| European Countries by First 2 Letters | 0 | - | 4.95 | 532,540 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 216,766 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,733 |
| Official European Union Languages | 0 | - | 4.97 | 239,808 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,658 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,912 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,321 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,057 |
| Celtic Nations | 0 | - | 4.61 | 47,098 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,507 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,029 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,763 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,826 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,696 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,451 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,749 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,751 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,843 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,932 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,771 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,834 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,990 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,500 |
| States of Germany | 0 | - | 4.95 | 154,514 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,696 |
| Regions of Italy | 0 | - | 4.92 | 77,086 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,808 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,323 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,767 |
| Champions League Winners | 0 | - | 4.92 | 1,016,233 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,745 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,719 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,329 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 122,158 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,881 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,935 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,937 |
| Slavic Languages | 0 | - | 4.68 | 54,696 |
| Departments of France | 0 | - | 4.93 | 55,169 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,742 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,742 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,627 |
| England or Wales? | 0 | - | 4.94 | 45,970 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,151 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,706 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,379 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,848 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,945 |
| History of Russia Quiz | 0 | - | 4.47 | 32,006 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,873 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,087 |
| History of Italy | 0 | - | 4.55 | 32,148 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,380 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,823 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,426 |
| Australian Capitals | 0 | - | 4.92 | 62,833 |
| Europe Map Quiz | 0 | - | 5.00 | 4,788,489 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,543 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,742 |
| Capitals of French Regions | 0 | - | 4.45 | 16,184 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,704 |
| Capitals of German States | 0 | - | 4.74 | 29,072 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,543 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,561 |
| The Trojan War | 0 | - | 4.83 | 39,990 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,955 |
| Name that Greek Letter | 0 | - | 4.93 | 324,988 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,965 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,594 |
| Roman Emperors | 0 | - | 4.95 | 121,210 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,570 |
| Oceania Map Quiz | 0 | - | 4.98 | 659,436 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,206 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,598 |
| European Geography By Letter - C | 0 | - | 4.43 | 124,031 |
| European Geography By Letter - D | 0 | - | 4.48 | 117,620 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,111 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,564 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,157 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,634 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,071 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,633 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,531 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,186 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,461 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,432 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,462 |
| Country Codes of Europe | 0 | - | 3.45 | 13,833 |
| Regions of France | 0 | - | 4.70 | 122,103 |
| France Immigration by Country | 0 | - | 4.70 | 76,937 |
| Famous Germans | 0 | - | 4.50 | 55,795 |
| German Groups of Things | 0 | - | 4.47 | 38,637 |
| Germany True or False? | 0 | - | 4.61 | 49,022 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,473 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,383 |
| Italy True or False? | 0 | - | 4.42 | 47,611 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,771 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,408 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,830 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,814 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,562 |
| Asia Map Quiz | 0 | - | 4.99 | 925,258 |
| Africa Map Quiz | 0 | - | 5.00 | 2,128,795 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,241 |
| European Physical Geography | 0 | - | 4.26 | 33,596 |
| Geography of Russia | 0 | - | 4.57 | 21,600 |
| History of Austria | 0 | - | 4.70 | 17,974 |
| Geography of the French Empire | 0 | - | 4.45 | 27,218 |
| The French Revolution | 0 | - | 4.47 | 24,148 |
| France Multiple Choice | 0 | - | 4.39 | 40,849 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,560 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,781 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,562 |
| The Vikings! | 0 | - | 4.46 | 28,406 |
| The Portuguese Empire | 0 | - | 4.58 | 12,106 |
| American to British Word Translation | 0 | - | 4.14 | 139,704 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,061 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,468 |
| Australia Map Quiz | 0 | - | 4.95 | 346,176 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,964 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,923 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,820 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,254 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 117,141 |
| The Only European Country ... | 0 | - | 4.91 | 219,042 |
| European Countries NOT in NATO | 0 | - | 4.90 | 62,535 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,131 |
| Presidents of France | 0 | - | 4.25 | 24,339 |
| History of France | 0 | - | 4.61 | 57,621 |
| Ancient Greek Words | 0 | - | 4.93 | 112,472 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,390 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,117 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,374 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,815 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,331 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,810 |
| Champions League Top 4 | 0 | - | 4.78 | 139,099 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,950 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,387,333 |
| Countries of Africa | 0 | - | 5.00 | 2,560,077 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,866 |
| African East Coast | 0 | - | 4.96 | 96,777 |
| Western Africa Map Quiz | 0 | - | 4.98 | 74,634 |
| Australian States and Territories | 0 | - | 4.96 | 142,871 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,505 |
| Australia True or False | 0 | - | 4.87 | 57,151 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,963 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,798 |
| Latin American Countries Map Quiz | 0 | - | 4.98 | 130,671 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,757 |
| North America Map Quiz | 0 | - | 4.98 | 252,100 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,982 |
| United States Map Quiz | 0 | - | 4.98 | 4,171,429 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,568 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 43,176 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 69,048 |
| Sahel Countries on a Map | 0 | - | 4.99 | 21,494 |
| European Geography By Letter - E | 0 | - | 4.23 | 115,252 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,527 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,238 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,000 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,604 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,242 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,610 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,608 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,898 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,916 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,518 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 152,065 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,820 |
| European Geography A-Z | 0 | - | 4.29 | 49,486 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,778 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,219 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,454 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,192 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,798 |
| Slavic Countries | 0 | - | 4.96 | 112,376 |
| Austria... or Australia? | 0 | - | 4.67 | 104,771 |
| Famous French People | 0 | - | 4.07 | 36,107 |
| Word Chain - France | 0 | - | 4.38 | 42,938 |
| Geography of Germany | 0 | - | 4.35 | 17,285 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,241 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,047 |
| Italian Foods | 0 | - | 4.30 | 73,283 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,655 |
| The Mafia Quiz | 0 | - | 4.46 | 23,439 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,840 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,504 |
| History of The Netherlands | 0 | - | 4.46 | 17,556 |
| History of Spain | 0 | - | 4.23 | 21,165 |
| Languages of Spain | 0 | - | 4.36 | 23,437 |
| Canary Islands | 0 | - | 4.62 | 17,542 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,074 |
| British to American Word Translation | 0 | - | 3.74 | 255,347 |
| British Foods by Description | 0 | - | 3.94 | 48,390 |
| British Spellings | 0 | - | 4.06 | 99,608 |
| British Groups of Things | 0 | - | 4.26 | 83,016 |
| British and American Word Differences | 0 | - | 2.63 | 46,930 |
| British Acronyms | 0 | - | 4.40 | 45,944 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,109 |
