| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,451,513 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,285,839 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 100,610 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 139,129 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 59,454 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,666,736 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 390,248 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,900,457 |
| Countries of the World in 1900 | 0 | - | 4.88 | 77,738 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 185,692 |
| All Countries by Northernmost Point on Land | 0 | - | 4.90 | 119,788 |
| 20 Countries on an Empty Map #1 | 0 | - | 4.95 | 59,429 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 141,937 |
| Sahara Desert Countries | 0 | - | 4.97 | 149,331 |
| Himalayan Countries | 0 | - | 4.94 | 125,468 |
| Andean Countries | 0 | - | 4.93 | 70,637 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 58,157 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 115,638 |
| Coffee Producing Countries | 0 | - | 4.83 | 61,525 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 60,633 |
| Danube Countries | 0 | - | 4.97 | 61,716 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 98,072 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 82,730 |
| Countries with the Worst Passports | 0 | - | 4.92 | 75,447 |
| Countries with the Most Immigrants | 0 | - | 4.89 | 141,109 |
| European Landlocked Countries | 0 | - | 4.99 | 142,116 |
| Partially Recognized Countries | 0 | - | 4.98 | 99,905 |
| Countries with the Most Species | 0 | - | 4.99 | 93,174 |
| Countries 197 to 205 | 0 | - | 4.87 | 64,836 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 47,093 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 46,177 |
| Countries that Use the Peso | 0 | - | 4.89 | 57,056 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 70,576 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 54,485 |
| Countries in the Alps | 0 | - | 4.86 | 112,048 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 91,623 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 99,516 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 76,071 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 84,540 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 111,722 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 92,659 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 96,184 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 50,511 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 48,500 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 59,535 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 51,743 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 39,542 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,848 |
| Arctic Ocean Countries | 0 | - | 4.94 | 76,514 |
| Countries with the Most Grassland | 0 | - | 4.93 | 74,335 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 110,992 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 65,472 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 57,388 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.94 | 40,637 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 226,399 |
| World Countries - Blind Typing | 0 | - | 5.00 | 97,638 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 45,717 |
| Largest Countries By Category | 0 | - | 4.97 | 152,544 |
| Countries by Countries | 0 | - | 4.96 | 59,216 |
| Country Flags with the Most White | 0 | - | 4.85 | 133,297 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,958 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.86 | 46,549 |
| All Countries by Population With a Map | 0 | - | 4.98 | 97,442 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 93,953 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 84,855 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,527,360 |
| Pixelated World Map | 0 | - | 5.00 | 137,728 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 95,019 |
| Countries of the World in 1444 | 0 | - | 4.98 | 56,943 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 54,286 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 77,815 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 362,754 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 386,675 |
| Island Countries Quiz | 0 | - | 4.99 | 695,374 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,006,301 |
| Northernmost Countries | 0 | - | 4.99 | 345,013 |
| Countries of South America | 0 | - | 5.00 | 874,790 |
| Countries of Oceania | 0 | - | 5.00 | 990,488 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,756,512 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 162,578 |
| Countries with Megacities | 0 | - | 4.99 | 222,185 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 189,496 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 107,644 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 128,827 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 75,034 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 301,230 |
| Global Cities on a World Map | 0 | - | 4.95 | 104,964 |
| Countries by Official Language | 0 | - | 4.95 | 186,060 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 284,619 |
| Countries in their Native Language | 0 | - | 4.98 | 190,397 |
| Independence from Whom | 0 | - | 4.99 | 202,526 |
| Subdivisions by Country | 0 | - | 4.85 | 48,945 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 125,662 |
| Megadiverse Countries | 0 | - | 4.97 | 131,267 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 123,999 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 53,379 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 122,692 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 73,502 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.86 | 49,581 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 156,905 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 60,246 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 88,660 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 150,162 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 81,069 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,635 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 69,644 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 105,309 |
| Countries Furthest from the United States | 0 | - | 4.93 | 86,487 |
| Countries with the Highest HDI | 0 | - | 4.95 | 134,965 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 72,684 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 69,193 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 101,985 |
| World Map Quiz | 0 | - | 4.87 | 59,102 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 87,794 |
| Countries by Founding Story | 0 | - | 4.95 | 73,870 |
| Countries by Road Signs | 0 | - | 4.98 | 50,419 |
| Southernmost Countries of the World | 0 | - | 4.99 | 220,328 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 99,952 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 117,763 |
| Countries With the Most Languages | 0 | - | 4.89 | 191,904 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.93 | 97,417 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 89,580 |
| Countries with the Most Prisoners | 0 | - | 4.93 | 94,766 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 58,993 |
| Tallest Countries North to South | 0 | - | 4.84 | 116,600 |
| Widest Countries East to West | 0 | - | 4.92 | 125,709 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,425 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 181,550 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 95,975 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 91,131 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 126,255 |
| Countries with the Most Desert | 0 | - | 4.93 | 124,115 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,284 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,818 |
| Countries with Double Letters | 0 | - | 4.97 | 85,825 |
| Countries that End in N | 0 | - | 4.94 | 149,333 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 249,816 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 203,469 |
| Countries with W | 0 | - | 4.97 | 152,365 |
| Countries with Z | 0 | - | 4.98 | 279,422 |
| Countries with Letters Missing | 0 | - | 4.97 | 179,082 |
| Countries That End in U | 0 | - | 4.95 | 116,122 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 103,091 |
| Countries that End in O | 0 | - | 4.92 | 155,747 |
| Countries that End in R | 0 | - | 4.83 | 100,816 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 152,722 |
| Countries Ending in "IA" | 0 | - | 4.99 | 200,473 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 165,379 |
| Countries by Last Two Letters | 0 | - | 4.88 | 131,565 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 137,467 |
| Countries That End in Y | 0 | - | 4.91 | 182,909 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 191,666 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 147,719 |
| Countries that End in I | 0 | - | 4.92 | 118,130 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 176,176 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 93,104 |
| Countries That End in NIA | 0 | - | 4.92 | 106,597 |
| Countries That End in BIA | 0 | - | 4.92 | 144,614 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 162,411 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 115,766 |
| Countries That End in RIA | 0 | - | 4.92 | 120,901 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 107,051 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 218,044 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 128,678 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 120,634 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 86,522 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 72,005 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 49,577 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 99,222 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 121,156 |
| Countries that are Free from U.S.A. | 0 | - | 4.88 | 47,019 |
| Countries with the Word "And" | 0 | - | 4.98 | 91,141 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 49,148 |
| Countries that End in L | 0 | - | 4.94 | 153,007 |
| "Land" Countries | 0 | - | 4.98 | 301,270 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 199,005 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,245 |
| City to Country Quiz #1 | 0 | - | 4.96 | 151,431 |
| City to Country Quiz #3 | 0 | - | 4.87 | 105,495 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 76,212 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 221,805 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 194,355 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 123,272 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 158,314 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 218,080 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 148,267 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 69,316 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 106,362 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.94 | 85,205 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 60,313 |
| ALL First-Level Subdivisions of the World With a Map | 0 | - | 5.00 | 134,143 |
| All First-Level Subdivisions of Europe by Proximity | 0 | - | 4.85 | 73,159 |
| Top World Languages on a Map | 0 | - | 4.92 | 99,123 |
| Official Languages of the World on the Disappearing World Map | 0 | - | 4.98 | 109,794 |
| 407 Islands on the World Map | 0 | - | 4.99 | 32,524 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 44,125 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,393,304 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 367,281 |
| One Border Countries | 0 | - | 4.98 | 448,280 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.74 | 40,647 |
