| Independence from Whom | 0 | - | 4.99 | 211,483 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,830 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,419 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,064 |
| Recently Independent Countries | 0 | - | 4.98 | 159,101 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,723 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,945 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,581 |
| Countries by Former Name | 0 | - | 4.99 | 124,995 |
| Historical City to Country | 0 | - | 4.84 | 78,470 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,692,434 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,382,017 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,479 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,167 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,131 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,626 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,202 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,484 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,156 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,332 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,492 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,475 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,589 |
| Landlocked Countries | 0 | - | 4.99 | 419,572 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,760,975 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,666 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,650 |
| National Founders | 0 | - | 4.40 | 83,812 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,749 |
| Battle to Country | 0 | - | 4.91 | 53,232 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,540 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,770 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,522 |
| Island Countries | 0 | - | 4.99 | 710,035 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,261 |
| Himalayan Countries | 0 | - | 4.95 | 137,705 |
| Andean Countries | 0 | - | 4.95 | 84,073 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,311 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,829 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,939 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,429 |
| Danube Countries | 0 | - | 4.97 | 71,728 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,651 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,123 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,764 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,841 |
| European Landlocked Countries | 0 | - | 4.99 | 146,848 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,215 |
| Countries with the Most Species | 0 | - | 4.99 | 102,990 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,376 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,452 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,611 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,357 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,029 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,424 |
| Countries in the Alps | 0 | - | 4.87 | 117,794 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,205 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,504 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,458 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,152 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,172 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,763 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,357 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,250 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,012 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,612 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,517 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,367 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,978 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,244 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,265 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,314 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,101 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,611 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,637 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,657 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,392 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,034 |
| Largest Countries By Category | 0 | - | 4.97 | 157,759 |
| Countries by Countries | 0 | - | 4.96 | 62,913 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,350 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,377,171 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,176 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,393 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,770 |
| Northernmost Countries | 0 | - | 4.99 | 360,781 |
| Countries of South America | 0 | - | 5.00 | 923,842 |
| Countries of Oceania | 0 | - | 5.00 | 1,052,360 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,868,633 |
| "Land" Countries | 0 | - | 4.98 | 335,950 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 426,162 |
| Countries by Independence Day | 0 | - | 4.61 | 52,724 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,580 |
| Former Countries by Capital | 0 | - | 4.45 | 127,408 |
| Former Countries | 0 | - | 4.75 | 133,716 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,855 |
| Asian Countries with the Most Christians | 0 | - | 4.85 | 97,122 |
| African Countries with the Most Christians | 0 | - | 4.94 | 75,524 |
| Communist Countries in History | 0 | - | 4.63 | 495,253 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,444,244 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,957 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,208 |
| Countries with Megacities | 0 | - | 4.99 | 262,095 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,058 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,094 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,355 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,130 |
| Countries by Official Language | 0 | - | 4.95 | 194,766 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,699 |
| Countries in their Native Language | 0 | - | 4.99 | 198,312 |
| Subdivisions by Country | 0 | - | 4.86 | 50,316 |
| Megadiverse Countries | 0 | - | 4.96 | 134,813 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,636 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,213 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,204 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,789 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,033 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,784 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,881 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,521 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,009 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,131 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,750 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,026 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,818 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,186 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,366 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,373 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,606 |
| World Map Quiz | 0 | - | 4.81 | 64,699 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,100 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,203 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,392 |
| Country Picture Puzzle Game #1 | 0 | - | 4.86 | 86,407 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,638 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,007 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,726 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,528 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,600 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,745 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,888 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,305 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,340 |
| Widest Countries East to West | 0 | - | 4.92 | 129,430 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,401 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,032 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,019 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,568 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,299 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,619 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,267 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,738 |
| Political Movements by Country | 0 | - | 4.46 | 72,496 |
| Countries with Double Letters | 0 | - | 4.97 | 95,192 |
| Countries that End in N | 0 | - | 4.95 | 170,200 |
| Countries with Five Letters | 0 | - | 4.96 | 280,857 |
| Countries with Six Letters | 0 | - | 4.94 | 212,636 |
| Countries with W | 0 | - | 4.97 | 159,592 |
| Countries with Z | 0 | - | 4.98 | 290,091 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,833 |
| Countries That End in U | 0 | - | 4.95 | 120,447 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,852 |
| Countries that End in O | 0 | - | 4.92 | 159,235 |
| Countries that End in R | 0 | - | 4.87 | 118,759 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,537 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,449 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,194 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,137 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,738 |
| Countries That End in Y | 0 | - | 4.91 | 185,672 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,355 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,502 |
| Countries that End in I | 0 | - | 4.94 | 134,905 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,317 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,612 |
| Countries That End in NIA | 0 | - | 4.92 | 109,552 |
| Countries That End in BIA | 0 | - | 4.93 | 148,899 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,796 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,122 |
| Countries That End in RIA | 0 | - | 4.93 | 126,578 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,707 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,873 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,309 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,693 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,223 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,370 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,729 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,298 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,206 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,232 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,623 |
| Countries that End in L | 0 | - | 4.94 | 156,583 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,315 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,165 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,871 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,766 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,814 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,907 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,270 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,708 |
