| European Countries by First 2 Letters | 0 | - | 4.95 | 532,826 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 217,180 |
| States of Germany | 0 | - | 4.95 | 154,776 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,761 |
| Regions of Italy | 0 | - | 4.92 | 77,197 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,863 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,483 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,844 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,663 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 236,139 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 279,190 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 169,117 |
| Departments of France | 0 | - | 4.93 | 55,302 |
| German Groups of Things | 0 | - | 4.47 | 38,653 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,760 |
| Most Common First Names in Spain | 0 | - | 4.33 | 55,342 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 70,001 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,900 |
| England or Wales? | 0 | - | 4.94 | 45,999 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,811 |
| Official European Union Languages | 0 | - | 4.97 | 239,960 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,752 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 431,202 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,119 |
| Europe Geography Decoder | 0 | - | 4.87 | 70,360 |
| Word Chain - France | 0 | - | 4.38 | 42,950 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,755 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,611 |
| Italian Foods | 0 | - | 4.30 | 73,330 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,947 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,082 |
| British Groups of Things | 0 | - | 4.26 | 83,034 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,123 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,522 |
| Celtic Nations | 0 | - | 4.61 | 47,115 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,549 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,220 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,336,654 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,483 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,449 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 88,092 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 313,001 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 176,257 |
| Regions of France | 0 | - | 4.70 | 122,261 |
| France Immigration by Country | 0 | - | 4.70 | 76,979 |
| Famous Germans | 0 | - | 4.50 | 55,840 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,724 |
| Germany True or False? | 0 | - | 4.61 | 49,049 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,496 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,543 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,484 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,874 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,425 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,097 |
| Counties of England | 0 | - | 4.97 | 803,746 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,832 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 362,263 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,732 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 99,062 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,846 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 89,019 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 82,089 |
| Federal Subjects of Russia | 0 | - | 4.95 | 149,763 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,754 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,924 |
| Word Chain - Germany | 0 | - | 4.31 | 22,693 |
| Word Chain - Italy | 0 | - | 4.07 | 23,227 |
| Most Common Last Names in Sweden | 0 | - | 4.50 | 15,492 |
| UK Cities Map Quiz | 0 | - | 4.96 | 466,675 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,584 |
| Counties of England Map Quiz | 0 | - | 4.97 | 309,186 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,420 |
| Members of the British Royal Family | 0 | - | 4.10 | 114,520 |
| Name a Valid English City | 0 | - | 4.19 | 16,835 |
| Champions League Winners | 0 | - | 4.92 | 1,017,231 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 136,212 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,605 |
| Divided World City Name Puzzle #1 | 0 | - | 4.84 | 49,438 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 37,569 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 49,624 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,828 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,783 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,785 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,417 |
| Portugal Country Quiz | 0 | - | 4.69 | 72,375 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,406 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,848 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,868 |
| 75 Americans Named John | 0 | - | 4.41 | 23,983 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,917 |
| European Geographic Groups of Four | 0 | - | 4.56 | 20,375 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 265,067 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 116,032 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,974 |
| Famous French People | 0 | - | 4.05 | 36,134 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,912 |
| Germany Country Quiz | 0 | - | 4.82 | 158,970 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 127,164 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,264 |
| Geography of Ancient Greece | 0 | - | 4.69 | 32,062 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 150,346 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 153,151 |
| The Mafia Quiz | 0 | - | 4.46 | 23,446 |
| History of The Netherlands | 0 | - | 4.46 | 17,565 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,560 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,972 |
| Canary Islands | 0 | - | 4.62 | 17,545 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,037 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 30,118 |
| British Spellings | 0 | - | 4.06 | 99,619 |
| British to American Food Translation | 0 | - | 3.38 | 52,058 |
| British Acronyms | 0 | - | 4.40 | 45,954 |
| UK Immigration by Country | 0 | - | 4.94 | 141,830 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 141,171 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,957 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,183 |
| Geography of Scotland | 0 | - | 4.63 | 21,758 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 132,341 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,988 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 111,473 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,845 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,888 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 93,524 |
| Name a Valid African Country | 0 | - | 4.98 | 155,160 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 492,269 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 716,325 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,761 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,732 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,400 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 123,339 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 66,011 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 91,198 |
| Random Point on Land to European Country | 0 | - | 4.94 | 78,151 |
| Slavic Languages | 0 | - | 4.67 | 54,743 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,677 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,153 |
| France A-Z | 0 | - | 4.16 | 38,353 |
| French History Multiple Choice | 0 | - | 4.55 | 33,258 |
| History of Germany | 0 | - | 4.39 | 52,991 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 652,541 |
| Name that Greek Letter | 0 | - | 4.93 | 325,155 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,752 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,749 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,655 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,467 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,959 |
| Switzerland A-Z | 0 | - | 4.45 | 25,781 |
| Wonderwall Lyrics | 0 | - | 4.25 | 74,128 |
| Malta Country Quiz | 0 | - | 4.81 | 31,250 |
| Topological Map of Asia Quiz | 0 | - | 4.82 | 20,485 |
| Nicknames in World History | 0 | - | 4.74 | 38,112 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,799 |
| Countries that Beat Canada | 0 | - | 4.90 | 99,071 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,950 |
| History of Russia Quiz | 0 | - | 4.47 | 32,012 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,890 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,701 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,364 |
| Movies Set in France | 0 | - | 4.26 | 13,157 |
| French Inventions | 0 | - | 4.10 | 13,930 |
| French Foods | 0 | - | 4.00 | 27,786 |
| History of Paris | 0 | - | 4.24 | 13,684 |
| The Trojan War | 0 | - | 4.83 | 40,031 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 113,092 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,743 |
| History of Italy | 0 | - | 4.55 | 32,167 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,454 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,172 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,650 |
| Roman Emperors | 0 | - | 4.95 | 121,348 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,839 |
| Famous Nordic People | 0 | - | 4.34 | 20,324 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,272 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,647 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,454 |
| Geography of Spain | 0 | - | 4.59 | 22,200 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,583 |
| People on Money - England | 0 | - | 4.29 | 16,647 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,890 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 56,526 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,567 |
| Last Names by Country of Origin | 0 | - | 4.64 | 157,374 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,443 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,351 |
| European Geography By Letter - A | 0 | - | 4.52 | 148,307 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,709 |
| European Geography By Letter - C | 0 | - | 4.44 | 124,210 |
| European Geography By Letter - D | 0 | - | 4.49 | 118,565 |
| European Geography By Letter - L | 0 | - | 4.52 | 115,239 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,739 |
| European Geography By Letter - N | 0 | - | 4.44 | 102,259 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,869 |
| European Geography By Letter - V | 0 | - | 4.43 | 94,148 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,750 |
| Europe Map Quiz | 0 | - | 5.00 | 4,791,262 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,540 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,591 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,770 |
| Capitals of French Regions | 0 | - | 4.45 | 16,191 |
| Kings of France Quiz | 0 | - | 4.21 | 32,953 |
