| European Countries by First 2 Letters | 0 | - | 4.95 | 530,921 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,964 |
| States of Germany | 0 | - | 4.95 | 153,522 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,359 |
| Regions of Italy | 0 | - | 4.92 | 76,407 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,511 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,636 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,478 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,988 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,495 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,671 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,949 |
| Departments of France | 0 | - | 4.93 | 54,604 |
| German Groups of Things | 0 | - | 4.46 | 38,549 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,636 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,675 |
| Most Common Surnames in the UK | 0 | - | 4.22 | 69,799 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,506 |
| England or Wales? | 0 | - | 4.94 | 45,827 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,398 |
| Official European Union Languages | 0 | - | 4.97 | 239,075 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,231 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,499 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,904 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,148 |
| Word Chain - France | 0 | - | 4.38 | 42,866 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,429 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,268 |
| Italian Foods | 0 | - | 4.30 | 73,004 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,937 |
| British Groups of Things | 0 | - | 4.25 | 82,930 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,063 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,444 |
| Celtic Nations | 0 | - | 4.69 | 47,008 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,387 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,044 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,331,691 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,342 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,319 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,709 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,626 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,815 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,648 |
| Regions of France | 0 | - | 4.70 | 121,406 |
| France Immigration by Country | 0 | - | 4.70 | 76,717 |
| Famous Germans | 0 | - | 4.50 | 55,566 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,520 |
| Germany True or False? | 0 | - | 4.61 | 48,918 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,249 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,193 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,901 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,539 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,365 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 42,055 |
| Counties of England | 0 | - | 4.97 | 799,773 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,715 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,750 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,347 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,204 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,465 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,460 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,448 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,266 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,964 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,318 |
| Word Chain - Germany | 0 | - | 4.31 | 22,638 |
| Word Chain - Italy | 0 | - | 4.07 | 23,198 |
| Most Common Last Names in Sweden | 0 | - | 4.49 | 15,439 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,444 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,230 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,344 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,369 |
| Members of the British Royal Family | 0 | - | 4.10 | 114,372 |
| Name a Valid English City | 0 | - | 4.19 | 16,764 |
| Champions League Winners | 0 | - | 4.92 | 1,010,820 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,652 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,439 |
| Divided World City Name Puzzle #1 | 0 | - | 4.84 | 49,031 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 37,233 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 49,026 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,395 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,625 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,629 |
| Austria Country Quiz | 0 | - | 4.57 | 59,882 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,246 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,204 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,771 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,805 |
| 75 Americans Named John | 0 | - | 4.41 | 23,935 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,772 |
| European Geographic Groups of Four | 0 | - | 4.57 | 16,203 |
| Name a Valid European Country #1 | 0 | - | 4.99 | 262,745 |
| Name a Valid European Country #2 | 0 | - | 4.94 | 115,233 |
| Andorra Country Quiz | 0 | - | 4.91 | 31,812 |
| Austria... or Australia? | 0 | - | 4.68 | 104,560 |
| Famous French People | 0 | - | 4.07 | 35,912 |
| France Cities Map Quiz | 0 | - | 4.96 | 167,285 |
| Germany Country Quiz | 0 | - | 4.83 | 158,310 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 126,733 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,112 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,968 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 149,795 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 152,700 |
| The Mafia Quiz | 0 | - | 4.46 | 23,391 |
| History of The Netherlands | 0 | - | 4.46 | 17,499 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 97,174 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 186,338 |
| Canary Islands | 0 | - | 4.62 | 17,499 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,370 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,864 |
| British Spellings | 0 | - | 4.06 | 99,527 |
| British to American Food Translation | 0 | - | 3.38 | 51,991 |
| British Acronyms | 0 | - | 4.40 | 45,869 |
| UK Immigration by Country | 0 | - | 4.94 | 141,244 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 140,335 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,143 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,990 |
| Geography of Scotland | 0 | - | 4.63 | 21,677 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,211 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,858 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,476 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,217 |
| Name a Valid Asian Country | 0 | - | 4.98 | 121,344 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,711 |
| Name a Valid African Country | 0 | - | 4.98 | 154,500 |
| U.S. Baby Boy Names by Decade | 0 | - | 4.55 | 490,764 |
| U.S. Baby Girl Names by Decade | 0 | - | 4.42 | 714,265 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,667 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,678 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,946 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,819 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,685 |
| Category Elimination - European Countries #1 | 0 | - | 4.90 | 90,517 |
| Random Point on Land to European Country | 0 | - | 4.94 | 77,559 |
| Slavic Languages | 0 | - | 4.68 | 54,513 |
| Countries Bordering Austria | 0 | - | 4.97 | 118,716 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,098 |
| France A-Z | 0 | - | 4.16 | 38,281 |
| French History Multiple Choice | 0 | - | 4.55 | 33,145 |
| History of Germany | 0 | - | 4.39 | 52,912 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,578 |
| Name that Greek Letter | 0 | - | 4.93 | 324,325 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,682 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,365 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,529 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,133 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,580 |
| Switzerland A-Z | 0 | - | 4.45 | 25,700 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,900 |
| Malta Country Quiz | 0 | - | 4.81 | 31,135 |
| Topological Map of Asia Quiz | 0 | - | 4.81 | 20,271 |
| Nicknames in World History | 0 | - | 4.74 | 37,877 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,946 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,620 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,443 |
| History of Russia Quiz | 0 | - | 4.47 | 31,970 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,794 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,150 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,280 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,183 |
| Movies Set in France | 0 | - | 4.26 | 13,135 |
| French Inventions | 0 | - | 4.10 | 13,911 |
| French Foods | 0 | - | 4.00 | 27,735 |
| History of Paris | 0 | - | 4.24 | 13,665 |
| The Trojan War | 0 | - | 4.83 | 39,843 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,391 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,710 |
| History of Italy | 0 | - | 4.55 | 32,082 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,050 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,135 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,949 |
| Roman Emperors | 0 | - | 4.95 | 120,521 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,744 |
| Famous Nordic People | 0 | - | 4.34 | 20,197 |
| Countries that Beat Iceland | 0 | - | 4.81 | 43,020 |
| Countries that Beat Portugal | 0 | - | 4.86 | 59,581 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,625 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,322 |
| Geography of Spain | 0 | - | 4.59 | 22,117 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,549 |
| People on Money - England | 0 | - | 4.29 | 16,627 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,895 |
| Countries that Beat Indonesia | 0 | - | 4.86 | 56,158 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,747 |
| Last Names by Country of Origin | 0 | - | 4.64 | 156,984 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,287 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,290 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,093 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,494 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,880 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,434 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,103 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,476 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,281 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,097 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,348 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,934 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,264 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,962 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,579 |
