| European Countries by First 2 Letters | 0 | - | 4.95 | 530,905 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,952 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,389 |
| Official European Union Languages | 0 | - | 4.97 | 239,061 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,227 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,453 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,145 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,937 |
| Celtic Nations | 0 | - | 4.69 | 47,008 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,444 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,699 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,615 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,790 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,517 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,246 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,710 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,623 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,770 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,171 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,458 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,430 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,433 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,244 |
| States of Germany | 0 | - | 4.95 | 153,501 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,356 |
| Regions of Italy | 0 | - | 4.92 | 76,403 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,507 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,625 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,468 |
| Champions League Winners | 0 | - | 4.92 | 1,010,760 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,665 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,678 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,941 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,813 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,426 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,658 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,924 |
| Slavic Languages | 0 | - | 4.68 | 54,509 |
| Departments of France | 0 | - | 4.93 | 54,596 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,679 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,634 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,526 |
| England or Wales? | 0 | - | 4.94 | 45,824 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,192 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,852 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,738 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,438 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,684 |
| History of Russia Quiz | 0 | - | 4.47 | 31,968 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,792 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,902 |
| History of Italy | 0 | - | 4.55 | 32,081 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,040 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,744 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,318 |
| Australian Capitals | 0 | - | 4.92 | 62,774 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,067 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,578 |
| Capitals of French Regions | 0 | - | 4.45 | 16,121 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,421 |
| Capitals of German States | 0 | - | 4.74 | 29,002 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,417 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,266 |
| The Trojan War | 0 | - | 4.83 | 39,837 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,546 |
| Name that Greek Letter | 0 | - | 4.93 | 324,316 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,372 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,897 |
| Roman Emperors | 0 | - | 4.95 | 120,510 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,501 |
| Oceania Map Quiz | 0 | - | 4.98 | 655,495 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,084 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,486 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,877 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,425 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,090 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,459 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,273 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,091 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,344 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,925 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,385 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,044 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,339 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,317 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,953 |
| Country Codes of Europe | 0 | - | 3.43 | 13,764 |
| Regions of France | 0 | - | 4.70 | 121,391 |
| France Immigration by Country | 0 | - | 4.70 | 76,714 |
| Famous Germans | 0 | - | 4.50 | 55,561 |
| German Groups of Things | 0 | - | 4.46 | 38,546 |
| Germany True or False? | 0 | - | 4.61 | 48,916 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,191 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,895 |
| Italy True or False? | 0 | - | 4.42 | 47,505 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,539 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,363 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,503 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,714 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,025 |
| Asia Map Quiz | 0 | - | 4.99 | 920,486 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,857 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,089 |
| European Physical Geography | 0 | - | 4.26 | 33,549 |
| Geography of Russia | 0 | - | 4.57 | 21,559 |
| History of Austria | 0 | - | 4.70 | 17,922 |
| Geography of the French Empire | 0 | - | 4.45 | 27,167 |
| The French Revolution | 0 | - | 4.47 | 24,076 |
| France Multiple Choice | 0 | - | 4.39 | 40,781 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,200 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,688 |
| The Vikings! | 0 | - | 4.46 | 28,374 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| American to British Word Translation | 0 | - | 4.14 | 139,388 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,970 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,028 |
| Australia Map Quiz | 0 | - | 4.95 | 345,370 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,988 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,764 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,792 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,279 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,876 |
| The Only European Country ... | 0 | - | 4.91 | 217,681 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,765 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 28,337 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,037 |
| Presidents of France | 0 | - | 4.25 | 24,233 |
| History of France | 0 | - | 4.61 | 57,339 |
| Ancient Greek Words | 0 | - | 4.93 | 112,023 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,243 |
| Kings of Spain Quiz | 0 | - | 4.14 | 14,074 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,203 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,739 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,294 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,176 |
| Champions League Top 4 | 0 | - | 4.77 | 137,523 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,421 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,385,248 |
| Countries of Africa | 0 | - | 5.00 | 2,547,389 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,185 |
| African East Coast | 0 | - | 4.96 | 96,374 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,225 |
| Australian States and Territories | 0 | - | 4.96 | 142,342 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,384 |
| Australia True or False | 0 | - | 4.87 | 56,988 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,748 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,456 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,205 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,654 |
| North America Map Quiz | 0 | - | 4.98 | 249,745 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,832 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,653 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,353 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 42,994 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,657 |
| Sahel Countries on a Map | 0 | - | 4.99 | 21,374 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,341 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,687 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,534 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,222 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,968 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,601 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,074 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,206 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,771 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,490 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,034 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,540 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,648 |
| European Geography A-Z | 0 | - | 4.29 | 49,384 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,449 |
| European Geographic Groups of Four | 0 | - | 4.57 | 15,909 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,778 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,679 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,488 |
| Slavic Countries | 0 | - | 4.96 | 111,979 |
| Austria... or Australia? | 0 | - | 4.68 | 104,555 |
| Famous French People | 0 | - | 4.07 | 35,908 |
| Word Chain - France | 0 | - | 4.38 | 42,864 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,517 |
| Geography of Germany | 0 | - | 4.35 | 17,216 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,109 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,968 |
| Italian Foods | 0 | - | 4.30 | 73,002 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,458 |
| The Mafia Quiz | 0 | - | 4.46 | 23,390 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,328 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,313 |
| History of The Netherlands | 0 | - | 4.46 | 17,498 |
| History of Spain | 0 | - | 4.23 | 21,130 |
| Languages of Spain | 0 | - | 4.36 | 23,363 |
| Canary Islands | 0 | - | 4.62 | 17,499 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,862 |
| British to American Word Translation | 0 | - | 3.74 | 255,202 |
| British Foods by Description | 0 | - | 3.94 | 48,348 |
| British Spellings | 0 | - | 4.06 | 99,526 |
| British Groups of Things | 0 | - | 4.25 | 82,926 |
| British and American Word Differences | 0 | - | 2.63 | 46,903 |
| British Acronyms | 0 | - | 4.40 | 45,868 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,063 |
