| Federal Subjects of Russia | 0 | - | 4.95 | 149,341 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 532,290 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.83 | 87,980 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,666 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,479 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,915 |
| History of Russia Quiz | 0 | - | 4.47 | 31,999 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,678 |
| Official European Union Languages | 0 | - | 4.97 | 239,682 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,580 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,654 |
| Geography of Russia | 0 | - | 4.57 | 21,594 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,738 |
| Famous Russians | 0 | - | 4.16 | 23,906 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 83,229 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,285 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 42,040 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,495 |
| Celtic Nations | 0 | - | 4.61 | 47,085 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,922 |
| European Geography By Letter - B #1 | 0 | - | 4.62 | 121,201 |
| European Geography By Letter - C | 0 | - | 4.43 | 123,509 |
| European Geography By Letter - D | 0 | - | 4.50 | 110,530 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,813 |
| European Geography By Letter - M | 0 | - | 4.69 | 132,217 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,925 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,436 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,657 |
| European Geography By Letter - T | 0 | - | 4.41 | 83,373 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 101,267 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,556 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 175,507 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 90,109 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,726 |
| Slavic Countries | 0 | - | 4.96 | 112,316 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,172 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,307 |
| Famous Germans | 0 | - | 4.50 | 55,765 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,673 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,413 |
| Famous Italians by Clue | 0 | - | 4.45 | 90,322 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 361,221 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,767 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,718 |
| Word Chain - Russia | 0 | - | 4.33 | 15,792 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,429 |
| States of Germany | 0 | - | 4.95 | 154,333 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,652 |
| Regions of Italy | 0 | - | 4.92 | 76,967 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,763 |
| Regions of Spain Quiz | 0 | - | 4.90 | 115,237 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,708 |
| Champions League Winners | 0 | - | 4.92 | 1,015,331 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,932 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,734 |
| Countries That Border Russia | 0 | - | 4.98 | 464,345 |
| United Kingdom A-Z | 0 | - | 4.51 | 88,340 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,834 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,875 |
| European Geography By Letter - F | 0 | - | 4.15 | 94,190 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,975 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,690 |
| European Geography By Letter - I | 0 | - | 4.07 | 96,370 |
| European Geography By Letter - K | 0 | - | 4.15 | 70,996 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,414 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,457 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,748 |
| European Geography A-Z | 0 | - | 4.29 | 49,471 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 235,639 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 278,786 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,773 |
| Russia Country Quiz | 0 | - | 4.83 | 115,271 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,711 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,561 |
| Famous French People | 0 | - | 4.07 | 36,074 |
| Departments of France | 0 | - | 4.93 | 55,064 |
| The Mafia Quiz | 0 | - | 4.46 | 23,432 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,727 |
| History of The Netherlands | 0 | - | 4.46 | 17,545 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 32,094 |
| England or Wales? | 0 | - | 4.94 | 45,943 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,979 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,718 |
| Word Scramble - European Countries | 0 | - | 4.73 | 142,275 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 120,759 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,825 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,899 |
| Slavic Languages | 0 | - | 4.68 | 54,672 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,976 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 28,030 |
| Moldova Country Quiz | 0 | - | 4.82 | 31,014 |
| French Geography Quiz #1 | 0 | - | 4.89 | 35,064 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,667 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,139 |
| France A-Z | 0 | - | 4.16 | 38,326 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 651,547 |
| Name that Greek Letter | 0 | - | 4.93 | 324,883 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,727 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,613 |
| Switzerland A-Z | 0 | - | 4.45 | 25,756 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,782 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,357 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,864 |
| Russian History A-Z | 0 | - | 4.35 | 32,181 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,785 |
| Ancient Greece A-Z | 0 | - | 4.60 | 23,232 |
| The Trojan War | 0 | - | 4.83 | 39,966 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,870 |
| Famous Irish People | 0 | - | 4.05 | 46,062 |
| History of Italy | 0 | - | 4.55 | 32,138 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,311 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,561 |
| Roman Emperors | 0 | - | 4.95 | 121,101 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,810 |
| Famous Nordic People | 0 | - | 4.34 | 20,289 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,644 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,413 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,573 |
| People on Money - England | 0 | - | 4.29 | 16,643 |
| London A-Z | 0 | - | 4.10 | 40,873 |
| Zone 1 London Underground Stations - With a Map | 0 | - | 4.90 | 52,757 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 42,962 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,563 |
| Africa A-Z | 0 | - | 4.57 | 46,760 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,263 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,503 |
| Europe Map Quiz | 0 | - | 5.00 | 4,785,772 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,502 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,160 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,441 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,409 |
| Capitals of French Regions | 0 | - | 4.45 | 16,172 |
| Regions of France | 0 | - | 4.70 | 121,984 |
| France Immigration by Country | 0 | - | 4.70 | 76,902 |
| German Groups of Things | 0 | - | 4.47 | 38,623 |
| Capitals of German States | 0 | - | 4.74 | 29,064 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,529 |
| Germany True or False? | 0 | - | 4.61 | 49,004 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,434 |
| Olympian Gods Quiz | 0 | - | 4.96 | 503,536 |
| Ancient Greek Words | 0 | - | 4.93 | 112,396 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,713 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,398 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,764 |
| Name Every Beatles Song | 0 | - | 4.97 | 238,201 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,730 |
| Famous Scottish People | 0 | - | 4.22 | 18,437 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,408 |
| Asian Geography by Letter - H | 0 | - | 4.50 | 66,022 |
| Asian Geography By Letter - M | 0 | - | 4.48 | 61,621 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 58,158 |
| Asian Geography by Letter - T | 0 | - | 4.52 | 57,617 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 43,278 |
| Asian Geography By Letter - O | 0 | - | 4.66 | 32,250 |
| Middle East A-Z | 0 | - | 4.47 | 46,232 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,324,862 |
| Oceania Map Quiz | 0 | - | 4.98 | 658,850 |
| Australian Capitals | 0 | - | 4.92 | 62,826 |
| Canada A-Z | 0 | - | 4.73 | 32,958 |
| European Physical Geography | 0 | - | 4.26 | 33,588 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,438 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,112 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,965 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,755 |
| Romania Country Quiz | 0 | - | 4.63 | 54,105 |
| History of Austria | 0 | - | 4.70 | 17,969 |
| Geography of the French Empire | 0 | - | 4.45 | 27,210 |
| The French Revolution | 0 | - | 4.47 | 24,138 |
| France Multiple Choice | 0 | - | 4.39 | 40,834 |
| History of France | 0 | - | 4.61 | 57,570 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,556 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 439,577 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,487 |
| The Vikings! | 0 | - | 4.46 | 28,400 |
| Sweden Immigration by Country | 0 | - | 4.53 | 56,363 |
| The Portuguese Empire | 0 | - | 4.58 | 12,100 |
| American to British Word Translation | 0 | - | 4.14 | 139,649 |
| Languages of the United Kingdom | 0 | - | 4.14 | 41,046 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,799 |
| Champions League Top 4 | 0 | - | 4.78 | 138,845 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,452,112 |
| Asia Map Quiz | 0 | - | 4.99 | 924,516 |
| A Quiz About Islam | 0 | - | 4.32 | 48,604 |
| Countries That Don't Recognize Israel | 0 | - | 4.68 | 35,151 |
| Africa Map Quiz | 0 | - | 5.00 | 2,127,846 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 158,439 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.96 | 51,408 |
| Australia Map Quiz | 0 | - | 4.95 | 346,056 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,878 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,298 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,620 |
| United States Map Quiz | 0 | - | 4.98 | 4,170,462 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 749,498 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,807 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,886 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,630 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 366,090 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,872 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,994 |
| Country Codes of Europe | 0 | - | 3.43 | 13,805 |
