| Independence from Whom | 0 | - | 4.99 | 211,487 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,835 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,421 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,065 |
| Recently Independent Countries | 0 | - | 4.98 | 159,109 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,735 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,961 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,595 |
| Countries by Former Name | 0 | - | 4.99 | 125,005 |
| Historical City to Country | 0 | - | 4.84 | 78,472 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,692,692 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,384,982 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,482 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,168 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,137 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,631 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,206 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,485 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,156 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,335 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,497 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,476 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,596 |
| Landlocked Countries | 0 | - | 4.99 | 419,611 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,761,201 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,669 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,653 |
| National Founders | 0 | - | 4.40 | 83,813 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,752 |
| Battle to Country | 0 | - | 4.91 | 53,235 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,576 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,788 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,574 |
| Island Countries | 0 | - | 4.99 | 710,044 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,273 |
| Himalayan Countries | 0 | - | 4.95 | 137,714 |
| Andean Countries | 0 | - | 4.95 | 84,075 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,317 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,836 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,945 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,431 |
| Danube Countries | 0 | - | 4.97 | 71,729 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,653 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,124 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,768 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,846 |
| European Landlocked Countries | 0 | - | 4.99 | 146,852 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,222 |
| Countries with the Most Species | 0 | - | 4.99 | 102,991 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,382 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,452 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,614 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,358 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,033 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,428 |
| Countries in the Alps | 0 | - | 4.87 | 117,800 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,209 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,512 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,460 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,180 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,182 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,767 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,363 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,255 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,014 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,620 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,519 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,367 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,982 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,248 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,270 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,321 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,105 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,614 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,641 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,679 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,413 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,035 |
| Largest Countries By Category | 0 | - | 4.97 | 157,768 |
| Countries by Countries | 0 | - | 4.96 | 62,916 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,359 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,377,256 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,178 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,397 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,799 |
| Northernmost Countries | 0 | - | 4.99 | 360,798 |
| Countries of South America | 0 | - | 5.00 | 923,888 |
| Countries of Oceania | 0 | - | 5.00 | 1,052,438 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,868,730 |
| "Land" Countries | 0 | - | 4.98 | 335,957 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,171 |
| Countries by Independence Day | 0 | - | 4.61 | 52,724 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,582 |
| Former Countries by Capital | 0 | - | 4.45 | 127,412 |
| Former Countries | 0 | - | 4.75 | 133,719 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,863 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,125 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,527 |
| Communist Countries in History | 0 | - | 4.63 | 495,271 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,444,314 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,973 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,221 |
| Countries with Megacities | 0 | - | 4.99 | 262,177 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,065 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,101 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,367 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,137 |
| Countries by Official Language | 0 | - | 4.95 | 194,772 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,709 |
| Countries in their Native Language | 0 | - | 4.99 | 198,318 |
| Subdivisions by Country | 0 | - | 4.86 | 50,316 |
| Megadiverse Countries | 0 | - | 4.96 | 134,814 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,644 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,215 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,206 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,789 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,035 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,791 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,883 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,522 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,011 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,143 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,752 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,027 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,823 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,189 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,366 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,381 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,609 |
| World Map Quiz | 0 | - | 4.81 | 64,703 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,105 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,211 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,398 |
| Country Picture Puzzle Game #1 | 0 | - | 4.86 | 86,409 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,640 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,008 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,735 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,540 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,601 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,752 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,891 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,307 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,344 |
| Widest Countries East to West | 0 | - | 4.92 | 129,434 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,402 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,040 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,022 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,572 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,307 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,623 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,271 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,739 |
| Political Movements by Country | 0 | - | 4.46 | 72,497 |
| Countries with Double Letters | 0 | - | 4.97 | 95,205 |
| Countries that End in N | 0 | - | 4.95 | 170,210 |
| Countries with Five Letters | 0 | - | 4.96 | 280,880 |
| Countries with Six Letters | 0 | - | 4.94 | 212,648 |
| Countries with W | 0 | - | 4.97 | 159,598 |
| Countries with Z | 0 | - | 4.98 | 290,166 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,844 |
| Countries That End in U | 0 | - | 4.95 | 120,449 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,862 |
| Countries that End in O | 0 | - | 4.92 | 159,239 |
| Countries that End in R | 0 | - | 4.87 | 118,761 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,538 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,454 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,199 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,144 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,739 |
| Countries That End in Y | 0 | - | 4.91 | 185,673 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,372 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,506 |
| Countries that End in I | 0 | - | 4.94 | 134,905 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,363 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,615 |
| Countries That End in NIA | 0 | - | 4.92 | 109,555 |
| Countries That End in BIA | 0 | - | 4.93 | 148,904 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,800 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,125 |
| Countries That End in RIA | 0 | - | 4.93 | 126,581 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,713 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,889 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,320 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,699 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,225 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,375 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,731 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,303 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,212 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,233 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,628 |
| Countries that End in L | 0 | - | 4.94 | 156,585 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,344 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,165 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,873 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,770 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,815 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,914 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,275 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,709 |
