| Independence from Whom | 0 | - | 4.99 | 213,307 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,600 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,907 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,228 |
| Countries by Founding Story | 0 | - | 4.95 | 77,885 |
| Recently Independent Countries | 0 | - | 4.98 | 160,460 |
| Countries of the World in 1900 | 0 | - | 4.89 | 86,110 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 196,980 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 152,354 |
| Countries by Former Name | 0 | - | 4.99 | 125,926 |
| Historical City to Country | 0 | - | 4.85 | 79,081 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,941,041 |
| Landlocked Countries | 0 | - | 4.99 | 426,888 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,809,701 |
| Most Populous Countries by Year | 0 | - | 4.83 | 111,548 |
| First Countries to Reach 5 Million People | 0 | - | 4.93 | 135,971 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,589 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 93,257 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,559 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,910 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,832 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,737 |
| Himalayan Countries | 0 | - | 4.93 | 140,660 |
| Andean Countries | 0 | - | 4.94 | 85,724 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,843 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,376 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,398 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,630 |
| Danube Countries | 0 | - | 4.97 | 72,510 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,734 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,933 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,359 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,817 |
| European Landlocked Countries | 0 | - | 4.99 | 147,701 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,470 |
| Countries with the Most Species | 0 | - | 4.99 | 103,625 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,572 |
| Countries Settled by Vikings | 0 | - | 4.92 | 122,145 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,802 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,934 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,899 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,655 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,102 |
| Countries in the Alps | 0 | - | 4.87 | 118,916 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,894 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,053 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,035 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,132 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,087 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,353 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,528 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,962 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,491 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,280 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,933 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,810 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,637 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,888 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,986 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,067 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,693 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 76,091 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,790 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,128 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,382 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,586 |
| Largest Countries By Category | 0 | - | 4.97 | 159,016 |
| Countries by Countries | 0 | - | 4.97 | 63,765 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,377 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,715 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,437 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,654 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,698 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,694 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,948 |
| All Countries by Population With a Map | 0 | - | 4.98 | 111,295 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,505 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,191 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,230 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,947 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,144 |
| Island Countries | 0 | - | 4.99 | 712,861 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,714 |
| Northernmost Countries | 0 | - | 4.99 | 364,422 |
| Countries of South America | 0 | - | 5.00 | 933,731 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,781 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,891,769 |
| "Land" Countries | 0 | - | 4.98 | 338,825 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 174,317 |
| Countries by Independence Day | 0 | - | 4.62 | 52,870 |
| Former Countries by Capital | 0 | - | 4.45 | 127,865 |
| Former Countries | 0 | - | 4.77 | 134,298 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,395,974 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,564 |
| Battle to Country | 0 | - | 4.91 | 54,067 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,258 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,403 |
| Countries with Megacities | 0 | - | 4.99 | 267,618 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,049 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,276 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,387 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,381 |
| Countries by Official Language | 0 | - | 4.95 | 196,154 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,844 |
| Countries in their Native Language | 0 | - | 4.99 | 199,887 |
| Subdivisions by Country | 0 | - | 4.87 | 50,650 |
| Megadiverse Countries | 0 | - | 4.96 | 147,808 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,075 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,565 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,772 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,244 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,407 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,604 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,141 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,280 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,695 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,457 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,484 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,195 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,617 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,940 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,626 |
| World Map Quiz | 0 | - | 4.81 | 65,871 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,703 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,773 |
| Countries by Road Signs | 0 | - | 4.98 | 54,416 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,431 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,186 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,650 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,812 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,518 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,626 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,815 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,743 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,894 |
| Widest Countries East to West | 0 | - | 4.92 | 130,799 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,623 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,350 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,545 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,128 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,067 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,577 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,525 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,916 |
| Countries with Double Letters | 0 | - | 4.96 | 97,482 |
| Countries that End in N | 0 | - | 4.95 | 172,522 |
| Countries with Five Letters | 0 | - | 4.96 | 284,470 |
| Countries with Six Letters | 0 | - | 4.94 | 214,838 |
| Countries with W | 0 | - | 4.96 | 161,220 |
| Countries with Z | 0 | - | 4.98 | 292,862 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,581 |
| Countries That End in U | 0 | - | 4.95 | 121,339 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,330 |
| Countries that End in O | 0 | - | 4.92 | 160,333 |
| Countries that End in R | 0 | - | 4.87 | 119,257 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 156,028 |
| Countries Ending in "IA" | 0 | - | 4.99 | 210,065 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 183,375 |
| Countries by Last Two Letters | 0 | - | 4.85 | 136,090 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,553 |
| Countries That End in Y | 0 | - | 4.91 | 186,149 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 199,071 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,376 |
| Countries that End in I | 0 | - | 4.94 | 135,388 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 185,118 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,117 |
| Countries That End in NIA | 0 | - | 4.92 | 110,127 |
| Countries That End in BIA | 0 | - | 4.93 | 149,693 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,882 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,857 |
| Countries That End in RIA | 0 | - | 4.93 | 127,117 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,499 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,845 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,324 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,779 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,336 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,882 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,411 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,582 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 126,007 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,706 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,854 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,548 |
| Countries that End in L | 0 | - | 4.94 | 157,211 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,387 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,368 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,838 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,133 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,521 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,588 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,255 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,496 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,375 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,125 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,293 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,282 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,964 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,867 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,332 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,455,449 |
