| European Countries by First 2 Letters | 0 | - | 4.95 | 530,014 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 214,016 |
| States of Germany | 0 | - | 4.95 | 152,859 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,157 |
| Regions of Italy | 0 | - | 4.92 | 76,052 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,287 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,134 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,291 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,649 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,565 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,100 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,325 |
| Departments of France | 0 | - | 4.93 | 54,264 |
| German Groups of Things | 0 | - | 4.46 | 38,493 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,565 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,628 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,719 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,326 |
| England or Wales? | 0 | - | 4.94 | 45,745 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,225 |
| Official European Union Languages | 0 | - | 4.97 | 238,684 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,974 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,553 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,809 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,033 |
| Word Chain - France | 0 | - | 4.38 | 42,798 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,275 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,101 |
| Italian Foods | 0 | - | 4.30 | 72,840 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,418 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,868 |
| British Groups of Things | 0 | - | 4.25 | 82,887 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,046 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,409 |
| Celtic Nations | 0 | - | 4.69 | 46,966 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,312 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,977 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,329,634 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,263 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,264 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,446 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,841 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,318 |
| Regions of France | 0 | - | 4.72 | 120,973 |
| France Immigration by Country | 0 | - | 4.70 | 76,591 |
| Famous Germans | 0 | - | 4.50 | 55,348 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,392 |
| Germany True or False? | 0 | - | 4.61 | 48,842 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,107 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,067 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,557 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,437 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,289 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,028 |
| Counties of England | 0 | - | 4.97 | 797,834 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,660 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,992 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,363 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,194 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,239 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,734 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,118 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,619 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,597 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,967 |
| Word Chain - Germany | 0 | - | 4.31 | 22,598 |
| Word Chain - Italy | 0 | - | 4.07 | 23,171 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,421 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,843 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,062 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,854 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,348 |
| Members of the British Royal Family | 0 | - | 4.10 | 114,310 |
| Name a Valid English City | 0 | - | 4.19 | 16,736 |
| Champions League Winners | 0 | - | 4.92 | 1,008,165 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,404 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,874 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 37,084 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,803 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,278 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,558 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,528 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,169 |
| Portugal Country Quiz | 0 | - | 4.69 | 71,955 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,083 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,721 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,453 |
| Name a Valid African Country | 0 | - | 4.98 | 154,207 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,774 |
| 75 Americans Named John | 0 | - | 4.41 | 23,915 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,712 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 261,491 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 114,865 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,725 |
| Famous French People | 0 | - | 4.07 | 35,673 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,920 |
| Germany Country Quiz | 0 | - | 4.83 | 158,003 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,464 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,034 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,934 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,519 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,158 |
| The Mafia Quiz | 0 | - | 4.46 | 23,345 |
| History of The Netherlands | 0 | - | 4.46 | 17,449 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,008 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,779 |
| Canary Islands | 0 | - | 4.62 | 17,486 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,128 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,766 |
| British Spellings | 0 | - | 4.06 | 99,472 |
| British to American Food Translation | 0 | - | 3.38 | 51,970 |
| British Acronyms | 0 | - | 4.40 | 45,819 |
| UK Immigration by Country | 0 | - | 4.94 | 141,020 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,988 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,786 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,879 |
| Geography of Scotland | 0 | - | 4.63 | 21,634 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,674 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,803 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,178 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,923 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,115 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 489,820 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 713,223 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,620 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,667 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,774 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,259 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,543 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 90,189 |
| Slavic Languages | 0 | - | 4.68 | 54,409 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,629 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,074 |
| France A-Z | 0 | - | 4.16 | 38,225 |
| French History Multiple Choice | 0 | - | 4.55 | 33,084 |
| History of Germany | 0 | - | 4.39 | 52,865 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,120 |
| Name that Greek Letter | 0 | - | 4.93 | 323,971 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,635 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,196 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,491 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,964 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,369 |
| Switzerland A-Z | 0 | - | 4.45 | 25,661 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,809 |
| Malta Country Quiz | 0 | - | 4.81 | 31,087 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,182 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,397 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,629 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,137 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,195 |
| History of Russia Quiz | 0 | - | 4.47 | 31,938 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,756 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,941 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,247 |
| Movies Set in France | 0 | - | 4.26 | 13,124 |
| French Inventions | 0 | - | 4.08 | 13,900 |
| French Foods | 0 | - | 4.00 | 27,709 |
| History of Paris | 0 | - | 4.24 | 13,655 |
| The Trojan War | 0 | - | 4.83 | 39,766 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,002 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,210 |
| History of Italy | 0 | - | 4.55 | 32,017 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,851 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,116 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,591 |
| Roman Emperors | 0 | - | 4.95 | 120,201 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,690 |
| Famous Nordic People | 0 | - | 4.34 | 20,146 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,935 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,616 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,267 |
| Geography of Spain | 0 | - | 4.59 | 22,088 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,537 |
| People on Money - England | 0 | - | 4.29 | 16,620 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,392 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 56,029 |
| Last Names by Country of Origin | 0 | - | 4.64 | 156,580 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,979 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,220 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,261 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,452 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 119,815 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,145 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,778 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,639 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,836 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,654 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,955 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,804 |
| European Geography By Letter - V | 0 | - | 4.43 | 93,095 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,548 |
| Europe Map Quiz | 0 | - | 5.00 | 4,766,663 |
| European Geography By Letter - S #1 | 0 | - | 4.62 | 100,691 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,503 |
| Capitals of French Regions | 0 | - | 4.45 | 16,090 |
| Kings of France Quiz | 0 | - | 4.20 | 32,768 |
| Capitals of German States | 0 | - | 4.74 | 28,974 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,363 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,338 |
