| Federal Subjects of Russia | 0 | - | 4.95 | 147,072 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,976 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 529,429 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,383 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 80,952 |
| Countries That Border Russia | 0 | - | 4.98 | 461,660 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,179 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 276,768 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,082 |
| Russia Country Quiz | 0 | - | 4.85 | 114,451 |
| German Groups of Things | 0 | - | 4.46 | 38,473 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,109 |
| Official European Union Languages | 0 | - | 4.97 | 238,466 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,819 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,124 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,680 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,835 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,829 |
| British Groups of Things | 0 | - | 4.25 | 82,862 |
| History of Russia Quiz | 0 | - | 4.47 | 31,913 |
| Celtic Nations | 0 | - | 4.69 | 46,938 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,267 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,931 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,215 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,228 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,349 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,428 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 171,660 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,422 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,006 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,993 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,345 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,995 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 355,801 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,331 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,093 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,107 |
| European Geography By Letter - B #2 | 0 | - | 4.85 | 78,457 |
| Famous Russians | 0 | - | 4.16 | 23,839 |
| Word Chain - Russia | 0 | - | 4.33 | 15,749 |
| States of Germany | 0 | - | 4.96 | 152,483 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,012 |
| Regions of Italy | 0 | - | 4.92 | 75,839 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,130 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,911 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,182 |
| Champions League Winners | 0 | - | 4.92 | 1,006,397 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 322,160 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,484 |
| Geography of Russia | 0 | - | 4.57 | 21,525 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,693 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,316 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,452 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,663 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 28,134 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,327 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,336 |
| Departments of France | 0 | - | 4.93 | 54,075 |
| Word Chain - France | 0 | - | 4.38 | 42,773 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,543 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,034 |
| England or Wales? | 0 | - | 4.94 | 45,679 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,302 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 109,986 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,776 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,597 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,654 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 114,913 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,500 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,431 |
| Slavic Languages | 0 | - | 4.68 | 54,352 |
| Countries that Border Poland | 0 | - | 4.99 | 172,250 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,209 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,866 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,797 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,378 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,763 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 647,235 |
| Name that Greek Letter | 0 | - | 4.93 | 323,393 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,606 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,458 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,020 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,843 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 275,190 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,157 |
| California Groups of Things | 0 | - | 4.25 | 45,484 |
| New York Groups of Things | 0 | - | 4.35 | 63,647 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,453 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,050 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,722 |
| Russian History A-Z | 0 | - | 4.38 | 31,698 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,761 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,381 |
| Word Chain - Germany | 0 | - | 4.31 | 22,585 |
| The Trojan War | 0 | - | 4.83 | 39,718 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,805 |
| History of Italy | 0 | - | 4.55 | 31,969 |
| Word Chain - Italy | 0 | - | 4.07 | 23,164 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,770 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,516 |
| Roman Emperors | 0 | - | 4.95 | 119,995 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,653 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,397 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,226 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,340 |
| Name a Valid English City | 0 | - | 4.19 | 16,724 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,094 |
| Famous People from Africa | 0 | - | 4.45 | 10,949 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,963 |
| Word Chain - Africa | 0 | - | 4.47 | 31,614 |
| Four Letter African Geography | 0 | - | 4.67 | 19,287 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,163 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,970 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,133 |
| European Geography By Letter - B #1 | 0 | - | 4.64 | 118,146 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,860 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,528 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,447 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,571 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,499 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,804 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,664 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,981 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,397 |
| Europe Map Quiz | 0 | - | 5.00 | 4,762,050 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,569 |
| Capitals of French Regions | 0 | - | 4.45 | 16,066 |
| Regions of France | 0 | - | 4.72 | 120,740 |
| France Immigration by Country | 0 | - | 4.70 | 76,500 |
| Famous Germans | 0 | - | 4.50 | 55,279 |
| Capitals of German States | 0 | - | 4.74 | 28,952 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,330 |
| Germany True or False? | 0 | - | 4.61 | 48,792 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,996 |
| Olympian Gods Quiz | 0 | - | 4.96 | 500,686 |
| Ancient Greek Words | 0 | - | 4.93 | 111,563 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,472 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,340 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,260 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,224 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,168 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,676 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,507 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,556 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,246 |
| Groups of Things - The Bible | 0 | - | 4.44 | 55,290 |
| Africa Map Quiz | 0 | - | 5.00 | 2,117,517 |
| Oceania Map Quiz | 0 | - | 4.98 | 642,089 |
| Australian Capitals | 0 | - | 4.92 | 62,718 |
| Word Chain - Australia | 0 | - | 4.38 | 38,140 |
| European Physical Geography | 0 | - | 4.26 | 33,504 |
| Word Scramble - European Cities | 0 | - | 3.84 | 18,913 |
| Albania Country Quiz | 0 | - | 4.54 | 38,986 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,211 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,953 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,698 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,428 |
| Romania Country Quiz | 0 | - | 4.63 | 53,765 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,028 |
| History of Austria | 0 | - | 4.70 | 17,860 |
| Geography of the French Empire | 0 | - | 4.45 | 27,057 |
| The French Revolution | 0 | - | 4.46 | 23,929 |
| France Multiple Choice | 0 | - | 4.39 | 40,738 |
| History of France | 0 | - | 4.59 | 56,960 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 436,994 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,122 |
| The Vikings! | 0 | - | 4.46 | 28,341 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,118 |
| The Portuguese Empire | 0 | - | 4.58 | 12,064 |
| American to British Word Translation | 0 | - | 4.14 | 139,023 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,888 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,024 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,655 |
| Champions League Top 4 | 0 | - | 4.77 | 136,368 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,448,124 |
| Asia Map Quiz | 0 | - | 4.99 | 916,483 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,621,601 |
| Famous Duos #2 | 0 | - | 4.21 | 117,041 |
| Famous Duos Quiz #1 | 0 | - | 4.15 | 84,055 |
| Countries of Africa | 0 | - | 5.00 | 2,536,057 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,802 |
| African East Coast | 0 | - | 4.96 | 96,030 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,855 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,052 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,667 |
| Australia Map Quiz | 0 | - | 4.95 | 344,563 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,746 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,342 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,575 |
| Word Chain - South America | 0 | - | 4.51 | 23,902 |
| United States Map Quiz | 0 | - | 4.98 | 4,157,891 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 747,013 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,195 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,646 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,971 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,391 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,559 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,870 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,999 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,676 |
