| Netherlands Immigration by Country | 0 | - | 4.93 | 52,352 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,210 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,486 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,822 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,261 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,193 |
| States of Germany | 0 | - | 4.95 | 152,969 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,207 |
| Regions of Italy | 0 | - | 4.92 | 76,123 |
| History of The Netherlands | 0 | - | 4.46 | 17,466 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,223 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,338 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,079 |
| Departments of France | 0 | - | 4.93 | 54,352 |
| Famous Germans | 0 | - | 4.50 | 55,462 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,677 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,591 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,461 |
| England or Wales? | 0 | - | 4.94 | 45,763 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,268 |
| Official European Union Languages | 0 | - | 4.97 | 238,793 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,045 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,734 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,119 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,628 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,240 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,065 |
| Famous French People | 0 | - | 4.07 | 35,766 |
| The Mafia Quiz | 0 | - | 4.46 | 23,358 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,888 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,899 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,706 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,412 |
| Celtic Nations | 0 | - | 4.69 | 46,974 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,518 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 119,958 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,211 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,830 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,670 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,890 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,679 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,977 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,825 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,118 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,584 |
| European Geography By Letter - S #1 | 0 | - | 4.62 | 100,715 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,994 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,547 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,634 |
| Regions of France | 0 | - | 4.72 | 121,082 |
| France A-Z | 0 | - | 4.16 | 38,242 |
| France Immigration by Country | 0 | - | 4.70 | 76,631 |
| German Groups of Things | 0 | - | 4.46 | 38,501 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,423 |
| Germany True or False? | 0 | - | 4.61 | 48,860 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,143 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,104 |
| Switzerland A-Z | 0 | - | 4.45 | 25,670 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,317 |
| Counties of England | 0 | - | 4.97 | 798,226 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,369 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,673 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 357,511 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,656 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,300 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,780 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,698 |
| States of Germany Map Quiz | 0 | - | 4.91 | 133,046 |
| Famous Nordic People | 0 | - | 4.34 | 20,156 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,620 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,962 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,096 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,029 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,539 |
| People on Money - England | 0 | - | 4.29 | 16,621 |
| Champions League Winners | 0 | - | 4.91 | 1,008,882 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,597 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,547 |
| Netherlands Country Quiz | 0 | - | 4.53 | 80,603 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,188 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,730 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,922 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,267 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,183 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,873 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,659 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,296 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,836 |
| European Geography by Letter - W | 0 | - | 4.20 | 83,009 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 51,285 |
| European Geography A-Z | 0 | - | 4.29 | 49,341 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,714 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,199 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,448 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,743 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,020 |
| Word Chain - France | 0 | - | 4.38 | 42,814 |
| Germany Country Quiz | 0 | - | 4.83 | 158,088 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,537 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,051 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,939 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,571 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,223 |
| Italian Foods | 0 | - | 4.30 | 72,888 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,056 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,871 |
| Canary Islands | 0 | - | 4.62 | 17,489 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,182 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,790 |
| British Spellings | 0 | - | 4.06 | 99,487 |
| British Groups of Things | 0 | - | 4.25 | 82,895 |
| British Acronyms | 0 | - | 4.40 | 45,828 |
| UK Immigration by Country | 0 | - | 4.94 | 141,074 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,050 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,062 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,873 |
| Geography of Scotland | 0 | - | 4.63 | 21,644 |
| Famous Scottish People | 0 | - | 4.22 | 18,408 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,827 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,669 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,815 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,421 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,612 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,574 |
| Slavic Languages | 0 | - | 4.68 | 54,432 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,832 |
| French History Multiple Choice | 0 | - | 4.55 | 33,103 |
| History of Germany | 0 | - | 4.39 | 52,878 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,409 |
| Name that Greek Letter | 0 | - | 4.93 | 324,068 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,643 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,504 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,636 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,423 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,735 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,033 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,827 |
| Malta Country Quiz | 0 | - | 4.81 | 31,099 |
| Africa A-Z | 0 | - | 4.57 | 46,653 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,484 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,253 |
| Famous Russians | 0 | - | 4.16 | 23,856 |
| History of Russia Quiz | 0 | - | 4.47 | 31,943 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,762 |
| Russian History A-Z | 0 | - | 4.35 | 31,815 |
| Movies Set in France | 0 | - | 4.26 | 13,126 |
| French Inventions | 0 | - | 4.08 | 13,902 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,317 |
| History of Paris | 0 | - | 4.24 | 13,657 |
| Word Chain - Germany | 0 | - | 4.31 | 22,605 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,144 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,161 |
| The Trojan War | 0 | - | 4.83 | 39,776 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,083 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,333 |
| Famous Irish People | 0 | - | 4.05 | 46,014 |
| History of Italy | 0 | - | 4.55 | 32,035 |
| Word Chain - Italy | 0 | - | 4.07 | 23,175 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,902 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,120 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,611 |
| Roman Emperors | 0 | - | 4.95 | 120,284 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,283 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,352 |
| Name a Valid English City | 0 | - | 4.19 | 16,738 |
| London A-Z | 0 | - | 4.10 | 40,801 |
| Asian Cities A-Z by Clue | 0 | - | 4.50 | 41,172 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,465 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,260 |
| Europe Map Quiz | 0 | - | 5.00 | 4,768,290 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,329 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,993 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,276 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,277 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,519 |
| Capitals of French Regions | 0 | - | 4.45 | 16,096 |
| Kings of France Quiz | 0 | - | 4.20 | 32,795 |
| Capitals of German States | 0 | - | 4.74 | 28,979 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,379 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,554 |
| Ancient Greek Words | 0 | - | 4.93 | 111,818 |
| British to American Food Translation | 0 | - | 3.38 | 51,976 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,477 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,738 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,948 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,200 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,779 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,466 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,968 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,416 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,096 |
| Asian Geography By Letter - O | 0 | - | 4.65 | 31,971 |
| Middle East A-Z | 0 | - | 4.47 | 46,111 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,318,780 |
| Africa Map Quiz | 0 | - | 5.00 | 2,120,566 |
| Oceania Map Quiz | 0 | - | 4.98 | 643,383 |
| Australian Capitals | 0 | - | 4.92 | 62,739 |
| Canada A-Z | 0 | - | 4.73 | 32,871 |
| European Physical Geography | 0 | - | 4.26 | 33,531 |
| Geography of Russia | 0 | - | 4.57 | 21,550 |
