| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 116,074 |
| North Sea Countries | 0 | - | 4.92 | 87,492 |
| Black Sea Countries | 0 | - | 4.87 | 60,650 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,454 |
| Caspian Sea Countries | 0 | - | 4.90 | 63,547 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 23,143 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,729 |
| Countries With No Rivers | 0 | - | 4.96 | 76,915 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,277 |
| Name a Valid Country on Each River | 0 | - | 4.95 | 62,278 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.91 | 115,964 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,653 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,803 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,571 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,899 |
| Countries with Fjords | 0 | - | 4.94 | 101,044 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 29,047 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 413,384 |
| Seas on the World Map | 0 | - | 4.96 | 135,541 |
| Seas of the World | 0 | - | 5.00 | 157,393 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,605 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,118 |
| African Great Lakes | 0 | - | 4.82 | 66,508 |
| Seas of Europe | 0 | - | 4.37 | 84,720 |
| Independence from Whom | 0 | - | 4.99 | 212,124 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,747 |
| Megadiverse Countries | 0 | - | 4.96 | 135,018 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,602 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,486 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,470 |
| Countries by Founding Story | 0 | - | 4.95 | 77,382 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,595 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,631 |
| Nile River Basin Countries on a Map | 0 | - | 4.95 | 50,759 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,869 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,542 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,816 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,232 |
| Biggest City by River | 0 | - | 4.38 | 52,884 |
| Cities by Former Name | 0 | - | 4.83 | 91,718 |
| Recently Independent Countries | 0 | - | 4.98 | 159,480 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,970 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,293 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,303 |
| Countries of the World in 1900 | 0 | - | 4.89 | 85,254 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,744 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 151,319 |
| Countries by Former Name | 0 | - | 4.99 | 125,354 |
| Historical City to Country | 0 | - | 4.84 | 78,636 |
| African Physical Geography | 0 | - | 4.51 | 31,742 |
| Asian Physical Geography | 0 | - | 4.61 | 35,561 |
| Rivers of the United States | 0 | - | 4.93 | 66,327 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,763 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,567 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 100,036 |
| Countries of the World in 1444 | 0 | - | 4.98 | 60,430 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,579 |
| Countries with the Most Sheep | 0 | - | 4.92 | 103,385 |
| Former Flags | 0 | - | 4.97 | 107,974 |
| World's Longest Rivers | 0 | - | 4.90 | 137,022 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.27 | 70,818 |
| Landforms by Country | 0 | - | 4.52 | 51,980 |
| Capitals by River | 0 | - | 4.55 | 48,344 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,056 |
| Battle to Country | 0 | - | 4.91 | 53,521 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,924 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 112,657 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,252 |
| Geological Extremes | 0 | - | 4.34 | 40,058 |
| European Physical Geography | 0 | - | 4.26 | 33,541 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 87,953 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 56,574 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,739 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,369 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,093 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,311 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,795 |
| Ancient City to Country | 0 | - | 4.70 | 108,143 |
| City-States | 0 | - | 4.53 | 37,307 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,718 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,151 |
| Countries by Independence Day | 0 | - | 4.61 | 52,779 |
| Former Countries by Capital | 0 | - | 4.45 | 127,594 |
| Former Countries | 0 | - | 4.75 | 133,925 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 30,015 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,073 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,974 |
| Boundary Waters | 0 | - | 4.92 | 88,579 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.86 | 35,256 |
| WWII Geography | 0 | - | 4.81 | 120,559 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,280 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.93 | 62,733 |
| "Second Best" Geography Edition #2 | 0 | - | 4.88 | 60,619 |
| "Second Best" Geography Edition #3 | 0 | - | 4.89 | 70,587 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,185 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,590,170 |
| Countries in World War I | 0 | - | 4.88 | 228,462 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 229,365 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 55,033 |
| Animal Populations of Countries | 0 | - | 4.52 | 43,934 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 43,374 |
| Top 15 Countries with the Most Cows | 0 | - | 4.74 | 107,293 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,696 |
| South American Physical Geography | 0 | - | 4.58 | 18,367 |
| Roman Provinces on a Map | 0 | - | 4.54 | 37,046 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,129 |
| City Where It Happened #1 | 0 | - | 4.23 | 106,389 |
| World Capitals Quiz | 0 | - | 5.00 | 5,083,727 |
| Landlocked Countries | 0 | - | 4.99 | 422,073 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,872 |
| Guerrillas by Country | 0 | - | 4.40 | 41,154 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,228 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,750 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,616 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 577,099 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.77 | 45,629 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,482 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,779,492 |
| Countries with More Cows than People | 0 | - | 4.45 | 61,446 |
| Biggest Lakes in the World | 0 | - | 4.63 | 89,737 |
| Great Lakes Quiz | 0 | - | 4.80 | 50,480 |
| Famous Rivers | 0 | - | 4.75 | 105,064 |
| City to River #1 | 0 | - | 4.59 | 35,864 |
| Rivers A-Z | 0 | - | 4.35 | 32,797 |
| Most Populous River Basins | 0 | - | 4.55 | 39,748 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,389 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 53,322 |
| Sea in the Answers | 0 | - | 4.08 | 49,024 |
| Famous Immigrants and Exiles | 0 | - | 4.46 | 23,546 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,543 |
| People Born on Islands | 0 | - | 4.39 | 52,971 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,713 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 96,030 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 166,427 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,437 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,637 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,590,729 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,529 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,335 |
| Island Countries | 0 | - | 4.99 | 711,077 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,511 |
| Himalayan Countries | 0 | - | 4.94 | 138,775 |
| Andean Countries | 0 | - | 4.93 | 84,638 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,833 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,864 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,457 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,824 |
| Danube Countries | 0 | - | 4.97 | 72,024 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,024 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,431 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,336 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,810 |
| European Landlocked Countries | 0 | - | 4.99 | 147,151 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,665 |
| Countries with the Most Species | 0 | - | 4.99 | 103,248 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,782 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,598 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,726 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,548 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,239 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,671 |
| Countries in the Alps | 0 | - | 4.87 | 118,223 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,170 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,051 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,660 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,600 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,525 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,954 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,688 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,502 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,184 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,860 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,662 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,533 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,238 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,483 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,535 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,927 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,316 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 63,914 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,094 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,985 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,149 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,238 |
| Largest Countries By Category | 0 | - | 4.97 | 158,229 |
| Countries by Countries | 0 | - | 4.96 | 63,238 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,383,885 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,700 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,293 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,571 |
| All Countries by Population With a Map | 0 | - | 4.98 | 109,637 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,033 |
| Communist Countries in History | 0 | - | 4.63 | 496,491 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,410 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,682 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,049,989 |
| Northernmost Countries | 0 | - | 4.99 | 361,998 |
| Inventions by Country #1 | 0 | - | 4.47 | 55,089 |
| Countries of South America | 0 | - | 5.00 | 927,481 |
| Countries of Oceania | 0 | - | 5.00 | 1,057,106 |
