| Countries of the World Quiz | 0 | - | 5.00 | 47,171,357 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,617 |
| Landlocked Countries | 0 | - | 4.99 | 416,763 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,385 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,077 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,844 |
| Countries with Glaciers | 0 | - | 4.97 | 104,859 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,887 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 333,984 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,409 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 122,773 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,741,221 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,985 |
| Himalayan Countries | 0 | - | 4.95 | 136,539 |
| Andean Countries | 0 | - | 4.95 | 83,509 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,773 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,035 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,441 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,039 |
| Danube Countries | 0 | - | 4.97 | 71,440 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,230 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,856 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,173 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,157 |
| European Landlocked Countries | 0 | - | 4.99 | 146,139 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,785 |
| Countries with the Most Species | 0 | - | 4.99 | 101,813 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,911 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,337 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,517 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,165 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,813 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,197 |
| Countries in the Alps | 0 | - | 4.86 | 117,343 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,914 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,926 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,260 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,751 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,834 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,262 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,998 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,999 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,814 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,335 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,371 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,206 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,735 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,008 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,018 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,736 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,904 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,435 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,260 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,060 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,596 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,838 |
| Largest Countries By Category | 0 | - | 4.97 | 157,280 |
| Countries by Countries | 0 | - | 4.96 | 62,597 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,884 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,082 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,409 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,093 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,947 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,862 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,858 |
| Island Countries | 0 | - | 4.99 | 708,858 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,043,459 |
| Northernmost Countries | 0 | - | 4.99 | 359,420 |
| Countries of South America | 0 | - | 5.00 | 919,808 |
| Countries of Oceania | 0 | - | 5.00 | 1,046,943 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,859,051 |
| "Land" Countries | 0 | - | 4.98 | 334,642 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 173,022 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,370,675 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 111,856 |
| Countries with the Most Muslims | 0 | - | 4.95 | 159,826 |
| Countries with the Most Exports | 0 | - | 4.96 | 154,741 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 189,059 |
| Countries by Oil Consumption | 0 | - | 4.96 | 119,834 |
| Largest Economies in 2050 | 0 | - | 4.90 | 110,996 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 268,603 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 103,710 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.89 | 84,093 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,316 |
| Countries with Megacities | 0 | - | 4.99 | 249,026 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,162 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,564 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,509 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,534 |
| Countries by Official Language | 0 | - | 4.95 | 194,033 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,644 |
| Countries in their Native Language | 0 | - | 4.99 | 197,652 |
| Independence from Whom | 0 | - | 4.99 | 210,830 |
| Subdivisions by Country | 0 | - | 4.86 | 50,204 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,353 |
| Megadiverse Countries | 0 | - | 4.96 | 134,547 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,850 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,079 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,633 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,949 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,455 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,228 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,612 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,554 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,376 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,808 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,219 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,582 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,690 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,648 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,864 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,207 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,599 |
| World Map Quiz | 0 | - | 4.81 | 64,106 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,421 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,708 |
| Countries by Founding Story | 0 | - | 4.95 | 76,883 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,071 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,677 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,404 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,731 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,277 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,473 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,638 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,151 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,646 |
| Widest Countries East to West | 0 | - | 4.92 | 129,145 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,332 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,665 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,925 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,960 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,986 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,369 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,107 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,679 |
| Countries with Double Letters | 0 | - | 4.96 | 94,160 |
| Countries that End in N | 0 | - | 4.95 | 166,252 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,608 |
| Countries with Six Letters | 0 | - | 4.93 | 211,157 |
| Countries with W | 0 | - | 4.97 | 158,830 |
| Countries with Z | 0 | - | 4.98 | 288,799 |
| Countries with Letters Missing | 0 | - | 4.97 | 185,050 |
| Countries That End in U | 0 | - | 4.95 | 119,930 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,175 |
| Countries that End in O | 0 | - | 4.92 | 158,876 |
| Countries that End in R | 0 | - | 4.87 | 118,516 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,295 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,785 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,754 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,816 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,391 |
| Countries That End in Y | 0 | - | 4.90 | 185,437 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,848 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,098 |
| Countries that End in I | 0 | - | 4.94 | 134,678 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,705 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,415 |
| Countries That End in NIA | 0 | - | 4.92 | 109,298 |
| Countries That End in BIA | 0 | - | 4.93 | 148,573 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,432 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,774 |
| Countries That End in RIA | 0 | - | 4.93 | 126,351 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,339 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,100 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,877 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,213 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,792 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,146 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,442 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,949 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,845 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,001 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,529 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,213 |
| Countries that End in L | 0 | - | 4.94 | 156,300 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,919 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,070 |
| City to Country Quiz #1 | 0 | - | 4.96 | 155,715 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,568 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,623 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,337 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,815 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,335 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,831 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,261 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,053 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,871 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,297 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,524 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,523 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,440,085 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,882 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,813,968 |
| One Border Countries | 0 | - | 4.98 | 466,450 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,604,688 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,476 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,285 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,928 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,338 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,096 |
