| Countries of the World Quiz | 0 | - | 5.00 | 47,466,805 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,718 |
| Landlocked Countries | 0 | - | 4.99 | 420,613 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,451 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,300 |
| Countries with Glaciers | 0 | - | 4.97 | 105,426 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,560 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,661 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,768,124 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,756 |
| Himalayan Countries | 0 | - | 4.95 | 138,118 |
| Andean Countries | 0 | - | 4.95 | 84,283 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,502 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,358 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,133 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,579 |
| Danube Countries | 0 | - | 4.97 | 71,844 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,806 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,246 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,991 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,442 |
| European Landlocked Countries | 0 | - | 4.99 | 146,979 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,390 |
| Countries with the Most Species | 0 | - | 4.99 | 103,101 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,546 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,509 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,661 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,449 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,119 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,509 |
| Countries in the Alps | 0 | - | 4.87 | 117,968 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,615 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,733 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,549 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,461 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,319 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,837 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,477 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,344 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,081 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,710 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,568 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,422 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,078 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,357 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,370 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,555 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,185 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,694 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,832 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,223 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,695 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,113 |
| Largest Countries By Category | 0 | - | 4.97 | 157,941 |
| Countries by Countries | 0 | - | 4.97 | 63,021 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,475 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,221 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,516 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,514 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,373 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,074 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,286 |
| Island Countries | 0 | - | 4.99 | 710,446 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,990 |
| Northernmost Countries | 0 | - | 4.99 | 361,269 |
| Countries of South America | 0 | - | 5.00 | 925,195 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,181 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,872,170 |
| "Land" Countries | 0 | - | 4.98 | 336,547 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,379,965 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,487 |
| Countries with Megacities | 0 | - | 4.99 | 263,491 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,332 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,265 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,623 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,300 |
| Countries by Official Language | 0 | - | 4.95 | 194,954 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,972 |
| Countries in their Native Language | 0 | - | 4.99 | 198,470 |
| Independence from Whom | 0 | - | 4.99 | 211,737 |
| Subdivisions by Country | 0 | - | 4.86 | 50,365 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,004 |
| Megadiverse Countries | 0 | - | 4.96 | 134,897 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,814 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,266 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,849 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,061 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,924 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,489 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,232 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,942 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,568 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,045 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,358 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,798 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,097 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,874 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,254 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,420 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,718 |
| World Map Quiz | 0 | - | 4.81 | 64,885 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,447 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,200 |
| Countries by Founding Story | 0 | - | 4.95 | 77,232 |
| Countries by Road Signs | 0 | - | 4.98 | 53,840 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,799 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,106 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,836 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,800 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,737 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,867 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,179 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,358 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,447 |
| Widest Countries East to West | 0 | - | 4.92 | 129,515 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,418 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,183 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,066 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,645 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,420 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,711 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,314 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,767 |
| Countries with Double Letters | 0 | - | 4.97 | 95,481 |
| Countries that End in N | 0 | - | 4.95 | 170,514 |
| Countries with Five Letters | 0 | - | 4.96 | 281,499 |
| Countries with Six Letters | 0 | - | 4.94 | 212,923 |
| Countries with W | 0 | - | 4.97 | 159,822 |
| Countries with Z | 0 | - | 4.98 | 290,750 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,085 |
| Countries That End in U | 0 | - | 4.95 | 120,562 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,062 |
| Countries that End in O | 0 | - | 4.92 | 159,314 |
| Countries that End in R | 0 | - | 4.87 | 118,822 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,594 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,661 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,356 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,247 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,866 |
| Countries That End in Y | 0 | - | 4.91 | 185,745 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,561 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,642 |
| Countries that End in I | 0 | - | 4.94 | 134,976 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,757 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,689 |
| Countries That End in NIA | 0 | - | 4.92 | 109,642 |
| Countries That End in BIA | 0 | - | 4.93 | 149,001 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,897 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,228 |
| Countries That End in RIA | 0 | - | 4.93 | 126,666 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,796 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,156 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,445 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,836 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,362 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,436 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,824 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,367 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,317 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,299 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,036 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,754 |
| Countries that End in L | 0 | - | 4.94 | 156,680 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,876 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,198 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,919 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,837 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,887 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,453 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,416 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,824 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,357 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,857 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,734 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,024 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.80 | 108,678 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,645 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,770 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,866 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,377 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,829,297 |
| One Border Countries | 0 | - | 4.98 | 468,671 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,623,990 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,671 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,723 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,833 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,917 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,399 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,550 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,091 |
| Majority Muslim Countries | 0 | - | 4.98 | 374,420 |
| Countries by National Anthem | 0 | - | 4.93 | 71,246 |
| NATO Countries | 0 | - | 4.98 | 280,479 |
| EU Countries Quiz | 0 | - | 4.99 | 274,333 |
| Recently Independent Countries | 0 | - | 4.98 | 159,262 |
| French-Speaking Countries | 0 | - | 4.85 | 270,528 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,830 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,068 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 288,425 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 273,284 |
