| Netherlands Immigration by Country | 0 | - | 4.93 | 52,970 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 533,266 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,174 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,270 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,325 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,630 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,236 |
| States of Germany | 0 | - | 4.95 | 155,060 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,859 |
| Regions of Italy | 0 | - | 4.92 | 77,323 |
| History of The Netherlands | 0 | - | 4.46 | 17,580 |
| Regions of Spain Quiz | 0 | - | 4.91 | 115,681 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,963 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,170 |
| Departments of France | 0 | - | 4.93 | 55,479 |
| Famous Germans | 0 | - | 4.50 | 55,899 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,586 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,796 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,979 |
| England or Wales? | 0 | - | 4.94 | 46,094 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,888 |
| Official European Union Languages | 0 | - | 4.97 | 240,469 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,890 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,574 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,502 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,814 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,855 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,414 |
| Famous French People | 0 | - | 4.05 | 36,196 |
| The Mafia Quiz | 0 | - | 4.46 | 23,455 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,121 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,242 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,867 |
| Celtic Nations | 0 | - | 4.61 | 47,131 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,541 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,987 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,543 |
| European Geography By Letter - D | 0 | - | 4.49 | 119,104 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,487 |
| European Geography By Letter - M | 0 | - | 4.70 | 133,019 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,424 |
| European Geography By Letter - R | 0 | - | 4.43 | 95,000 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,275 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,911 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,658 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,347 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,775 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,690 |
| Regions of France | 0 | - | 4.70 | 122,515 |
| France A-Z | 0 | - | 4.16 | 38,371 |
| France Immigration by Country | 0 | - | 4.70 | 77,043 |
| German Groups of Things | 0 | - | 4.47 | 38,684 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,775 |
| Germany True or False? | 0 | - | 4.61 | 49,090 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,534 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,616 |
| Switzerland A-Z | 0 | - | 4.45 | 25,803 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,519 |
| Counties of England | 0 | - | 4.97 | 804,754 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,999 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,863 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 363,063 |
| Add A Letter - Make a European City | 0 | - | 4.88 | 23,543 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,044 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,936 |
| Federal Subjects of Russia | 0 | - | 4.95 | 150,037 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,874 |
| States of Germany Map Quiz | 0 | - | 4.92 | 134,057 |
| Famous Nordic People | 0 | - | 4.34 | 20,361 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,652 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,967 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,694 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,368 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,586 |
| People on Money - England | 0 | - | 4.30 | 21,257 |
| Champions League Winners | 0 | - | 4.92 | 1,018,654 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 67,182 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.74 | 58,843 |
| Netherlands Country Quiz | 0 | - | 4.52 | 81,085 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,454 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,879 |
| European Geography By Letter - E | 0 | - | 4.25 | 122,313 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,872 |
| European Geography By Letter - H | 0 | - | 4.30 | 97,529 |
| European Geography By Letter - G | 0 | - | 4.27 | 104,324 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,850 |
| European Geography By Letter - K | 0 | - | 4.15 | 71,500 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,841 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,768 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 52,081 |
| European Geography A-Z | 0 | - | 4.29 | 49,537 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,502 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,470 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,400 |
| Andorra Country Quiz | 0 | - | 4.91 | 32,024 |
| France Cities Map Quiz | 0 | - | 4.96 | 168,093 |
| Word Chain - France | 0 | - | 4.38 | 42,976 |
| Germany Country Quiz | 0 | - | 4.82 | 159,160 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,313 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,303 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,081 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,496 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,294 |
| Italian Foods | 0 | - | 4.30 | 73,429 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,656 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 187,094 |
| Canary Islands | 0 | - | 4.62 | 17,551 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,182 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,190 |
| British Spellings | 0 | - | 4.06 | 99,642 |
| British Groups of Things | 0 | - | 4.26 | 83,050 |
| British Acronyms | 0 | - | 4.40 | 45,994 |
| UK Immigration by Country | 0 | - | 4.94 | 141,953 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,136 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,382 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,133 |
| Geography of Scotland | 0 | - | 4.63 | 21,841 |
| Famous Scottish People | 0 | - | 4.22 | 18,445 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,608 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,742 |
| Word Scramble - European Countries | 0 | - | 4.72 | 142,490 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 124,652 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,951 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,092 |
| Slavic Languages | 0 | - | 4.67 | 54,805 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,322 |
| French History Multiple Choice | 0 | - | 4.55 | 33,285 |
| History of Germany | 0 | - | 4.39 | 53,010 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 653,373 |
| Name that Greek Letter | 0 | - | 4.93 | 325,406 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,765 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,671 |
| Most Common First Names in Spain | 0 | - | 4.33 | 55,410 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,570 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,079 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 70,050 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,117 |
| Wonderwall Lyrics | 0 | - | 4.25 | 74,173 |
| Malta Country Quiz | 0 | - | 4.81 | 31,277 |
| Top European Languages on a Map | 0 | - | 4.77 | 133,058 |
| Famous Russians | 0 | - | 4.16 | 23,936 |
| History of Russia Quiz | 0 | - | 4.47 | 32,032 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,913 |
| Russian History A-Z | 0 | - | 4.35 | 32,329 |
| Movies Set in France | 0 | - | 4.26 | 13,165 |
| French Inventions | 0 | - | 4.10 | 13,933 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,849 |
| History of Paris | 0 | - | 4.24 | 13,687 |
| Word Chain - Germany | 0 | - | 4.31 | 22,704 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,696 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,264 |
| The Trojan War | 0 | - | 4.83 | 40,124 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,362 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 128,117 |
| Famous Irish People | 0 | - | 4.05 | 46,087 |
| History of Italy | 0 | - | 4.55 | 32,199 |
| Word Chain - Italy | 0 | - | 4.07 | 23,235 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,570 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,186 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,732 |
| Roman Emperors | 0 | - | 4.95 | 121,525 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,482 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,428 |
| Name a Valid English City | 0 | - | 4.19 | 16,848 |
| London A-Z | 0 | - | 4.10 | 40,919 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 43,114 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 281,135 |
| Africa A-Z | 0 | - | 4.57 | 46,810 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,760 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,618 |
| Europe Map Quiz | 0 | - | 5.00 | 4,795,290 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,591 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,263 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,533 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,489 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,641 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,803 |
| Capitals of French Regions | 0 | - | 4.45 | 16,217 |
| Kings of France Quiz | 0 | - | 4.22 | 32,976 |
| Capitals of German States | 0 | - | 4.74 | 29,102 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,602 |
| Olympian Gods Quiz | 0 | - | 4.96 | 504,727 |
| Ancient Greek Words | 0 | - | 4.93 | 112,740 |
| British to American Food Translation | 0 | - | 3.38 | 52,066 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,616 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,950 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 293,056 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,566 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,181 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,745 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,310 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,748 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,423 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,433 |
| Middle East A-Z | 0 | - | 4.47 | 46,284 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,328,368 |
| Oceania Map Quiz | 0 | - | 4.98 | 660,837 |
| Australian Capitals | 0 | - | 4.92 | 62,886 |
| Canada A-Z | 0 | - | 4.73 | 33,004 |
| European Physical Geography | 0 | - | 4.26 | 33,623 |
