| Busiest Airports in Europe | 0 | - | 4.91 | 140,038 |
| World's Busiest Airports | 0 | - | 4.94 | 198,360 |
| Countries with the Most Airports | 0 | - | 4.97 | 89,902 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,214,190 |
| Airport Codes Quiz #1 | 0 | - | 4.80 | 202,873 |
| Airport Codes Quiz #2 | 0 | - | 4.41 | 91,416 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 381,644 |
| Top World Languages | 0 | - | 4.91 | 766,901 |
| Busiest Airports in the United States | 0 | - | 4.56 | 131,444 |
| Places in their Native Language #1 | 0 | - | 4.85 | 231,442 |
| Places in their Native Language #2 | 0 | - | 4.89 | 119,076 |
| Cities by Airports | 0 | - | 4.51 | 85,188 |
| UNESCO World Heritage Countries | 0 | - | 4.98 | 127,576 |
| Countries with Most Tourists with Exceptions | 0 | - | 4.97 | 114,965 |
| Five Countries With the Most Tourists by Continent | 0 | - | 4.96 | 107,388 |
| Busiest Air Routes in the World | 0 | - | 4.53 | 36,587 |
| Airports Named for People #1 | 0 | - | 4.45 | 54,613 |
| Countries by Airline Passengers | 0 | - | 4.91 | 51,562 |
| World Currency Quiz | 0 | - | 4.92 | 262,551 |
| Boundary Waters | 0 | - | 4.93 | 85,266 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.87 | 32,891 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 91,076 |
| Lonely Planet Top 200 Cities | 0 | - | 4.55 | 216,066 |
| Cities with the Most International Tourists | 0 | - | 4.46 | 52,230 |
| Largest Countries with Little Tourism | 0 | - | 4.74 | 58,717 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 99,294 |
| Most Visited Countries by JetPunkers | 0 | - | 4.89 | 111,332 |
| Tourist Route of Europe | 0 | - | 4.23 | 42,319 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 381,240 |
| U.S. National Parks Map Quiz | 0 | - | 4.47 | 53,399 |
| World Geography on a Map #1 | 0 | - | 4.94 | 70,820 |
| Countries With More Than 100 Million People | 0 | - | 4.98 | 146,342 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.96 | 117,177 |
| 25 Most Photographed Cities in Europe | 0 | - | 4.35 | 96,977 |
| World Capitals Quiz | 0 | - | 5.00 | 4,796,966 |
| Sahara Desert Countries | 0 | - | 4.97 | 144,927 |
| Himalayan Countries | 0 | - | 4.95 | 121,625 |
| Andean Countries | 0 | - | 4.92 | 68,337 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 56,412 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 112,580 |
| Coffee Producing Countries | 0 | - | 4.83 | 59,608 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 59,046 |
| Danube Countries | 0 | - | 4.97 | 60,698 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 96,638 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 81,738 |
| Countries with the Best Passports | 0 | - | 4.81 | 80,122 |
| Countries with the Worst Passports | 0 | - | 4.92 | 64,199 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 137,613 |
| European Landlocked Countries | 0 | - | 4.99 | 140,856 |
| Partially Recognized Countries | 0 | - | 4.98 | 97,824 |
| Countries with the Most Species | 0 | - | 4.99 | 92,248 |
| Countries 197 to 205 | 0 | - | 4.87 | 63,245 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 46,627 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 45,725 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 52,446 |
| Countries that Use the Peso | 0 | - | 4.88 | 56,175 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.87 | 69,843 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 53,511 |
| Countries in the Alps | 0 | - | 4.86 | 110,201 |
| Countries with the Most Tourists Per Capita | 0 | - | 4.29 | 80,118 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 90,544 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 97,461 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 75,272 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 83,557 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 110,432 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 91,810 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 94,833 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 49,720 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 47,881 |
| Countries with the Most Container Port Traffic | 0 | - | 4.91 | 58,654 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 72,630 |
| Bridge and Tunnel Borders | 0 | - | 4.95 | 51,166 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.89 | 39,026 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,028 |
| Arctic Ocean Countries | 0 | - | 4.94 | 75,703 |
| Countries with the Most Grassland | 0 | - | 4.93 | 73,377 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 108,634 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 64,698 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 56,607 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 221,312 |
| World Countries - Blind Typing | 0 | - | 5.00 | 94,493 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 44,995 |
| Largest Countries By Category | 0 | - | 4.97 | 151,104 |
| Countries by Countries | 0 | - | 4.96 | 58,311 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,398,166 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 83,745 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,464,166 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 140,480 |
| Western Europe Map Quiz | 0 | - | 4.87 | 91,592 |
| Demonyms Quiz | 0 | - | 4.12 | 182,629 |
| Who Controls It? #1 | 0 | - | 4.83 | 47,100 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 197,430 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 114,987 |
| Longest International Borders | 0 | - | 4.99 | 243,438 |
| Countries with Three Borders | 0 | - | 4.96 | 34,189 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 39,240 |
| Largest Cities for each Latitude Degree | 0 | - | 5.00 | 44,523 |
| Demonym of Every Country | 0 | - | 4.92 | 54,837 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,487,409 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 359,659 |
| Island Countries Quiz | 0 | - | 4.99 | 689,967 |
| Biggest Countries by Area | 0 | - | 5.00 | 988,167 |
| Northernmost Countries | 0 | - | 4.99 | 342,310 |
| Countries of South America | 0 | - | 5.00 | 860,464 |
| Countries of Oceania | 0 | - | 5.00 | 973,004 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,726,136 |
| Airline Logos | 0 | - | 4.44 | 135,353 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,252,886 |
| Europe Map Quiz | 0 | - | 5.00 | 4,548,109 |
| All Country Flags of the World | 0 | - | 5.00 | 3,308,462 |
| Foods of the World Quiz | 0 | - | 4.21 | 45,244 |
| Analogies of Countries #1 | 0 | - | 4.88 | 66,249 |
| Pacific Ocean General Knowledge | 0 | - | 4.64 | 35,614 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,379,802 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 364,408 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 158,376 |
| Countries with Megacities | 0 | - | 4.99 | 217,482 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 186,397 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 106,077 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 126,383 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 72,993 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 269,359 |
| Biggest Cities in the World | 0 | - | 4.91 | 746,291 |
| Cities by Tourist Attraction #1 | 0 | - | 3.60 | 80,598 |
| Cities by Famous Street | 0 | - | 3.96 | 47,888 |
| Cities by Tourist Attraction #2 | 0 | - | 3.73 | 31,710 |
| Global Cities on a World Map | 0 | - | 4.94 | 97,232 |
| Northernmost Capital Cities | 0 | - | 4.98 | 102,070 |
| Most Remote Capital Cities | 0 | - | 4.90 | 48,540 |
| Capital Cities: Ports and Saints | 0 | - | 4.95 | 39,759 |
| Capitals with the Shortest Names | 0 | - | 4.96 | 100,220 |
| Same Letter Country and Capital | 0 | - | 4.99 | 138,113 |
| Countries by Capital City | 0 | - | 5.00 | 58,625 |
| Capital Cities Based on First Two Letters | 0 | - | 4.86 | 71,514 |
| Capitals of the Largest Countries by Area | 0 | - | 4.96 | 109,866 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 78,949 |
| Moved Capital Cities | 0 | - | 4.95 | 70,500 |
| Countries by Official Language | 0 | - | 4.95 | 183,772 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 281,629 |
| Countries in their Native Language | 0 | - | 4.98 | 188,579 |
| Independence from Whom | 0 | - | 4.99 | 199,552 |
| Subdivisions by Country | 0 | - | 4.86 | 48,480 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 123,525 |
| Megadiverse Countries | 0 | - | 4.96 | 130,373 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 121,855 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 120,748 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 49,287 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 155,289 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 59,404 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 86,303 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 148,921 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 80,337 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,386 |
| Countries by Sports League Revenue | 0 | - | 4.93 | 67,017 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 104,804 |
| Countries Furthest from the United States | 0 | - | 4.95 | 85,884 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,126 |
| Straight Shot to the Arctic Circle | 0 | - | 4.89 | 72,089 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 68,547 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 97,866 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 86,606 |
| Southernmost Countries of the World | 0 | - | 4.99 | 218,366 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 98,597 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 116,462 |
| Countries With the Most Languages | 0 | - | 4.89 | 188,935 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 92,455 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 88,467 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 93,483 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 58,283 |
| Tallest Countries North to South | 0 | - | 4.85 | 115,500 |
| Widest Countries East to West | 0 | - | 4.92 | 124,628 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,179 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 176,428 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,408 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 90,192 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 125,293 |
| Countries with the Most Desert | 0 | - | 4.93 | 123,232 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,010 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,528 |
| Airlines by Country | 0 | - | 4.52 | 130,539 |
| Countries with Double Letters | 0 | - | 4.96 | 81,686 |
| Countries that End in N | 0 | - | 4.93 | 145,599 |
| Countries with Five Letters Quiz | 0 | - | 4.97 | 245,501 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 200,110 |
| Countries with W | 0 | - | 4.97 | 132,981 |
| Countries with Z | 0 | - | 4.98 | 275,404 |
| Countries with Letters Missing | 0 | - | 4.97 | 176,192 |
| Countries That End in U | 0 | - | 4.95 | 113,964 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 99,970 |
| Countries that End in O | 0 | - | 4.92 | 154,167 |
| Countries that End in R | 0 | - | 4.84 | 99,813 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 151,822 |
| Countries Ending in "IA" | 0 | - | 4.99 | 197,899 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 163,173 |
| Countries by Last Two Letters | 0 | - | 4.87 | 121,751 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 135,504 |
| Countries That End in Y | 0 | - | 4.91 | 182,040 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 189,118 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.91 | 127,358 |
| Countries that End in I | 0 | - | 4.92 | 117,370 |
