| City to Country Quiz #1 | 0 | - | 4.94 | 135,060 |
| City to Country Quiz #3 | 0 | - | 4.86 | 100,821 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 72,314 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 331,788 |
| Countries of the World Quiz | 0 | - | 5.00 | 41,537,361 |
| Historical City to Country | 0 | - | 4.82 | 72,851 |
| Members of the Arab League | 0 | - | 4.85 | 65,309 |
| Sahara Desert Countries | 0 | - | 4.97 | 129,462 |
| Himalayan Countries | 0 | - | 4.94 | 107,680 |
| Andean Countries | 0 | - | 4.91 | 59,766 |
| Countries with the Oldest Median Age | 0 | - | 4.84 | 60,838 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 50,506 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 103,898 |
| Coffee Producing Countries | 0 | - | 4.82 | 54,678 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 54,002 |
| Danube Countries | 0 | - | 4.96 | 57,087 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 92,106 |
| Countries With an "Ese" Demonym | 0 | - | 4.96 | 65,189 |
| Countries with the Best Passports | 0 | - | 4.87 | 72,355 |
| Countries with the Worst Passports | 0 | - | 4.89 | 50,142 |
| Countries with the Most Immigrants | 0 | - | 4.87 | 110,438 |
| European Landlocked Countries | 0 | - | 4.99 | 136,817 |
| Partially Recognized Countries | 0 | - | 4.98 | 90,540 |
| Countries with the Most Species | 0 | - | 4.99 | 89,779 |
| Countries 197 to 205 | 0 | - | 4.87 | 57,031 |
| Tropic of Cancer Countries | 0 | - | 4.96 | 44,924 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 44,230 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 48,853 |
| Countries that Use the Peso | 0 | - | 4.82 | 46,760 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 59,010 |
| Countries with a AAA Credit Rating | 0 | - | 4.87 | 49,715 |
| Countries in the Alps | 0 | - | 4.84 | 103,551 |
| Top Five Importing Partners by Country | 0 | - | 4.98 | 86,158 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 88,832 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 72,089 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 79,164 |
| Northernmost Countries by Continent | 0 | - | 4.97 | 94,683 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 88,141 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 90,303 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 46,609 |
| Biggest Country by Body of Water | 0 | - | 4.96 | 45,605 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 55,216 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.88 | 69,978 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 48,902 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 36,924 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 96,344 |
| Arctic Ocean Countries | 0 | - | 4.93 | 72,485 |
| Countries with the Most Grassland | 0 | - | 4.94 | 70,053 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 99,877 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 61,792 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 53,871 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 200,720 |
| World Countries - Blind Typing | 0 | - | 5.00 | 74,678 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 42,692 |
| Largest Countries By Category | 0 | - | 4.97 | 146,057 |
| Countries by Countries | 0 | - | 4.96 | 55,346 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,145,339 |
| Country Flags with the Most White | 0 | - | 4.90 | 125,737 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 59,078 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 79,238 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,208,566 |
| Spanish-Speaking Countries | 0 | - | 4.94 | 343,750 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 360,610 |
| Island Countries Quiz | 0 | - | 4.99 | 666,495 |
| Biggest Countries by Area | 0 | - | 5.00 | 943,459 |
| Northernmost Countries | 0 | - | 4.99 | 330,098 |
| Countries of South America | 0 | - | 5.00 | 805,559 |
| Countries of Oceania | 0 | - | 5.00 | 908,002 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,600,663 |
| City to Country Quiz #2 | 0 | - | 4.74 | 91,446 |
| City to Country Quiz #4 | 0 | - | 4.51 | 77,679 |
| City to Country Quiz #5 | 0 | - | 4.75 | 75,334 |
| City to Country Quiz #6 | 0 | - | 4.54 | 60,356 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 128,208 |
| Countries with Megacities | 0 | - | 4.99 | 200,668 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 174,409 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 99,346 |
| Countries With More than 200 Million People | 0 | - | 4.93 | 97,526 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.97 | 65,347 |
| Top 50 Countries by Population - In Order | 0 | - | 4.97 | 251,609 |
| Countries by Official Language | 0 | - | 4.96 | 174,598 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.92 | 252,010 |
| Countries in their Native Language | 0 | - | 4.98 | 179,744 |
| Independence from Whom | 0 | - | 4.99 | 188,182 |
| Subdivisions by Country | 0 | - | 4.82 | 46,771 |
| Who Controlled These Colonies? | 0 | - | 4.89 | 115,022 |
| Megadiverse Countries | 0 | - | 4.96 | 126,334 |
| Countries With the Most English Speakers | 0 | - | 4.87 | 92,905 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 107,327 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.82 | 47,701 |
| 15 Biggest Island Countries | 0 | - | 4.99 | 132,638 |
| Most Recently-Settled Countries | 0 | - | 4.92 | 49,664 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 79,170 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.95 | 145,825 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 77,522 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 41,745 |
| Countries by Sports League Revenue | 0 | - | 4.88 | 44,716 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 102,065 |
| Countries Furthest from the United States | 0 | - | 4.94 | 72,727 |
| Countries with the Highest HDI | 0 | - | 4.95 | 131,225 |
| Straight Shot to the Arctic Circle | 0 | - | 4.92 | 69,180 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 65,811 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 85,137 |
| World Map Quiz | 0 | - | 4.91 | 50,840 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 117,111 |
| Smallest Countries with at Least One Border | 0 | - | 4.90 | 82,386 |
| Southernmost Countries of the World | 0 | - | 4.99 | 209,055 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 92,213 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.90 | 109,479 |
| Countries With the Most Languages | 0 | - | 4.91 | 176,499 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 88,425 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.86 | 72,720 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 87,818 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 54,801 |
| Tallest Countries North to South | 0 | - | 4.85 | 111,283 |
| Widest Countries East to West | 0 | - | 4.93 | 120,251 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 69,050 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 160,104 |
| Countries with the Longest Perimeter | 0 | - | 4.81 | 72,575 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 93,112 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 86,344 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 120,299 |
| Countries with the Most Desert | 0 | - | 4.92 | 105,945 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 66,700 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 32,306 |
| Countries with Double Letters | 0 | - | 4.96 | 71,118 |
| Countries that End in N | 0 | - | 4.94 | 135,378 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 232,705 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 189,839 |
| Countries with W | 0 | - | 4.96 | 125,146 |
| Countries with Z | 0 | - | 4.98 | 263,340 |
| Countries with Letters Missing | 0 | - | 4.97 | 169,207 |
| Countries That End in U | 0 | - | 4.95 | 109,065 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 91,800 |
| Countries that End in O | 0 | - | 4.92 | 148,360 |
| Countries that End in R | 0 | - | 4.85 | 97,151 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 147,896 |
| Countries Ending in "IA" | 0 | - | 4.99 | 173,380 |
| Countries by First and Last Letter #1 | 0 | - | 4.98 | 157,273 |
| Countries by Last Two Letters | 0 | - | 4.90 | 117,392 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 130,326 |
| Countries That End in Y | 0 | - | 4.90 | 162,191 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 162,458 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 122,024 |
| Countries that End in I | 0 | - | 4.92 | 115,044 |
| Countries Based on First Two Letters #2 | 0 | - | 4.98 | 151,144 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 89,153 |
| Countries That End in NIA | 0 | - | 4.93 | 101,561 |
| Countries That End in BIA | 0 | - | 4.91 | 126,998 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 154,725 |
| Countries Whose Names Start with Saint | 0 | - | 4.89 | 110,642 |
| Countries That End in RIA | 0 | - | 4.90 | 101,658 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 101,360 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 203,663 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 121,124 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 112,190 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 78,774 |
| Countries with a Unique Last Letter | 0 | - | 4.91 | 93,505 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 97,769 |
| Countries that are Free from U.S.A. | 0 | - | 4.90 | 43,453 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 42,000 |
| Countries that End in L | 0 | - | 4.95 | 135,519 |
| "Land" Countries | 0 | - | 4.98 | 291,720 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 190,827 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 81,915 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 210,292 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 169,545 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 117,437 |
| Five Smallest Countries by Continent | 0 | - | 4.97 | 134,372 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 195,680 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 141,944 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 66,403 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.84 | 103,024 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 83,031 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.93 | 57,126 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,323,922 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 352,384 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,102,716 |
| One Border Countries | 0 | - | 4.98 | 413,952 |
| Countries With One Word and Three A's | 0 | - | 4.87 | 31,596 |
| 48 Asian Countries, 48 Cities | 0 | - | 4.48 | 21,860 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,449,776 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.94 | 67,081 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 247,348 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 110,131 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 104,035 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.94 | 71,785 |
| Countries by National Anthem | 0 | - | 4.95 | 62,113 |
| NATO Countries Quiz | 0 | - | 4.98 | 228,334 |
| EU Countries Quiz | 0 | - | 4.99 | 230,426 |
| Recently Independent Countries Quiz | 0 | - | 4.98 | 145,806 |
| Natural Features of Countries #1 | 0 | - | 4.85 | 78,232 |
| Countries That Use the Euro | 0 | - | 4.93 | 65,303 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 228,559 |
| Countries with Nuclear Weapons | 0 | - | 4.89 | 233,786 |
| German-Speaking Countries | 0 | - | 4.88 | 118,077 |
| Countries with Wild Tigers | 0 | - | 4.95 | 112,118 |
| Countries with Wild Penguins | 0 | - | 4.93 | 91,083 |
| Solve the Secret Country #1 | 0 | - | 4.95 | 133,480 |
| Top Five Countries by Religion | 0 | - | 4.90 | 144,855 |
