| Federal Subjects of Russia | 0 | - | 4.95 | 148,037 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,337 |
| Official European Union Languages | 0 | - | 4.97 | 238,941 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,144 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,619 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 214,618 |
| Countries That Border Russia | 0 | - | 4.98 | 462,854 |
| Russia Country Quiz | 0 | - | 4.83 | 114,707 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,095 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,989 |
| Slavic Languages | 0 | - | 4.68 | 54,469 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,115 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,363 |
| History of Russia Quiz | 0 | - | 4.47 | 31,952 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,916 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,811 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,314 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,543 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,307 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,094 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,481 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,202 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,244 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,657 |
| Countries where Arabic is an Official Language | 0 | - | 4.85 | 72,595 |
| Top African Languages on a Map | 0 | - | 4.92 | 74,469 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,431 |
| Celtic Nations | 0 | - | 4.69 | 46,997 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 38,079 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 90,131 |
| Champions League Winners | 0 | - | 4.92 | 1,009,992 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 97,941 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,395 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 86,825 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,322 |
| Famous Russians | 0 | - | 4.16 | 23,868 |
| Geography of Russia | 0 | - | 4.57 | 21,555 |
| States of Germany | 0 | - | 4.95 | 153,232 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,295 |
| Regions of Italy | 0 | - | 4.92 | 76,251 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,434 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,427 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,423 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,949 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,757 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,590 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,945 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,394 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,647 |
| Croatia Country Quiz | 0 | - | 4.83 | 43,472 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,417 |
| Departments of France | 0 | - | 4.93 | 54,479 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,618 |
| England or Wales? | 0 | - | 4.94 | 45,804 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,017 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,647 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,675 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,884 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,634 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,647 |
| Countries that Border Poland | 0 | - | 4.99 | 172,620 |
| Countries that Beat Russia | 0 | - | 4.81 | 83,069 |
| Countries that Border Hungary | 0 | - | 4.98 | 104,437 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,928 |
| Moldova Country Quiz | 0 | - | 4.82 | 30,885 |
| Countries Bordering Serbia | 0 | - | 4.96 | 92,674 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,859 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,367 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,207 |
| The Trojan War | 0 | - | 4.83 | 39,800 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,944 |
| Name that Greek Letter | 0 | - | 4.93 | 324,187 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,261 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,665 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,656 |
| Roman Emperors | 0 | - | 4.95 | 120,409 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,516 |
| Languages of Spain | 0 | - | 4.36 | 23,352 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 220,855 |
| Word Chain - Russia | 0 | - | 4.33 | 15,771 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,779 |
| Russian History A-Z | 0 | - | 4.35 | 31,871 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 96,546 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,939 |
| History of Italy | 0 | - | 4.55 | 32,055 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,967 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,721 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,299 |
| Top 12 Languages Spoken in Asia | 0 | - | 4.40 | 32,583 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,988 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 120,383 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,781 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,332 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,999 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,334 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,209 |
| European Geography By Letter - R | 0 | - | 4.42 | 94,016 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,290 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,842 |
| Europe Map Quiz | 0 | - | 5.00 | 4,771,625 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,359 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,015 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,306 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,298 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,891 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,552 |
| Capitals of French Regions | 0 | - | 4.45 | 16,113 |
| Regions of France | 0 | - | 4.72 | 121,259 |
| France Immigration by Country | 0 | - | 4.70 | 76,686 |
| Famous Germans | 0 | - | 4.50 | 55,537 |
| German Groups of Things | 0 | - | 4.46 | 38,527 |
| Capitals of German States | 0 | - | 4.74 | 28,990 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,402 |
| Germany True or False? | 0 | - | 4.61 | 48,893 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,145 |
| Ancient Greek Words | 0 | - | 4.93 | 111,920 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,814 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,282 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,503 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,341 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,446 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,493 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,723 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,070 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,116 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,708 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,606 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,578 |
| Top World Languages | 0 | - | 4.92 | 824,611 |
| Official Languages of South Africa | 0 | - | 4.57 | 26,183 |
| Oceania Map Quiz | 0 | - | 4.98 | 653,439 |
| Australian Capitals | 0 | - | 4.92 | 62,756 |
| European Physical Geography | 0 | - | 4.26 | 33,542 |
| Albania Country Quiz | 0 | - | 4.54 | 39,085 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 42,290 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,022 |
| Ukraine Country Quiz | 0 | - | 4.43 | 47,800 |
| Hungary Country Quiz | 0 | - | 4.49 | 43,551 |
| Romania Country Quiz | 0 | - | 4.63 | 53,912 |
| Serbia Country Quiz | 0 | - | 4.44 | 35,094 |
| History of Austria | 0 | - | 4.70 | 17,906 |
| Geography of the French Empire | 0 | - | 4.45 | 27,156 |
| The French Revolution | 0 | - | 4.47 | 24,064 |
| France Multiple Choice | 0 | - | 4.39 | 40,774 |
| History of France | 0 | - | 4.59 | 57,279 |
| Figures from Greek Mythology | 0 | - | 4.91 | 187,749 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,060 |
| The Vikings! | 0 | - | 4.46 | 28,368 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,215 |
| The Portuguese Empire | 0 | - | 4.58 | 12,083 |
| American to British Word Translation | 0 | - | 4.14 | 139,321 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,163 |
| Champions League Top 4 | 0 | - | 4.77 | 137,319 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,772 |
| Asia Map Quiz | 0 | - | 4.99 | 919,820 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,182 |
| Africa Map Quiz | 0 | - | 5.00 | 2,121,962 |
| Countries by Official Language | 0 | - | 4.95 | 195,302 |
| Places in their Native Language #1 | 0 | - | 4.85 | 242,357 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,442 |
| Countries in their Native Language | 0 | - | 4.99 | 199,091 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,136 |
| English Words of Russian Origin | 0 | - | 4.14 | 50,981 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,952 |
| Australia Map Quiz | 0 | - | 4.95 | 345,200 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,758 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,828 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,743 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,597 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,070 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,264 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,618 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,467 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,155 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,894 |
| European Geography By Letter - K | 0 | - | 4.14 | 70,535 |
| European Geography By Letter - O | 0 | - | 4.29 | 63,015 |
| European Geography by Letter - W | 0 | - | 4.21 | 83,151 |
| Europe Geography Quiz #3 | 0 | - | 4.35 | 63,752 |
| European Geography By Letter - S #2 | 0 | - | 4.20 | 51,447 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 115,706 |
| European Geography A-Z | 0 | - | 4.29 | 49,368 |
| Country Codes of Europe | 0 | - | 3.43 | 13,753 |
| The Only European Country ... | 0 | - | 4.91 | 217,422 |
| European Countries NOT in NATO | 0 | - | 4.90 | 61,594 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,658 |
| Seas of Europe | 0 | - | 4.37 | 84,727 |
| Four Letter European Geography #1 | 0 | - | 4.40 | 28,304 |
| Slovenia Country Quiz | 0 | - | 4.55 | 30,793 |
| Poland Country Quiz | 0 | - | 4.20 | 63,425 |
| Embarrassing Chapters in Russian History | 0 | - | 3.70 | 20,325 |
| Slovakia Country Quiz | 0 | - | 4.64 | 30,763 |
| Bulgaria Country Quiz | 0 | - | 4.55 | 30,954 |
| Montenegro Country Quiz | 0 | - | 4.61 | 23,769 |
| Belarus Country Quiz | 0 | - | 4.74 | 27,392 |
| Lithuania Country Quiz | 0 | - | 4.61 | 31,682 |
| Latvia Country Quiz | 0 | - | 4.77 | 32,089 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,646 |
| Austria... or Australia? | 0 | - | 4.68 | 104,507 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 18,091 |
