| Federal Subjects of Russia | 0 | - | 4.94 | 143,935 |
| Countries that Beat Russia | 0 | - | 4.84 | 81,875 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,277 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 209,383 |
| Countries That Border Russia | 0 | - | 4.98 | 458,852 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,466 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,161 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,129 |
| Russia Country Quiz | 0 | - | 4.85 | 113,619 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,571 |
| Official European Union Languages | 0 | - | 4.97 | 236,489 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,685 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,127 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,366 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,508 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,529 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,560 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,319,577 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,836 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,782 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,830 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,042 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,787 |
| Countries With One Word And Two O's | 0 | - | 4.94 | 55,091 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,237 |
| Celtic Nations | 0 | - | 4.69 | 46,809 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,984 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,610 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,941 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,978 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,791 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,556 |
| German Groups of Things | 0 | - | 4.46 | 38,304 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,933 |
| Champions League Winners | 0 | - | 4.92 | 996,130 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 48,994 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,321 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,316 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,198 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,220 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,758 |
| States of Germany | 0 | - | 4.96 | 150,003 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,998 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,517 |
| Regions of Italy | 0 | - | 4.92 | 74,681 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,790 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,303 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,136 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,403 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,336 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,079 |
| Name a Valid African Country | 0 | - | 4.98 | 152,919 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,124 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,391 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,133 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 256,687 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,218 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,838 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,028 |
| Departments of France | 0 | - | 4.93 | 52,787 |
| Word Chain - France | 0 | - | 4.38 | 42,577 |
| Italian Foods | 0 | - | 4.31 | 72,165 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,358 |
| British Groups of Things | 0 | - | 4.25 | 82,668 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,944 |
| England or Wales? | 0 | - | 4.94 | 45,306 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,452 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,693 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,544 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,033 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,538 |
| Countries that Beat Canada | 0 | - | 4.90 | 86,842 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,445 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,598 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,975 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,005 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,780 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 88,946 |
| Slavic Languages | 0 | - | 4.67 | 53,969 |
| Countries that Border Poland | 0 | - | 4.99 | 171,324 |
| Russian History A-Z | 0 | - | 4.38 | 30,762 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,457 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 98,395 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,683 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,607 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,537 |
| Countries Bordering Serbia | 0 | - | 4.96 | 91,725 |
| The Trojan War | 0 | - | 4.83 | 39,424 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,759 |
| Name that Greek Letter | 0 | - | 4.94 | 321,620 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,508 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,427 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,037 |
| Roman Emperors | 0 | - | 4.95 | 118,436 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,242 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,470 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,440 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,911 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 55,173 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,109 |
| Famous Russians | 0 | - | 4.16 | 23,727 |
| History of Russia Quiz | 0 | - | 4.49 | 31,788 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,563 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,892 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,093 |
| Word Chain - Germany | 0 | - | 4.31 | 22,474 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,909 |
| History of Italy | 0 | - | 4.55 | 31,813 |
| Word Chain - Italy | 0 | - | 4.07 | 23,087 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,153 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,477 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,285 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,979 |
| Geography of Spain | 0 | - | 4.59 | 21,960 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,237 |
| Members of the British Royal Family | 0 | - | 4.10 | 113,794 |
| Name a Valid English City | 0 | - | 4.19 | 16,628 |
| Dog in the Answers | 0 | - | 4.16 | 68,354 |
| Countries With One Word and Two U's | 0 | - | 4.47 | 50,403 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,801 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,490 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 26,856 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,377 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 110,881 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,818 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,685 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,202 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,864 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,654 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,614 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,011 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,290 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,491 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,581 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,139 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,604 |
| Capitals of French Regions | 0 | - | 4.45 | 15,983 |
| Regions of France | 0 | - | 4.78 | 119,199 |
| France Immigration by Country | 0 | - | 4.72 | 75,953 |
| Famous Germans | 0 | - | 4.50 | 54,603 |
| Capitals of German States | 0 | - | 4.74 | 28,810 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,090 |
| Germany True or False? | 0 | - | 4.61 | 48,529 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,460 |
| Ancient Greek Words | 0 | - | 4.92 | 110,676 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,385 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,612 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,768 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,042 |
| British to American Food Translation | 0 | - | 3.38 | 51,813 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,391 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,034 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,302 |
| Asia Geography Quiz #1 | 0 | - | 4.78 | 53,323 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,318 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,145 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,081 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,020 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,163 |
| Australian Capitals | 0 | - | 4.92 | 62,592 |
| Word Chain - Australia | 0 | - | 4.37 | 38,013 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,258 |
| European Physical Geography | 0 | - | 4.26 | 33,373 |
| Albania Country Quiz | 0 | - | 4.54 | 38,637 |
| Geography of Russia | 0 | - | 4.57 | 21,424 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,849 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,772 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,302 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,020 |
| Romania Country Quiz | 0 | - | 4.63 | 53,334 |
| Serbia Country Quiz | 0 | - | 4.44 | 34,760 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Geography of the French Empire | 0 | - | 4.48 | 26,924 |
| The French Revolution | 0 | - | 4.46 | 23,779 |
| France Multiple Choice | 0 | - | 4.38 | 40,633 |
| History of France | 0 | - | 4.59 | 56,008 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,903 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,453 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,686 |
| The Portuguese Empire | 0 | - | 4.54 | 11,989 |
| American to British Word Translation | 0 | - | 4.06 | 117,047 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,701 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,209 |
| Champions League Top 4 | 0 | - | 4.77 | 133,745 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,686 |
| Asia Map Quiz | 0 | - | 4.99 | 906,828 |
| Countries that Beat India | 0 | - | 4.41 | 62,580 |
| Countries of Africa | 0 | - | 5.00 | 2,507,114 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,797 |
| African East Coast | 0 | - | 4.96 | 95,021 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,904 |
| Countries that Beat South Africa | 0 | - | 4.69 | 42,057 |
| Oceania Geography Quiz | 0 | - | 4.55 | 21,977 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,780 |
| Australia Map Quiz | 0 | - | 4.94 | 342,435 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,611 |
| South American Geography Quiz #2 | 0 | - | 4.62 | 39,188 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,468 |
