice | 0 | - | 4.38 | 40,625 |
| History of France | 0 | - | 4.59 | 55,940 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,376 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,265 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,577 |
| The Vikings! | 0 | - | 4.45 | 28,237 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,667 |
| The Portuguese Empire | 0 | - | 4.54 | 11,984 |
| American to British Word Translation | 0 | - | 4.06 | 117,024 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,182 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,384 |
| Champions League Top 4 | 0 | - | 4.77 | 133,618 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,438,570 |
| Asia Map Quiz | 0 | - | 4.99 | 906,306 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,520 |
| Countries by Official Language | 0 | - | 4.95 | 192,655 |
| Places in their Native Language #1 | 0 | - | 4.84 | 239,321 |
| Places in their Native Language #2 | 0 | - | 4.85 | 122,923 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 292,966 |
| Countries in their Native Language | 0 | - | 4.99 | 196,525 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,698 |
| Countries of Africa | 0 | - | 5.00 | 2,505,719 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,757 |
| African East Coast | 0 | - | 4.96 | 94,971 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,846 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,742 |
| Australia Map Quiz | 0 | - | 4.94 | 342,330 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,359 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 209,949 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,165 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,823 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,153 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,162 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,405 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,847 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,227 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,441 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,117 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,894 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,274 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,382 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,484 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,413 |
| European Geography A-Z | 0 | - | 4.28 | 48,973 |
| Country Codes of Europe | 0 | - | 3.46 | 13,649 |
| The Only European Country ... | 0 | - | 4.91 | 213,609 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,396 |
| Embarrassing Chapters in Russian History | 0 | - | 3.73 | 20,228 |
| Latvia Country Quiz | 0 | - | 4.75 | 31,752 |
| Austria... or Australia? | 0 | - | 4.68 | 103,833 |
| Presidents of France | 0 | - | 4.25 | 23,875 |
| Word Chain - France | 0 | - | 4.38 | 42,570 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,751 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,761 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,770 |
| Italian Foods | 0 | - | 4.30 | 72,136 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,921 |
| The Mafia Quiz | 0 | - | 4.46 | 23,196 |
| History of The Netherlands | 0 | - | 4.46 | 17,303 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,954 |
| Canary Islands | 0 | - | 4.61 | 17,390 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,049 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,108 |
| British Spellings | 0 | - | 4.07 | 99,195 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
| British Acronyms | 0 | - | 4.39 | 45,608 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,942 |
