| England or Wales? | 0 | - | 4.94 | 45,880 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,600 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,613 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,829 |
| Australia... or New Zealand? | 0 | - | 4.83 | 61,861 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,796 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,537 |
| Official European Union Languages | 0 | - | 4.97 | 239,379 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,405 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,066 |
| Slavic Languages | 0 | - | 4.68 | 54,591 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,207 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,988 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,173 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,884 |
| Australia True or False | 0 | - | 4.87 | 57,053 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,464 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,866 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,060 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,757 |
| Germany True or False? | 0 | - | 4.61 | 48,957 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,326 |
| Italy True or False? | 0 | - | 4.42 | 47,547 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,758 |
| Champions League Winners | 0 | - | 4.92 | 1,012,672 |
| Celtic Nations | 0 | - | 4.61 | 47,055 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,511 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,578 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 88,173 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,663 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,760 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,069 |
| France Multiple Choice | 0 | - | 4.39 | 40,805 |
| States of Germany | 0 | - | 4.95 | 153,904 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,501 |
| Regions of Italy | 0 | - | 4.92 | 76,623 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,632 |
| Sweden True or False? | 0 | - | 4.53 | 40,469 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,954 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,575 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,801 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,679 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,762 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,006 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,072 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,329 |
| Lithuania Country Quiz | 0 | - | 4.63 | 31,739 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,149 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,000 |
| Departments of France | 0 | - | 4.93 | 54,818 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,692 |
| Spain True or False? | 0 | - | 4.58 | 30,714 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,547 |
| North Korea... or South Korea? | 0 | - | 4.47 | 80,899 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,699 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,698 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,132 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 116,213 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,554 |
| French History Multiple Choice | 0 | - | 4.55 | 33,170 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,410 |
| The Trojan War | 0 | - | 4.83 | 39,922 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 650,465 |
| Name that Greek Letter | 0 | - | 4.93 | 324,603 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,631 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,701 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,452 |
| Roman Emperors | 0 | - | 4.95 | 120,818 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,584 |
| Bhutan... or Nepal? | 0 | - | 4.59 | 17,857 |
| Canada Multiple Choice Quiz | 0 | - | 4.50 | 49,556 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,603 |
| History of Russia Quiz | 0 | - | 4.47 | 31,980 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,846 |
| Ancient Greek Words | 0 | - | 4.93 | 112,202 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 127,061 |
| History of Italy | 0 | - | 4.55 | 32,105 |
| Ancient Rome - True or False? | 0 | - | 4.85 | 43,215 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,774 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,372 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,758 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,525 |
| Japan Multiple Choice | 0 | - | 4.48 | 40,789 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,596 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 120,955 |
| European Geography By Letter - C | 0 | - | 4.43 | 122,300 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,965 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,630 |
| European Geography By Letter - M | 0 | - | 4.69 | 131,970 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,800 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,325 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,543 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,228 |
| Europe Map Quiz | 0 | - | 5.00 | 4,779,527 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,441 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,093 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,394 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,361 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,160 |
| Four Letter European Geography #1 | 0 | - | 4.41 | 28,402 |
| Four Letter European Geography #2 | 0 | - | 4.54 | 20,629 |
| Capitals of French Regions | 0 | - | 4.45 | 16,150 |
| Regions of France | 0 | - | 4.70 | 121,685 |
| France Immigration by Country | 0 | - | 4.70 | 76,816 |
| Famous Germans | 0 | - | 4.50 | 55,647 |
| German Groups of Things | 0 | - | 4.47 | 38,585 |
| Capitals of German States | 0 | - | 4.74 | 29,032 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,476 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,298 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,032 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,922 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,401 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,610 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,375 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,625 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,536 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,766 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 280,241 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,004 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,654 |
| Australian Capitals | 0 | - | 4.92 | 62,800 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,225 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,730 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,038 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,849 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,546 |
| European Geography By Letter - I | 0 | - | 4.09 | 96,245 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,890 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,305 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,380 |
| European Physical Geography | 0 | - | 4.26 | 33,570 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,822 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,671 |
| European Geography A-Z | 0 | - | 4.29 | 49,426 |
| European Geographic Groups of Four | 0 | - | 4.60 | 19,438 |
| Geography of Russia | 0 | - | 4.57 | 21,572 |
| History of Austria | 0 | - | 4.70 | 17,946 |
| Austria... or Australia? | 0 | - | 4.68 | 104,640 |
| Famous French People | 0 | - | 4.07 | 35,979 |
| Geography of the French Empire | 0 | - | 4.45 | 27,193 |
| Word Chain - France | 0 | - | 4.38 | 42,895 |
| The French Revolution | 0 | - | 4.47 | 24,108 |
| History of France | 0 | - | 4.61 | 57,445 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,536 |
| Ancient Greek Trivia | 0 | - | 4.62 | 67,164 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,997 |
| Most-Mentioned Characters in the Iliad | 0 | - | 4.81 | 20,909 |
| Figures from Greek Mythology | 0 | - | 4.91 | 188,288 |
| Italian Foods | 0 | - | 4.30 | 73,106 |
| Countries Italy Declared War On | 0 | - | 4.75 | 43,551 |
| The Mafia Quiz | 0 | - | 4.46 | 23,404 |
| Byzantine History | 0 | - | 4.91 | 28,983 |
| Byzantine Emperors | 0 | - | 4.92 | 14,479 |
| History of The Netherlands | 0 | - | 4.46 | 17,523 |
| The Vikings! | 0 | - | 4.46 | 28,388 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,302 |
| The Portuguese Empire | 0 | - | 4.58 | 12,094 |
| Canary Islands | 0 | - | 4.62 | 17,508 |
| Real Madrid 2010s Starting XI | 0 | - | 4.90 | 68,484 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,944 |
| American to British Word Translation | 0 | - | 4.14 | 139,514 |
| British Spellings | 0 | - | 4.06 | 99,547 |
| British Groups of Things | 0 | - | 4.25 | 82,968 |
| British Acronyms | 0 | - | 4.40 | 45,898 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,012 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,082 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,251 |
| British Monopoly Board | 0 | - | 4.52 | 41,231 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,417 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,051 |
| Geography of Scotland | 0 | - | 4.63 | 21,704 |
| Champions League Top 4 | 0 | - | 4.77 | 138,087 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,949 |
| Asia Map Quiz | 0 | - | 4.99 | 922,718 |
| Afghanistan True or False? | 0 | - | 4.54 | 25,461 |
| Africa Map Quiz | 0 | - | 5.00 | 2,125,552 |
| Pasta... or Composer? | 0 | - | 4.63 | 26,797 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,198 |
| Australian States and Territories | 0 | - | 4.96 | 142,562 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,431 |
| Australia Map Quiz | 0 | - | 4.95 | 345,703 |
| Flags of North and South America | 0 | - | 4.99 | 375,685 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,852 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,617 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,370 |
| South America Map Quiz | 0 | - | 5.00 | 1,553,862 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,702 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,028,534 |
| North America Map Quiz | 0 | - | 4.98 | 250,538 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,913 |
| Canada Provinces and Territories | 0 | - | 5.00 | 345,008 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 642,981 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,445 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,356 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,819 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 43,066 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,138 |
| European Countries Ending in "IA" | 0 | - | 4.96 | 68,808 |
| Sahel Countries on a Map | 0 | - | 4.99 | 21,436 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,201 |
