| Countries With the Most Russian Speakers | 0 | - | 4.95 | 72,815 |
| European Countries by First 2 Letters | 0 | - | 4.96 | 516,221 |
| Federal Subjects of Russia | 0 | - | 4.95 | 135,864 |
| Save Europeans by Guessing Countries | 0 | - | 4.87 | 199,611 |
| Countries That Border Russia | 0 | - | 4.98 | 450,825 |
| Russia Country Quiz | 0 | - | 4.84 | 111,070 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 66,568 |
| Official European Union Languages | 0 | - | 4.98 | 231,525 |
| European Countries in their Native Language | 0 | - | 4.99 | 153,494 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 415,808 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 161,620 |
| Countries that Beat Russia | 0 | - | 4.83 | 79,303 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 623,849 |
| Europe Geography Decoder | 0 | - | 4.86 | 68,055 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.84 | 41,349 |
| Top European Languages on a Map | 0 | - | 4.77 | 127,949 |
| Name that Greek Letter | 0 | - | 4.93 | 314,800 |
| Countries that Beat Switzerland | 0 | - | 4.87 | 40,756 |
| Top African Languages on a Map | 0 | - | 4.92 | 67,918 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.95 | 208,626 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.85 | 85,194 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 302,366 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 154,467 |
| Germany Multiple Choice | 0 | - | 4.83 | 52,884 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 334,561 |
| Top Asian Languages on a Map | 0 | - | 4.94 | 68,118 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 22,705 |
| Celtic Nations | 0 | - | 4.77 | 46,315 |
| Champions League Winners | 0 | - | 4.91 | 968,561 |
| Catholic Countries in Europe | 0 | - | 4.83 | 91,620 |
| European Geography By Letter - B #2 | 0 | - | 4.81 | 67,081 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 76,241 |
| States of Germany | 0 | - | 4.95 | 142,750 |
| Germany Immigration by Country | 0 | - | 4.86 | 77,432 |
| States of the German Confederation in 1848 | 0 | - | 4.88 | 30,158 |
| Counties of Ireland | 0 | - | 4.91 | 180,709 |
| Regions of Italy | 0 | - | 4.91 | 70,591 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 36,077 |
| Regions of Spain Quiz | 0 | - | 4.89 | 107,652 |
| Cantons of Switzerland | 0 | - | 4.97 | 47,136 |
| American to British Word Translation | 0 | - | 4.01 | 115,522 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,163 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 16,936 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.83 | 63,198 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.70 | 57,073 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 223,212 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 267,608 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 159,331 |
| Departments of France | 0 | - | 4.91 | 47,817 |
| Countries Surrounding Rome | 0 | - | 4.96 | 48,705 |
| British Spellings Quiz | 0 | - | 4.07 | 98,144 |
| England or Wales? | 0 | - | 4.94 | 44,192 |
| All UEFA Champions League Teams Ever | 0 | - | 4.83 | 124,012 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 77,205 |
| English Words of Arabic Origin | 0 | - | 4.53 | 49,003 |
| Pre-Euro Currencies | 0 | - | 4.43 | 51,803 |
| Word Scramble - European Countries | 0 | - | 4.73 | 137,457 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 107,667 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 62,758 |
| Slavic Languages | 0 | - | 4.64 | 52,651 |
| Countries that Border Poland | 0 | - | 4.99 | 168,109 |
| Russian History A-Z | 0 | - | 4.37 | 18,614 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 80,826 |
| Countries Bordering Serbia | 0 | - | 4.96 | 89,615 |
| French Geography Quiz #1 | 0 | - | 4.88 | 33,677 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 44,938 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 32,751 |
| The Trojan War | 0 | - | 4.81 | 38,419 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.83 | 105,401 |
| Capitals of Italian Regions | 0 | - | 4.62 | 35,937 |
| Ancient Roman Trivia #1 | 0 | - | 4.84 | 82,304 |
| Roman Emperors | 0 | - | 4.96 | 112,000 |
| Spanish Immigration by Country | 0 | - | 4.63 | 54,566 |
| Languages of Spain | 0 | - | 4.36 | 22,730 |
| British to American Word Translation | 0 | - | 3.75 | 252,273 |
| British Foods | 0 | - | 3.88 | 47,983 |
| British and American Word Differences | 0 | - | 2.68 | 45,690 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,014 |
| Olympian Gods Quiz | 0 | - | 4.96 | 475,916 |
| Italy Multiple Choice | 0 | - | 4.74 | 101,114 |
| Geography of the Dutch Empire | 0 | - | 4.68 | 33,927 |
| Countries of the Spanish Empire | 0 | - | 4.51 | 76,505 |
| African Countries by First 2 Letters | 0 | - | 4.95 | 261,823 |
| European Geography By Letter - A | 0 | - | 4.61 | 130,230 |
| European Geography By Letter - B #1 | 0 | - | 4.70 | 108,734 |
| European Geography By Letter - C | 0 | - | 4.46 | 109,858 |
| European Geography By Letter - D | 0 | - | 4.52 | 104,560 |
| European Geography By Letter - L | 0 | - | 4.52 | 109,955 |
| European Geography By Letter - M | 0 | - | 4.53 | 119,371 |
| European Geography By Letter - P | 0 | - | 4.78 | 94,367 |
| European Geography By Letter - N | 0 | - | 4.43 | 97,802 |
| European Geography By Letter - R | 0 | - | 4.41 | 90,993 |
| European Geography By Letter - V | 0 | - | 4.44 | 90,542 |
| Europe Map Quiz | 0 | - | 5.00 | 4,629,671 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,107 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 70,656 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,130 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,246 |
| European Geography By Letter - S #1 | 0 | - | 4.61 | 97,826 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.70 | 64,400 |
| Four Letter European Geography #1 | 0 | - | 4.45 | 25,601 |
| Four Letter European Geography #2 | 0 | - | 4.55 | 18,380 |
| Most Mentioned Allies of Russia | 0 | - | 4.48 | 37,062 |
| Most Mentioned Enemies of Russia | 0 | - | 4.70 | 88,072 |
| Capitals of French Regions | 0 | - | 4.43 | 15,705 |
| Regions of France | 0 | - | 4.74 | 114,385 |
| France Immigration by Country | 0 | - | 4.73 | 74,418 |
| German Loan Words | 0 | - | 4.27 | 134,098 |
| Famous Germans | 0 | - | 4.44 | 41,383 |
| German Groups of Things | 0 | - | 4.46 | 37,798 |
| Capitals of German States | 0 | - | 4.70 | 28,406 |
| Chancellors of Germany, 1949–present | 0 | - | 4.58 | 22,444 |
| Germany True or False? | 0 | - | 4.63 | 47,672 |
| Largest Islands of Greece | 0 | - | 4.59 | 45,669 |
| Ancient Greek Words | 0 | - | 4.92 | 107,342 |
| Famous Italians by Clue | 0 | - | 4.45 | 85,242 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 53,831 |
| Provinces of the Netherlands | 0 | - | 4.77 | 38,615 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 47,561 |
| Foods in a Full English Breakfast | 0 | - | 4.45 | 99,816 |
| Things British People Know that Americans Don't | 0 | - | 4.23 | 50,729 |
| Beatles Songs Quiz | 0 | - | 4.96 | 227,065 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 286,150 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 271,641 |
| Africa Map Quiz | 0 | - | 5.00 | 2,064,987 |
| Oceania Map Quiz | 0 | - | 4.98 | 616,413 |
| Australian Capitals | 0 | - | 4.92 | 62,199 |
| European Physical Geography | 0 | - | 4.25 | 33,039 |
| Albania Country Quiz | 0 | - | 4.53 | 37,597 |
| History of Russia Quiz | 0 | - | 4.49 | 31,423 |
| Geography of Russia | 0 | - | 4.56 | 21,096 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,199 |
| Serbia Country Quiz | 0 | - | 4.43 | 33,973 |
| History of Austria | 0 | - | 4.69 | 17,395 |
| Geography of the French Empire | 0 | - | 4.51 | 26,468 |
| The French Revolution | 0 | - | 4.46 | 23,156 |
| France Multiple Choice | 0 | - | 4.37 | 40,218 |
| History of France Quiz | 0 | - | 4.56 | 42,200 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.42 | 23,051 |
| Figures from Greek Mythology | 0 | - | 4.90 | 178,217 |
| History of Italy | 0 | - | 4.54 | 31,392 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 423,073 |
| The Vikings! | 0 | - | 4.46 | 27,976 |
| Sweden Immigration by Country | 0 | - | 4.54 | 54,534 |
| The Portuguese Empire | 0 | - | 4.54 | 11,818 |
| United Kingdom A-Z | 0 | - | 4.53 | 85,965 |
| Champions League Top 4 | 0 | - | 4.74 | 126,833 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,416,863 |
| Asia Map Quiz | 0 | - | 4.99 | 875,728 |
| Elemental Words | 0 | - | 4.96 | 50,951 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 694,254 |
| Japanese Loanwords | 0 | - | 4.47 | 83,220 |
| Japanese Language - Katakana Practice | 0 | - | 4.59 | 31,263 |
| Countries of Africa | 0 | - | 5.00 | 2,417,603 |
| African East Coast | 0 | - | 4.96 | 92,307 |
| Western Africa Map Quiz | 0 | - | 4.97 | 70,118 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 47,407 |
| Australia Map Quiz | 0 | - | 4.94 | 337,056 |
| United States Map Quiz | 0 | - | 4.98 | 4,090,353 |
| Things Named For People #2 - U.S. Centric | 0 | - | 4.20 | 52,161 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 58,603 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 203,934 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 90,491 |
| Countries That Use the Euro | 0 | - | 4.97 | 92,665 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 356,001 |
| European Geography By Letter - E | 0 | - | 4.22 | 110,403 |
| European Geography By Letter - F | 0 | - | 4.18 | 89,880 |
| European Geography By Letter - H | 0 | - | 4.29 | 93,366 |
| European Geography By Letter - G | 0 | - | 4.25 | 99,390 |
| European Geography By Letter - I | 0 | - | 4.11 | 92,844 |
| European Geography By Letter - K | 0 | - | 4.13 | 67,664 |
| European Geography By Letter - O | 0 | - | 4.29 | 60,585 |
| European Geography by Letter - W | 0 | - | 4.21 | 81,239 |
| European Geography By Letter - T | 0 | - | 4.40 | 73,771 |
| Europe Geography Quiz #3 | 0 | - | 4.33 | 62,625 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 49,359 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 108,224 |
| European Geography A-Z | 0 | - | 4.31 | 48,200 |
| Country Codes of Europe | 0 | - | 3.44 | 13,423 |
| The Only European Country ... | 0 | - | 4.92 | 204,004 |
| European Countries NOT in NATO | 0 | - | 4.88 | 54,317 |
| Name a Major European City A-Z | 0 | - | 4.33 | 47,828 |
| Seas of Europe | 0 | - | 4.35 | 82,430 |
| Poland Country Quiz | 0 | - | 4.23 | 61,014 |
| Famous Swiss and Austrian People | 0 | - | 4.43 | 14,319 |
| Austria... or Australia? | 0 | - | 4.73 | 102,417 |
| Famous Dutch and Belgian People | 0 | - | 4.54 | 17,650 |
| Presidents of France | 0 | - | 4.25 | 22,896 |
| France A-Z | 0 | - | 4.16 | 37,561 |
| Word Chain - France | 0 | - | 4.38 | 42,024 |
| History of Germany | 0 | - | 4.38 | 51,971 |
| Ancient Greek Trivia | 0 | - | 4.61 | 65,896 |
| Greek Mythology General Knowledge #2 | 0 | - | 4.57 | 63,225 |
| Ancient Greece - Multiple Choice | 0 | - | 4.54 | 40,774 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,167 |
| Iceland... or Ireland? | 0 | - | 4.74 | 56,017 |
| Italian Foods | 0 | - | 4.30 | 70,304 |
| Countries Italy Declared War On | 0 | - | 4.74 | 42,251 |
| The Mafia Quiz | 0 | - | 4.46 | 22,853 |
| Ancient Roman Trivia #2 | 0 | - | 4.56 | 37,857 |
