| European Countries by First 2 Letters | 0 | - | 4.95 | 531,601 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,862 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,509 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 88,149 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,787 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,661 |
| States of Germany | 0 | - | 4.95 | 153,897 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,501 |
| Regions of Italy | 0 | - | 4.92 | 76,616 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,629 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,951 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,575 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,111 |
| Departments of France | 0 | - | 4.93 | 54,813 |
| Famous Germans | 0 | - | 4.50 | 55,646 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,028 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,691 |
| England or Wales? | 0 | - | 4.94 | 45,879 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,533 |
| Official European Union Languages | 0 | - | 4.97 | 239,372 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,400 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,057 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,249 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,696 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,204 |
| Famous French People | 0 | - | 4.07 | 35,979 |
| The Mafia Quiz | 0 | - | 4.46 | 23,404 |
| History of The Netherlands | 0 | - | 4.46 | 17,522 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,988 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,051 |
| Countries with the Longest High Speed Rail Networks | 0 | - | 4.91 | 66,059 |
| Cities with the Most Metro Rail Stations | 0 | - | 4.89 | 102,769 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,464 |
| Celtic Nations | 0 | - | 4.61 | 47,054 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,573 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 120,940 |
| European Geography By Letter - C | 0 | - | 4.43 | 122,169 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,946 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,615 |
| European Geography By Letter - M | 0 | - | 4.69 | 131,954 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,793 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,321 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,541 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,224 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,158 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,056 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,745 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,656 |
| Regions of France | 0 | - | 4.70 | 121,677 |
| France A-Z | 0 | - | 4.16 | 38,305 |
| France Immigration by Country | 0 | - | 4.70 | 76,815 |
| German Groups of Things | 0 | - | 4.47 | 38,585 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,600 |
| Germany True or False? | 0 | - | 4.61 | 48,955 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,323 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,298 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,610 |
| Switzerland A-Z | 0 | - | 4.45 | 25,736 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,375 |
| Counties of England | 0 | - | 4.97 | 800,957 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,625 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,755 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,873 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,559 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,572 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,747 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,267 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,490 |
| Famous Nordic People | 0 | - | 4.34 | 20,233 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,627 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,815 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,347 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,615 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,562 |
| People on Money - England | 0 | - | 4.29 | 16,634 |
| Champions League Winners | 0 | - | 4.92 | 1,012,648 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,855 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,679 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,097 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,301 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,801 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,718 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,023 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,837 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,537 |
| European Geography By Letter - I | 0 | - | 4.09 | 96,237 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,884 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,303 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,378 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,668 |
| European Geography A-Z | 0 | - | 4.29 | 49,426 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,993 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,065 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,321 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,867 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,487 |
| Word Chain - France | 0 | - | 4.38 | 42,895 |
| Germany Country Quiz | 0 | - | 4.83 | 158,536 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,866 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,164 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,997 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,985 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,848 |
| Italian Foods | 0 | - | 4.30 | 73,104 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,298 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,553 |
| Canary Islands | 0 | - | 4.62 | 17,508 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,542 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,942 |
| British Spellings | 0 | - | 4.06 | 99,547 |
| British Groups of Things | 0 | - | 4.25 | 82,966 |
| British Acronyms | 0 | - | 4.40 | 45,897 |
| UK Immigration by Country | 0 | - | 4.94 | 141,421 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,082 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,595 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,401 |
| Geography of Scotland | 0 | - | 4.63 | 21,703 |
| Famous Scottish People | 0 | - | 4.22 | 18,424 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,544 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,697 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,131 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,210 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,748 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,759 |
| Slavic Languages | 0 | - | 4.68 | 54,590 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,000 |
| French History Multiple Choice | 0 | - | 4.55 | 33,170 |
| History of Germany | 0 | - | 4.39 | 52,937 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,454 |
| Name that Greek Letter | 0 | - | 4.93 | 324,599 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,701 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,481 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,583 |
| Most Common First Names in Spain | 0 | - | 4.32 | 54,574 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,235 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,691 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,899 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,068 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,997 |
| Malta Country Quiz | 0 | - | 4.81 | 31,189 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,599 |
| Famous Russians | 0 | - | 4.16 | 23,890 |
| History of Russia Quiz | 0 | - | 4.47 | 31,980 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,827 |
| Russian History A-Z | 0 | - | 4.35 | 32,046 |
| Movies Set in France | 0 | - | 4.26 | 13,139 |
| French Inventions | 0 | - | 4.10 | 13,918 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,553 |
| History of Paris | 0 | - | 4.24 | 13,667 |
| Word Chain - Germany | 0 | - | 4.31 | 22,656 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,409 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,208 |
| The Trojan War | 0 | - | 4.83 | 39,920 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,627 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,054 |
| Famous Irish People | 0 | - | 4.05 | 46,046 |
| History of Italy | 0 | - | 4.55 | 32,104 |
| Word Chain - Italy | 0 | - | 4.07 | 23,204 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,168 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,144 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,448 |
| Roman Emperors | 0 | - | 4.95 | 120,803 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,772 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,371 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,379 |
| Name a Valid English City | 0 | - | 4.19 | 16,783 |
| UK General Knowledge Multiple Choice #3 | 0 | - | 4.53 | 18,139 |
| London A-Z | 0 | - | 4.10 | 40,848 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 42,820 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,237 |
| Africa A-Z | 0 | - | 4.57 | 46,732 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,993 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,393 |
| Europe Map Quiz | 0 | - | 5.00 | 4,779,400 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,441 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,092 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,394 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,361 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,402 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,629 |
| Capitals of French Regions | 0 | - | 4.45 | 16,150 |
| Kings of France Quiz | 0 | - | 4.20 | 32,866 |
| Capitals of German States | 0 | - | 4.74 | 29,032 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,476 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,836 |
| Ancient Greek Words | 0 | - | 4.93 | 112,198 |
| British to American Food Translation | 0 | - | 3.38 | 52,013 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,535 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,747 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,522 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,348 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,941 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,574 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,092 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,557 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,214 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,166 |
| Middle East A-Z | 0 | - | 4.47 | 46,200 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,322,651 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,613 |
