| Countries of the World Quiz | 0 | - | 5.00 | 47,058,590 |
| Landlocked Countries | 0 | - | 4.99 | 415,364 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,731,003 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,842 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,807 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,799 |
| Island Countries | 0 | - | 4.99 | 708,326 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,303 |
| Himalayan Countries | 0 | - | 4.95 | 135,978 |
| Andean Countries | 0 | - | 4.94 | 83,172 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,492 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,631 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,186 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,831 |
| Danube Countries | 0 | - | 4.97 | 71,267 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,999 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,714 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,870 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,816 |
| European Landlocked Countries | 0 | - | 4.99 | 145,966 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,522 |
| Countries with the Most Species | 0 | - | 4.99 | 95,348 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,650 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,270 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,440 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,068 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,718 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,076 |
| Countries in the Alps | 0 | - | 4.86 | 117,125 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,760 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,597 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,160 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,590 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,380 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,141 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,803 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,898 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,694 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,208 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,273 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,139 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,620 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,880 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,889 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,461 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,800 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,350 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,029 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,270 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,193 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,733 |
| Largest Countries By Category | 0 | - | 4.97 | 157,032 |
| Countries by Countries | 0 | - | 4.96 | 62,444 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,367,095 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,671 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,027 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,377 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,948 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,721 |
| Northernmost Countries | 0 | - | 4.99 | 358,698 |
| Countries of South America | 0 | - | 5.00 | 917,832 |
| Countries of Oceania | 0 | - | 5.00 | 1,044,225 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,854,385 |
| "Land" Countries | 0 | - | 4.98 | 334,101 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,437,952 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,385 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,908 |
| Countries with Megacities | 0 | - | 4.99 | 248,197 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,800 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,358 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,181 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,297 |
| Countries by Official Language | 0 | - | 4.95 | 193,188 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,727 |
| Countries in their Native Language | 0 | - | 4.99 | 197,025 |
| Independence from Whom | 0 | - | 4.99 | 210,164 |
| Subdivisions by Country | 0 | - | 4.86 | 50,149 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,067 |
| Megadiverse Countries | 0 | - | 4.96 | 134,451 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,185 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,012 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,546 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,907 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,883 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,128 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,329 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,450 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,302 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,787 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 75,927 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,519 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,623 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,584 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,797 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,123 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,141 |
| World Map Quiz | 0 | - | 4.81 | 63,799 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,652 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,584 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,783 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,520 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,245 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,346 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,115 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,314 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,507 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,079 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,532 |
| Widest Countries East to West | 0 | - | 4.92 | 129,028 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,285 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,489 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,655 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,866 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,833 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,231 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 76,690 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,641 |
| Countries with Double Letters | 0 | - | 4.96 | 93,695 |
| Countries that End in N | 0 | - | 4.94 | 157,153 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,047 |
| Countries with Six Letters | 0 | - | 4.93 | 210,720 |
| Countries with W | 0 | - | 4.97 | 158,427 |
| Countries with Z | 0 | - | 4.98 | 288,257 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,770 |
| Countries That End in U | 0 | - | 4.95 | 119,617 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,888 |
| Countries that End in O | 0 | - | 4.92 | 158,662 |
| Countries that End in R | 0 | - | 4.87 | 118,379 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,938 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,428 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,567 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,658 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,202 |
| Countries That End in Y | 0 | - | 4.90 | 185,292 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,630 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,906 |
| Countries that End in I | 0 | - | 4.94 | 134,546 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,484 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,304 |
| Countries That End in NIA | 0 | - | 4.92 | 109,125 |
| Countries That End in BIA | 0 | - | 4.92 | 147,854 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,269 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,637 |
| Countries That End in RIA | 0 | - | 4.93 | 126,203 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,187 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,744 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,691 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,042 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,591 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,030 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,288 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,804 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,694 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,901 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,353 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,000 |
| Countries that End in L | 0 | - | 4.94 | 156,163 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,176 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,022 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,626 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,463 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,534 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,997 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,642 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 141,765 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,660 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,043 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,931 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,821 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,245 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,469 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,425 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,808,227 |
| One Border Countries | 0 | - | 4.98 | 465,707 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,597,089 |
| Majority Muslim Countries | 0 | - | 4.98 | 370,915 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,091,976 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 447,471 |
| Countries with the Most Borders | 0 | - | 4.97 | 386,619 |
| Countries of Africa | 0 | - | 5.00 | 2,515,463 |
| Countries with Four Letters | 0 | - | 4.99 | 419,557 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,158 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,581 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,157 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,631 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,958 |
| Countries by National Anthem | 0 | - | 4.93 | 71,076 |
| NATO Countries | 0 | - | 4.98 | 277,266 |
| EU Countries Quiz | 0 | - | 4.99 | 270,937 |
| Recently Independent Countries | 0 | - | 4.98 | 158,210 |
| French-Speaking Countries | 0 | - | 4.85 | 269,294 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,451 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,557 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,767 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,500 |
| German-Speaking Countries | 0 | - | 4.89 | 123,620 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,896 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,541 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,847 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,614 |
