| Countries of the World Quiz | 0 | - | 5.00 | 47,000,404 |
| Landlocked Countries | 0 | - | 4.99 | 414,597 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,724,923 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,188 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,487 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,340 |
| Island Countries | 0 | - | 4.99 | 708,006 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,998 |
| Himalayan Countries | 0 | - | 4.95 | 135,703 |
| Andean Countries | 0 | - | 4.94 | 83,028 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,375 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,439 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,078 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,736 |
| Danube Countries | 0 | - | 4.97 | 71,184 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,901 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,640 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,703 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,608 |
| European Landlocked Countries | 0 | - | 4.99 | 145,879 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,367 |
| Countries with the Most Species | 0 | - | 4.99 | 95,299 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,533 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,238 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,406 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,018 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,654 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,023 |
| Countries in the Alps | 0 | - | 4.86 | 116,986 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,682 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,461 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,107 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,513 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,298 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,093 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,699 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,842 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,596 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,153 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,232 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,102 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,539 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,827 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,831 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,293 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,737 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,312 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,939 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,841 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,998 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,683 |
| Largest Countries By Category | 0 | - | 4.97 | 156,911 |
| Countries by Countries | 0 | - | 4.96 | 62,362 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,365,095 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,551 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,000 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,860 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,801 |
| Northernmost Countries | 0 | - | 4.99 | 358,271 |
| Countries of South America | 0 | - | 5.00 | 916,606 |
| Countries of Oceania | 0 | - | 5.00 | 1,042,627 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,851,816 |
| "Land" Countries | 0 | - | 4.98 | 333,915 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,747 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,057 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,700 |
| Countries with Megacities | 0 | - | 4.99 | 247,751 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,550 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,237 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,953 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,181 |
| Countries by Official Language | 0 | - | 4.95 | 192,979 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,431 |
| Countries in their Native Language | 0 | - | 4.99 | 196,838 |
| Independence from Whom | 0 | - | 4.99 | 209,951 |
| Subdivisions by Country | 0 | - | 4.86 | 50,115 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,930 |
| Megadiverse Countries | 0 | - | 4.97 | 133,979 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,008 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,967 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,482 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,886 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,786 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,069 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,213 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,230 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,264 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,767 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,765 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,465 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,567 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,555 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,748 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,077 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,884 |
| World Map Quiz | 0 | - | 4.81 | 63,681 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,246 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,439 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,605 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,380 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,120 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,097 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,021 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,212 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,416 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,019 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,456 |
| Widest Countries East to West | 0 | - | 4.92 | 128,954 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,260 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,364 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,615 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,782 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,725 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,153 |
| Countries by Contribution to UN Budget | 0 | - | 4.89 | 74,153 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,625 |
| Countries with Double Letters | 0 | - | 4.96 | 93,578 |
| Countries that End in N | 0 | - | 4.94 | 157,058 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,898 |
| Countries with Six Letters | 0 | - | 4.93 | 210,561 |
| Countries with W | 0 | - | 4.97 | 158,354 |
| Countries with Z | 0 | - | 4.98 | 288,090 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,677 |
| Countries That End in U | 0 | - | 4.95 | 119,587 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,781 |
| Countries that End in O | 0 | - | 4.92 | 158,616 |
| Countries that End in R | 0 | - | 4.87 | 118,337 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,907 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,296 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,467 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,591 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,131 |
| Countries That End in Y | 0 | - | 4.90 | 185,256 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,524 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,821 |
| Countries that End in I | 0 | - | 4.94 | 134,499 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,358 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,257 |
| Countries That End in NIA | 0 | - | 4.92 | 109,077 |
| Countries That End in BIA | 0 | - | 4.92 | 147,798 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,182 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,585 |
| Countries That End in RIA | 0 | - | 4.93 | 126,153 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,114 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,553 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,617 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,981 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,474 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,980 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,214 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,737 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,617 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,857 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,251 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,921 |
| Countries that End in L | 0 | - | 4.94 | 156,109 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,765 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,010 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,580 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,382 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,484 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,733 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,499 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 140,679 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,546 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 223,913 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,848 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,774 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,219 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,447 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,385 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,804,949 |
| One Border Countries | 0 | - | 4.98 | 465,069 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,592,963 |
| Majority Muslim Countries | 0 | - | 4.98 | 369,755 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,090,025 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 447,205 |
| Countries with the Most Borders | 0 | - | 4.97 | 386,219 |
| Countries of Africa | 0 | - | 5.00 | 2,512,215 |
| Countries with Four Letters | 0 | - | 4.99 | 419,108 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,070 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,334 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,069 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,575 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,857 |
| Countries by National Anthem | 0 | - | 4.92 | 71,054 |
| NATO Countries | 0 | - | 4.98 | 276,711 |
| EU Countries Quiz | 0 | - | 4.99 | 270,509 |
| Recently Independent Countries | 0 | - | 4.98 | 158,104 |
| French-Speaking Countries | 0 | - | 4.85 | 269,091 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,419 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,321 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,409 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,983 |
| German-Speaking Countries | 0 | - | 4.89 | 123,564 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,740 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,405 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,566 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,339 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,435 |
