| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 115,846 |
| North Sea Countries | 0 | - | 4.92 | 86,804 |
| Black Sea Countries | 0 | - | 4.87 | 60,448 |
| Countries That Touch the Red Sea | 0 | - | 4.90 | 65,154 |
| Caspian Sea Countries | 0 | - | 4.90 | 63,253 |
| Countries Bordering the Four Color Seas | 0 | - | 4.92 | 22,893 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,457 |
| Countries With No Rivers | 0 | - | 4.96 | 76,227 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,049 |
| Name a Valid Country on Each River | 0 | - | 4.96 | 61,525 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.90 | 115,171 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,032 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 74,426 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,144 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,549 |
| Countries with Fjords | 0 | - | 4.93 | 100,482 |
| Countries with the Longest Coastline Bordering Each Other | 0 | - | 4.89 | 28,502 |
| Countries with the Longest Coastlines | 0 | - | 4.80 | 411,910 |
| Seas on the World Map | 0 | - | 4.96 | 134,741 |
| Seas of the World | 0 | - | 5.00 | 155,487 |
| Biggest City by River | 0 | - | 4.41 | 52,753 |
| Cities on a Map of the Great Lakes | 0 | - | 4.41 | 44,417 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 35,989 |
| African Great Lakes | 0 | - | 4.82 | 65,708 |
| Seas of Europe | 0 | - | 4.37 | 84,489 |
| Independence from Whom | 0 | - | 4.99 | 210,829 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,353 |
| Megadiverse Countries | 0 | - | 4.96 | 134,547 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,228 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,612 |
| Countries by Founding Story | 0 | - | 4.95 | 76,883 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,434 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,394 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,201 |
| Rivers and Lakes whose Names are Countries | 0 | - | 4.95 | 45,300 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,140 |
| Nile River Basin Countries on a Map | 0 | - | 4.95 | 50,435 |
| Cities by Former Name | 0 | - | 4.84 | 91,273 |
| Recently Independent Countries | 0 | - | 4.98 | 158,394 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,040 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,657 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 86,705 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,162 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,148 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,845 |
| Countries by Coastline Per Capita | 0 | - | 4.59 | 23,152 |
| Countries by Former Name | 0 | - | 4.99 | 124,685 |
| Historical City to Country | 0 | - | 4.84 | 78,331 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,588 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,945 |
| Asian Physical Geography | 0 | - | 4.61 | 35,448 |
| Rivers of the United States | 0 | - | 4.93 | 65,838 |
| U.S. Cities with Landforms in The Name | 0 | - | 4.26 | 70,764 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,107 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,370 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,195 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,899 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,133 |
| Countries of Europe before World War II with a Map | 0 | - | 4.95 | 52,791 |
| Landforms by Country | 0 | - | 4.52 | 51,939 |
| Countries with the Most Sheep | 0 | - | 4.92 | 102,755 |
| Former Flags | 0 | - | 4.97 | 107,179 |
| World's Longest Rivers | 0 | - | 4.88 | 121,827 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,425 |
| Battle to Country | 0 | - | 4.91 | 52,929 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,476 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 111,856 |
| Countries with the Most Wolves | 0 | - | 4.92 | 107,472 |
| World's Longest Rivers on a Map | 0 | - | 4.91 | 87,178 |
| Rivers of Europe Quiz | 0 | - | 4.89 | 55,887 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,548 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 75,872 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,973 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,496 |
| Ancient City to Country | 0 | - | 4.70 | 107,798 |
| City-States | 0 | - | 4.53 | 37,185 |
| Damaged and Destroyed Cities | 0 | - | 4.44 | 44,582 |
| City Where It Happened #2 | 0 | - | 4.42 | 53,043 |
| Capitals by River | 0 | - | 4.55 | 48,270 |
| Countries by Independence Day | 0 | - | 4.61 | 52,674 |
| Former Countries by Capital | 0 | - | 4.45 | 127,253 |
| Former Countries | 0 | - | 4.75 | 132,981 |
| Geological Extremes | 0 | - | 4.34 | 39,981 |
| African Physical Geography | 0 | - | 4.51 | 31,621 |
| European Physical Geography | 0 | - | 4.26 | 33,427 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,597 |
| Largest Lakes in the United States on a Map | 0 | - | 4.90 | 29,782 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,324 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,878 |
| Boundary Waters | 0 | - | 4.92 | 88,235 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 34,970 |
| WWII Geography | 0 | - | 4.81 | 119,887 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 95,660 |
| 100 Geography Questions of Varying Difficulty | 0 | - | 4.94 | 61,820 |
| "Second Best" Geography Edition #2 | 0 | - | 4.87 | 60,132 |
| "Second Best" Geography Edition #3 | 0 | - | 4.90 | 70,046 |
| Cities Where Famous People Died | 0 | - | 4.47 | 33,081 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,171,203 |
| Landlocked Countries | 0 | - | 4.99 | 416,758 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 54,774 |
| Animal Populations of Countries | 0 | - | 4.52 | 43,737 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 562,120 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 42,934 |
| Top 15 Countries with the Most Cows | 0 | - | 4.64 | 92,861 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,658 |
| South American Physical Geography | 0 | - | 4.58 | 18,312 |
| Roman Provinces on a Map | 0 | - | 4.54 | 36,752 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,377 |
| Geography Tile Select Quiz | 0 | - | 4.98 | 95,352 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,302 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 123,552 |
| Cities by Founder and Date | 0 | - | 4.56 | 29,065 |
| City Where It Happened #1 | 0 | - | 4.24 | 106,226 |
| World Capitals Quiz | 0 | - | 5.00 | 5,051,222 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,982 |
| 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 | 124,032 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,441 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,039 |
| Countries in World War I | 0 | - | 4.88 | 227,439 |
| 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 | 85,855 |
| 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 | 146,138 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,785 |
| Countries with the Most Species | 0 | - | 4.99 | 101,809 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,292 |
| Countries Unconquered since 1850 | 0 | - | 4.32 | 64,724 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,910 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,336 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,516 |
| 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 | 57,196 |
| Countries in the Alps | 0 | - | 4.86 | 117,342 |
| 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 |
| Guerrillas by Country | 0 | - | 4.40 | 41,029 |
| 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 | 99,997 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,999 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,814 |
| Longest Uninterrupted Democracies | 0 | - | 4.04 | 33,142 |
| 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 |
| Most Recent Country To ... | 0 | - | 4.33 | 55,531 |
| 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 | 59,434 |
| 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 | 241,059 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,596 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,838 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,546 |
| Largest Countries By Category | 0 | - | 4.97 | 157,279 |
| 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 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.74 | 45,323 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 33,182 |
| All Countries by Population With a Map | 0 | - | 4.98 | 107,776 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,405 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,092 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,741,207 |
| Countries with More Cows than People | 0 | - | 4.45 | 61,010 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,086 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,644 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 81,944 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,326 |
| All 10m+ First-Level Country Subdivisions | 0 | - | 4.97 | 34,618 |
| Biggest Lakes in the World | 0 | - | 4.63 | 89,169 |
| Great Lakes Quiz | 0 | - | 4.78 | 50,239 |
| Famous Rivers | 0 | - | 4.74 | 104,695 |
| City to River #1 | 0 | - | 4.59 | 35,785 |
| Rivers A-Z | 0 | - | 4.35 | 32,737 |
| Most Populous River Basins | 0 | - | 4.55 | 39,602 |
| Rivers that Flow through the Most Countries | 0 | - | 4.53 | 40,214 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 53,119 |
| Sea in the Answers | 0 | - | 4.10 | 48,698 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 207,277 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 127,859 |
| Longest International Borders | 0 | - | 4.99 | 264,312 |
| Countries with Three Borders | 0 | - | 4.96 | 36,351 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 41,780 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 47,876 |
| Famous Immigrants and Exiles | 0 | - | 4.45 | 23,128 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,202 |
| Countries with the Lowest Maximum Elevation | 0 | - | 4.85 | 36,953 |
