| European Countries by First 2 Letters | 0 | - | 4.95 | 531,332 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,808 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,293 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,742 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,427 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,563 |
| States of Germany | 0 | - | 4.95 | 153,755 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,439 |
| Regions of Italy | 0 | - | 4.92 | 76,519 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,572 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,814 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,527 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,029 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,103 |
| Departments of France | 0 | - | 4.93 | 54,725 |
| Famous Germans | 0 | - | 4.50 | 55,609 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,992 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,666 |
| England or Wales? | 0 | - | 4.94 | 45,854 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,481 |
| Official European Union Languages | 0 | - | 4.97 | 239,256 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,320 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,843 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,230 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,682 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,554 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,182 |
| Famous French People | 0 | - | 4.07 | 35,949 |
| The Mafia Quiz | 0 | - | 4.46 | 23,398 |
| History of The Netherlands | 0 | - | 4.46 | 17,510 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,969 |
| Monarchies of the World | 0 | - | 4.94 | 169,607 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,459 |
| Celtic Nations | 0 | - | 4.69 | 47,043 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,191 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,597 |
| European Geography By Letter - C | 0 | - | 4.46 | 115,927 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,526 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,184 |
| European Geography By Letter - M | 0 | - | 4.69 | 131,624 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,584 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,151 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,402 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,008 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,009 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,889 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 174,388 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,654 |
| Regions of France | 0 | - | 4.70 | 121,548 |
| France A-Z | 0 | - | 4.16 | 38,295 |
| France Immigration by Country | 0 | - | 4.70 | 76,776 |
| German Groups of Things | 0 | - | 4.47 | 38,568 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,561 |
| Germany True or False? | 0 | - | 4.61 | 48,935 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,286 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,271 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,578 |
| Switzerland A-Z | 0 | - | 4.45 | 25,723 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,371 |
| Counties of England | 0 | - | 4.97 | 800,444 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,573 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,733 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,413 |
| Monarchies Bordering Monarchies | 0 | - | 4.81 | 60,490 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,492 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,524 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,492 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,065 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,416 |
| Famous Nordic People | 0 | - | 4.34 | 20,222 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,627 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,660 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,297 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,485 |
| People on Money - England | 0 | - | 4.29 | 16,631 |
| Champions League Winners | 0 | - | 4.92 | 1,011,925 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,790 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,659 |
| Belgium Country Quiz | 0 | - | 4.72 | 72,053 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,280 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,783 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,417 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,748 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,610 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,292 |
| European Geography By Letter - I | 0 | - | 4.09 | 96,027 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,667 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,141 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,254 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,527 |
| European Geography A-Z | 0 | - | 4.29 | 49,405 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,789 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,926 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,160 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,841 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,397 |
| Word Chain - France | 0 | - | 4.38 | 42,881 |
| Germany Country Quiz | 0 | - | 4.83 | 158,460 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,808 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,148 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,984 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,889 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,773 |
| Italian Foods | 0 | - | 4.30 | 73,058 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,252 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,467 |
| Canary Islands | 0 | - | 4.62 | 17,505 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,471 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,916 |
| British Spellings | 0 | - | 4.06 | 99,536 |
| British Groups of Things | 0 | - | 4.25 | 82,954 |
| British Acronyms | 0 | - | 4.40 | 45,884 |
| UK Immigration by Country | 0 | - | 4.94 | 141,343 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,076 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,487 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,283 |
| Geography of Scotland | 0 | - | 4.63 | 21,693 |
| Famous Scottish People | 0 | - | 4.22 | 18,421 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,406 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,691 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,043 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,039 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,725 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,720 |
| Slavic Languages | 0 | - | 4.68 | 54,559 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,979 |
| French History Multiple Choice | 0 | - | 4.55 | 33,160 |
| History of Germany | 0 | - | 4.39 | 52,928 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,100 |
| Name that Greek Letter | 0 | - | 4.93 | 324,478 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,694 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,431 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,568 |
| Most Common First Names in Spain | 0 | - | 4.31 | 53,018 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,643 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,869 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,062 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,948 |
| Malta Country Quiz | 0 | - | 4.81 | 31,163 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,540 |
| Famous Russians | 0 | - | 4.16 | 23,886 |
| History of Russia Quiz | 0 | - | 4.47 | 31,976 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,817 |
| Russian History A-Z | 0 | - | 4.35 | 31,943 |
| Movies Set in France | 0 | - | 4.26 | 13,138 |
| French Inventions | 0 | - | 4.10 | 13,913 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,501 |
| History of Paris | 0 | - | 4.24 | 13,665 |
| Word Chain - Germany | 0 | - | 4.31 | 22,647 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,358 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,200 |
| The Trojan War | 0 | - | 4.83 | 39,899 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,528 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,893 |
| Famous Irish People | 0 | - | 4.05 | 46,041 |
| History of Italy | 0 | - | 4.55 | 32,096 |
| Word Chain - Italy | 0 | - | 4.07 | 23,201 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,122 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,140 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,376 |
| Roman Emperors | 0 | - | 4.95 | 120,703 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,761 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,356 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,374 |
| Name a Valid English City | 0 | - | 4.19 | 16,775 |
| London A-Z | 0 | - | 4.10 | 40,841 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 42,763 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,114 |
| Africa A-Z | 0 | - | 4.57 | 46,724 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,873 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,361 |
| Europe Map Quiz | 0 | - | 5.00 | 4,777,029 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,419 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,076 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,371 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,341 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,369 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,604 |
| Capitals of French Regions | 0 | - | 4.45 | 16,144 |
| Kings of France Quiz | 0 | - | 4.20 | 32,860 |
| Capitals of German States | 0 | - | 4.74 | 29,028 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,448 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,573 |
| Ancient Greek Words | 0 | - | 4.93 | 112,130 |
| British to American Food Translation | 0 | - | 3.38 | 52,004 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,524 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,580 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,360 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,313 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 65,903 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,540 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,058 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,519 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,183 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,114 |
| Middle East A-Z | 0 | - | 4.47 | 46,192 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,321,929 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,000 |
| Australian Capitals | 0 | - | 4.92 | 62,791 |
| Canada A-Z | 0 | - | 4.73 | 32,920 |
