| European Countries by First 2 Letters | 0 | - | 4.95 | 527,909 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 211,194 |
| States of Germany | 0 | - | 4.96 | 151,181 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,601 |
| Regions of Italy | 0 | - | 4.92 | 75,251 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 49,946 |
| Regions of Spain Quiz | 0 | - | 4.90 | 113,236 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,764 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,809 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,907 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,793 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,166 |
| Departments of France | 0 | - | 4.93 | 53,405 |
| German Groups of Things | 0 | - | 4.46 | 38,390 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,453 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,541 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,581 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,864 |
| England or Wales? | 0 | - | 4.94 | 45,504 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,873 |
| Official European Union Languages | 0 | - | 4.97 | 237,716 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,356 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,666 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,644 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,767 |
| Word Chain - France | 0 | - | 4.38 | 42,682 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,899 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,779 |
| Italian Foods | 0 | - | 4.31 | 72,486 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,676 |
| British Groups of Things | 0 | - | 4.25 | 82,786 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,999 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,321 |
| Celtic Nations | 0 | - | 4.69 | 46,878 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,148 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,794 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,323,764 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,087 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,130 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,128 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,422 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 169,610 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,592 |
| Regions of France | 0 | - | 4.77 | 120,019 |
| France Immigration by Country | 0 | - | 4.72 | 76,241 |
| Famous Germans | 0 | - | 4.50 | 54,857 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,208 |
| Germany True or False? | 0 | - | 4.61 | 48,664 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,774 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,753 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,924 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,082 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,161 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,973 |
| Counties of England | 0 | - | 4.97 | 792,879 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,512 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 352,734 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,211 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,757 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,638 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,637 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,720 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,384 |
| Federal Subjects of Russia | 0 | - | 4.94 | 145,435 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,849 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,204 |
| Word Chain - Germany | 0 | - | 4.31 | 22,532 |
| Word Chain - Italy | 0 | - | 4.07 | 23,136 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,343 |
| UK Cities Map Quiz | 0 | - | 4.96 | 463,413 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,374 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,695 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,304 |
| Members of the British Royal Family | 0 | - | 4.10 | 113,927 |
| Name a Valid English City | 0 | - | 4.19 | 16,681 |
| Champions League Winners | 0 | - | 4.92 | 1,001,083 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 134,821 |
| Divided World City Name Puzzle #1 | 0 | - | 4.87 | 48,374 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 36,689 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,233 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,934 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,403 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,302 |
| Austria Country Quiz | 0 | - | 4.57 | 59,549 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,910 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,461 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,624 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,820 |
| Name a Valid African Country | 0 | - | 4.98 | 153,471 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,677 |
| 75 Americans Named John | 0 | - | 4.41 | 23,867 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,540 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 258,913 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 113,981 |
| Austria... or Australia? | 0 | - | 4.68 | 104,122 |
| France Cities Map Quiz | 0 | - | 4.96 | 166,022 |
| Germany Country Quiz | 0 | - | 4.82 | 157,238 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,615 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,876 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,845 |
| Italy Country Quiz | 0 | - | 4.82 | 122,735 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,869 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,521 |
| The Mafia Quiz | 0 | - | 4.46 | 23,256 |
| History of The Netherlands | 0 | - | 4.46 | 17,371 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,466 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 185,080 |
| Canary Islands | 0 | - | 4.61 | 17,441 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,470 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,452 |
| British Spellings | 0 | - | 4.06 | 99,360 |
| British to American Food Translation | 0 | - | 3.38 | 51,912 |
| British Acronyms | 0 | - | 4.39 | 45,712 |
| UK Immigration by Country | 0 | - | 4.94 | 140,408 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 139,023 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,924 |
| Geography of Scotland | 0 | - | 4.63 | 21,557 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 129,318 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,616 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,377 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,087 |
| Name a Valid Asian Country | 0 | - | 4.98 | 120,522 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 487,779 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 711,103 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,515 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,628 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,317 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,917 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,161 |
| Category Elimination - European Countries #1 | 0 | - | 4.89 | 89,535 |
| Slavic Languages | 0 | - | 4.68 | 54,168 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,543 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,050 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,003 |
| France A-Z | 0 | - | 4.16 | 38,116 |
| French History Multiple Choice | 0 | - | 4.55 | 32,958 |
| History of Germany | 0 | - | 4.39 | 52,731 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 644,840 |
| Name that Greek Letter | 0 | - | 4.93 | 322,626 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,530 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,734 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,366 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,370 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,883 |
| Switzerland A-Z | 0 | - | 4.45 | 25,582 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,594 |
| Malta Country Quiz | 0 | - | 4.81 | 30,947 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,018 |
| Nicknames in World History | 0 | - | 4.74 | 37,613 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,456 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,200 |
| Countries that Beat Canada | 0 | - | 4.90 | 87,139 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,619 |
| History of Russia Quiz | 0 | - | 4.49 | 31,850 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,646 |
| Countries that Beat Russia | 0 | - | 4.81 | 82,278 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,160 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,233 |
| Famous French People | 0 | - | 4.12 | 28,149 |
| Movies Set in France | 0 | - | 4.26 | 13,100 |
| French Inventions | 0 | - | 4.08 | 13,878 |
| French Foods | 0 | - | 4.00 | 27,643 |
| History of Paris | 0 | - | 4.24 | 13,629 |
| The Trojan War | 0 | - | 4.83 | 39,581 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,215 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 125,149 |
| History of Italy | 0 | - | 4.55 | 31,908 |
| Italy Multiple Choice | 0 | - | 4.73 | 103,483 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,071 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,307 |
| Roman Emperors | 0 | - | 4.95 | 119,356 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,572 |
| Famous Nordic People | 0 | - | 4.34 | 19,998 |
| Countries that Beat Iceland | 0 | - | 4.81 | 42,557 |
| Countries that Beat Portugal | 0 | - | 4.86 | 58,969 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,570 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,103 |
| Geography of Spain | 0 | - | 4.59 | 22,021 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,503 |
| People on Money - England | 0 | - | 4.29 | 16,591 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,519 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,231 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 55,514 |
| Last Names by Country of Origin | 0 | - | 4.63 | 156,199 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,910 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,031 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,155 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,700 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,144 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,121 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,004 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,457 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,356 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,043 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,823 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,453 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,626 |
| Europe Map Quiz | 0 | - | 5.00 | 4,747,313 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,811 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,261 |
