| Federal Subjects of Russia | 0 | - | 4.95 | 110,085 |
| Europe Geography Decoder | 0 | - | 4.89 | 62,751 |
| Add A Letter - Make a European City | 0 | - | 4.87 | 20,704 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 453,822 |
| Africa Geography Quiz #1 | 0 | - | 4.91 | 45,892 |
| Category Elimination - European Geography #3 | 0 | - | 4.84 | 64,473 |
| Europe Geography Quiz #1 | 0 | - | 4.52 | 66,715 |
| Europe Geography Quiz #2 | 0 | - | 4.56 | 67,198 |
| Europe Geography Quiz #4 | 0 | - | 4.56 | 65,898 |
| Europe Geography Quiz #5 | 0 | - | 4.53 | 57,598 |
| Countries That Border Russia | 0 | - | 4.98 | 423,224 |
| Category Elimination - European Geography #1 | 0 | - | 4.97 | 198,141 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 243,597 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 141,012 |
| Russia Country Quiz | 0 | - | 4.84 | 102,304 |
| Official European Union Languages | 0 | - | 4.98 | 198,702 |
| European Countries in their Native Language | 0 | - | 4.99 | 142,846 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 381,838 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.94 | 75,454 |
| Word Scramble - European Countries | 0 | - | 4.71 | 112,835 |
| Countries that Beat Switzerland | 0 | - | 4.85 | 37,249 |
| Europe Geography Quiz #3 | 0 | - | 4.31 | 59,649 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.82 | 38,904 |
| Word Chain - Russia | 0 | - | 4.41 | 14,749 |
| French Geography Quiz #1 | 0 | - | 4.86 | 30,757 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.89 | 79,006 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 283,068 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 113,379 |
| Champions League Winners | 0 | - | 4.90 | 838,014 |
| Asia Geography Quiz #1 | 0 | - | 4.79 | 50,685 |
| Asia Geography Quiz #2 | 0 | - | 4.59 | 45,062 |
| Celtic Nations | 0 | - | 4.76 | 44,508 |
| Most Mentioned Allies of Russia | 0 | - | 4.47 | 33,940 |
| Most Mentioned Enemies of Russia | 0 | - | 4.70 | 81,892 |
| German Groups of Things | 0 | - | 4.43 | 35,752 |
| Regions of Spain Quiz | 0 | - | 4.85 | 93,460 |
| Cantons of Switzerland | 0 | - | 4.96 | 39,733 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 263,488 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 99,974 |
| Catholic Countries in Europe | 0 | - | 4.87 | 82,702 |
| Famous Russians Quiz | 0 | - | 4.15 | 22,555 |
| History of Russia Quiz | 0 | - | 4.48 | 29,734 |
| Geography of Russia | 0 | - | 4.54 | 20,080 |
| States of Germany | 0 | - | 4.94 | 121,554 |
| Germany Immigration by Country | 0 | - | 4.90 | 68,871 |
| States of the German Confederation in 1848 | 0 | - | 4.84 | 26,058 |
| Counties of Ireland | 0 | - | 4.89 | 157,233 |
| Regions of Italy | 0 | - | 4.88 | 59,520 |
| Countries Surrounding Rome | 0 | - | 4.96 | 46,376 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 31,309 |
| Switzerland Immigration by Country | 0 | - | 4.81 | 19,752 |
| British Groups of Things | 0 | - | 4.26 | 79,932 |
| United Kingdom Decoder | 0 | - | 4.27 | 38,641 |
| England or Wales? | 0 | - | 4.93 | 39,825 |
| All Champions League Teams Ever | 0 | - | 4.89 | 102,380 |
| Asia Geography Quiz #3 | 0 | - | 4.50 | 30,570 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.90 | 91,541 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 81,163 |
| Africa Geography Quiz #2 | 0 | - | 4.57 | 30,990 |
| Category Elimination - African Geography #1 | 0 | - | 4.89 | 78,704 |
| Oceania Geography Quiz | 0 | - | 4.53 | 20,767 |
| South American Geography Quiz #2 | 0 | - | 4.70 | 36,818 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 145,081 |
| Count to 10 in Europe: Pro | 0 | - | 4.79 | 60,576 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.71 | 53,438 |
| Word Chain - France | 0 | - | 4.38 | 39,756 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 71,260 |
| Roman Emperors | 0 | - | 4.95 | 94,705 |
| Spanish Immigration by Country | 0 | - | 4.58 | 51,509 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 80,541 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.42 | 245,288 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 287,031 |
| Pre-Euro Currencies | 0 | - | 4.42 | 49,150 |
| Top 20 Football Clubs in Europe | 0 | - | 4.49 | 83,345 |
| Name a Major European City A-Z | 0 | - | 4.33 | 42,466 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.93 | 55,525 |
| Slavic Languages | 0 | - | 4.58 | 48,399 |
| Countries that Border Poland | 0 | - | 4.99 | 157,625 |
| Countries that Border Hungary | 0 | - | 4.98 | 95,758 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.82 | 30,647 |
| Moldova Country Quiz | 0 | - | 4.87 | 27,067 |
| Countries Bordering Serbia | 0 | - | 4.95 | 82,344 |
| The Trojan War | 0 | - | 4.81 | 35,628 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 579,499 |
| Geography of the Dutch Empire | 0 | - | 4.70 | 31,997 |
| Most Common Last Names in Sweden | 0 | - | 4.41 | 14,000 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 64,930 |
| Geography of Spain | 0 | - | 4.51 | 20,211 |
| Word Chain - United Kingdom | 0 | - | 4.04 | 27,854 |
| Name a Valid English City | 0 | - | 4.16 | 15,239 |
| South American Geography Quiz #1 | 0 | - | 4.71 | 30,510 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 455,723 |
| Top European Languages on a Map | 0 | - | 4.76 | 116,687 |
| Russia Multiple Choice | 0 | - | 4.56 | 37,822 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.87 | 88,544 |
| Latvia Country Quiz | 0 | - | 4.88 | 28,172 |
| Word Chain - Germany | 0 | - | 4.29 | 20,989 |
| Germany Multiple Choice | 0 | - | 4.80 | 48,835 |
| Olympian Gods Quiz | 0 | - | 4.96 | 454,970 |
| Name that Greek Letter | 0 | - | 4.94 | 294,066 |
| Word Chain - Italy | 0 | - | 4.08 | 21,908 |
| Italy Multiple Choice | 0 | - | 4.72 | 92,733 |
| Two Letter Roman Numerals | 0 | - | 4.98 | 48,004 |
| Provinces of the Netherlands | 0 | - | 4.61 | 32,950 |
| 100 Greatest Britons Quiz | 0 | - | 4.44 | 45,881 |
| British Acronyms | 0 | - | 4.42 | 43,180 |
| Fictional Characters from Great Britain | 0 | - | 4.10 | 31,158 |
| Foods in a Full English Breakfast | 0 | - | 4.41 | 72,706 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.87 | 26,315 |
| Beatles Songs Quiz | 0 | - | 4.94 | 204,142 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 271,663 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 252,857 |
| Famous People from Africa | 0 | - | 4.42 | 10,214 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 242,952 |
| Word Chain - Africa | 0 | - | 4.43 | 29,512 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.96 | 22,468 |
| Name a Valid Answer - United States #1 | 0 | - | 4.70 | 84,648 |
| European Geography By Letter - A | 0 | - | 4.55 | 123,579 |
| European Geography By Letter - B #1 | 0 | - | 4.72 | 102,977 |
| European Geography By Letter - C | 0 | - | 4.44 | 104,378 |
| European Geography By Letter - D | 0 | - | 4.52 | 98,976 |
| European Geography By Letter - L | 0 | - | 4.50 | 104,410 |
| European Geography By Letter - M | 0 | - | 4.55 | 113,898 |
| European Geography By Letter - P | 0 | - | 4.79 | 89,065 |
| European Geography By Letter - N | 0 | - | 4.43 | 93,054 |
| European Geography By Letter - V | 0 | - | 4.45 | 85,895 |
| Europe Map Quiz | 0 | - | 5.00 | 4,253,403 |
| European Geography By Letter - S #1 | 0 | - | 4.57 | 93,507 |
| European Geography A-Z | 0 | - | 4.43 | 45,042 |
| European Geography By Letter - B #2 | 0 | - | 4.72 | 61,490 |
| Regions of France | 0 | - | 4.64 | 98,960 |
| France Immigration by Country | 0 | - | 4.80 | 68,276 |
| Capitals of German States | 0 | - | 4.67 | 26,977 |
| Chancellors of Germany, 1949–present | 0 | - | 4.56 | 13,309 |
| Germany True or False? | 0 | - | 4.64 | 44,087 |
| Largest Islands of Greece | 0 | - | 4.56 | 38,906 |
| Ancient Greek Words | 0 | - | 4.90 | 96,200 |
| Capitals of Italian Regions | 0 | - | 4.52 | 25,989 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 396,206 |
| The Vikings! | 0 | - | 4.44 | 27,013 |
| Sweden Immigration by Country | 0 | - | 4.66 | 41,902 |
| The Portuguese Empire | 0 | - | 4.54 | 11,287 |
| British Words Quiz #2 | 0 | - | 4.03 | 106,583 |
| Languages of the United Kingdom | 0 | - | 4.10 | 38,174 |
| United Kingdom A-Z | 0 | - | 4.53 | 80,180 |
| Champions League Top 4 | 0 | - | 4.76 | 102,018 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,334,095 |
| Asia Map Quiz | 0 | - | 4.99 | 773,488 |
| Africa Map Quiz | 0 | - | 5.00 | 1,924,629 |
| Oceania Map Quiz | 0 | - | 4.97 | 562,245 |
| Australian Capitals | 0 | - | 4.90 | 52,942 |
| Word Chain - Australia | 0 | - | 4.38 | 36,030 |
| European Physical Geography | 0 | - | 4.19 | 31,806 |
| Word Scramble - European Cities | 0 | - | 3.68 | 17,409 |
| Albania Country Quiz | 0 | - | 4.51 | 33,901 |
| Russian History A-Z | 0 | - | 4.34 | 17,232 |
| Croatia Country Quiz | 0 | - | 4.80 | 36,807 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 37,507 |
| Slovakia... or Slovenia? | 0 | - | 4.79 | 39,481 |
| Hungary Country Quiz | 0 | - | 4.47 | 37,604 |
| Romania Country Quiz | 0 | - | 4.65 | 47,216 |
| History of Austria | 0 | - | 4.68 | 16,275 |
| Geography of the French Empire | 0 | - | 4.49 | 25,043 |
| The French Revolution | 0 | - | 4.44 | 21,800 |
| History of France Quiz | 0 | - | 4.55 | 39,475 |
| Figures from Greek Mythology | 0 | - | 4.92 | 168,374 |
| History of Ireland Quiz | 0 | - | 4.43 | 18,775 |
| History of Italy | 0 | - | 4.49 | 29,645 |
| Random Cities by Clue | 0 | - | 4.56 | 31,733 |
| Ancient Roman Trivia #2 | 0 | - | 4.55 | 35,192 |
| Geography of the Roman Empire | 0 | - | 4.58 | 48,053 |
| Roman Names for Places | 0 | - | 4.66 | 41,052 |
| Byzantine History | 0 | - | 4.87 | 26,071 |
| History of The Netherlands | 0 | - | 4.42 | 15,632 |
| Kings of Spain Quiz | 0 | - | 4.12 | 12,737 |
| Most Common First Names in Spain | 0 | - | 4.25 | 43,475 |
| Canary Islands | 0 | - | 4.60 | 16,491 |
| Real Madrid 2010's Starting XI | 0 | - | 4.85 | 49,298 |
| British Spellings Quiz | 0 | - | 4.04 | 94,395 |
| Most Common Surnames in the UK | 0 | - | 4.18 | 65,468 |
| Robin Hood Quiz | 0 | - | 4.00 | 8,031 |
| British Monopoly Board | 0 | - | 4.50 | 38,686 |
| Wonderwall Lyrics | 0 | - | 4.22 | 68,316 |
| Best-Selling British Musical Acts | 0 | - | 4.47 | 43,276 |
| Champions League All-Time Table | 0 | - | 4.17 | 114,158 |
| Champions League Top Goal Scorers | 0 | - | 4.22 | 163,715 |
| Word Chain - Asia | 0 | - | 4.31 | 27,615 |
| South and Central Asia Map Quiz | 0 | - | 4.92 | 78,602 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,273,067 |
| Countries of Africa | 0 | - | 5.00 | 2,139,971 |
| African East Coast | 0 | - | 4.97 | 83,255 |
| Western Africa Map Quiz | 0 | - | 4.97 | 59,922 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 39,639 |
| Australia Map Quiz | 0 | - | 4.94 | 317,231 |
| Hispanic Last Names in the U.S. | 0 | - | 4.29 | 52,439 |
| Word Chain - South America | 0 | - | 4.48 | 21,802 |
| United States Map Quiz | 0 | - | 4.98 | 3,880,327 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.18 | 696,719 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 193,837 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.92 | 86,398 |
