| Warsaw Pact Countries | 0 | - | 4.83 | 84,321 |
| Recently Independent Countries | 0 | - | 4.98 | 158,221 |
| Independence from Whom | 0 | - | 4.99 | 210,175 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,073 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,132 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,340 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,886 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,720 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,441 |
| Countries by Former Name | 0 | - | 4.99 | 124,524 |
| Historical City to Country | 0 | - | 4.84 | 78,241 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,062,899 |
| Landlocked Countries | 0 | - | 4.99 | 415,424 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,597 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,549 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,440 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,808 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,697 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,955 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,419 |
| Former Capitals | 0 | - | 4.88 | 71,224 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,003 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,020 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,003 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,731,450 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,797 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,326 |
| Himalayan Countries | 0 | - | 4.95 | 136,000 |
| Andean Countries | 0 | - | 4.94 | 83,176 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,503 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,640 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,189 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,837 |
| Danube Countries | 0 | - | 4.97 | 71,271 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,005 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,717 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,883 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,828 |
| European Landlocked Countries | 0 | - | 4.99 | 145,974 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,534 |
| Countries with the Most Species | 0 | - | 4.99 | 95,350 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,659 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,272 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,442 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,071 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,719 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,083 |
| Countries in the Alps | 0 | - | 4.86 | 117,135 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,766 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,610 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,162 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,596 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,383 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,146 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,810 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,901 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,697 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,208 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,277 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,142 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,623 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,885 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,897 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,478 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,801 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,350 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,040 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,306 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,214 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,735 |
| Largest Countries By Category | 0 | - | 4.97 | 157,041 |
| Countries by Countries | 0 | - | 4.96 | 62,451 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,294 |
| Battle to Country | 0 | - | 4.91 | 52,696 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,680 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,030 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,954 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,874 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,821 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,818 |
| Island Countries | 0 | - | 4.99 | 708,352 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,367,262 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,800 |
| Northernmost Countries | 0 | - | 4.99 | 358,736 |
| Countries of South America | 0 | - | 5.00 | 917,913 |
| Countries of Oceania | 0 | - | 5.00 | 1,044,348 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,854,580 |
| "Land" Countries | 0 | - | 4.98 | 334,113 |
| Most Populous Countries in 1950 | 0 | - | 4.63 | 85,799 |
| Countries by Independence Day | 0 | - | 4.56 | 52,641 |
| Former Countries by Capital | 0 | - | 4.45 | 127,177 |
| Former Countries | 0 | - | 4.75 | 132,874 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,258 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,438,037 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,408 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,923 |
| Countries with Megacities | 0 | - | 4.99 | 248,224 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,826 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,369 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,204 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,302 |
| Countries by Official Language | 0 | - | 4.95 | 193,201 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,741 |
| Countries in their Native Language | 0 | - | 4.99 | 197,031 |
| Subdivisions by Country | 0 | - | 4.86 | 50,151 |
| Megadiverse Countries | 0 | - | 4.96 | 134,461 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,200 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,016 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,550 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,908 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,889 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,454 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,304 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,788 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 75,937 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,523 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,627 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,586 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,800 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,125 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,155 |
| World Map Quiz | 0 | - | 4.81 | 63,809 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,678 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,593 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,793 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,529 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,254 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,359 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,120 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,321 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,512 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,082 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,533 |
| Widest Countries East to West | 0 | - | 4.92 | 129,032 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,287 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,499 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,658 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,868 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,839 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,235 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 76,723 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,643 |
| Countries with Double Letters | 0 | - | 4.96 | 93,710 |
| Countries that End in N | 0 | - | 4.94 | 157,157 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,056 |
| Countries with Six Letters | 0 | - | 4.93 | 210,728 |
| Countries with W | 0 | - | 4.97 | 158,433 |
| Countries with Z | 0 | - | 4.98 | 288,270 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,776 |
| Countries That End in U | 0 | - | 4.95 | 119,623 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,894 |
| Countries that End in O | 0 | - | 4.92 | 158,668 |
| Countries that End in R | 0 | - | 4.87 | 118,382 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,940 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,437 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,574 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,663 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,211 |
| Countries That End in Y | 0 | - | 4.90 | 185,294 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,633 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,915 |
| Countries that End in I | 0 | - | 4.94 | 134,549 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,492 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,311 |
| Countries That End in NIA | 0 | - | 4.92 | 109,128 |
| Countries That End in BIA | 0 | - | 4.92 | 147,861 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,273 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,642 |
| Countries That End in RIA | 0 | - | 4.93 | 126,205 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,194 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,757 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,697 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,046 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,599 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,035 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,293 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,812 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,698 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,905 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,358 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,008 |
| Countries that End in L | 0 | - | 4.94 | 156,169 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,213 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,023 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,630 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,467 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,535 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,016 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,652 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 141,800 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,669 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,054 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,934 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,826 |
| 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 | 62,430 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,808,456 |
| One Border Countries | 0 | - | 4.98 | 465,759 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,597,398 |
