| Capital Cities by Body of Water | 0 | - | 4.85 | 57,871 |
| African Great Lakes | 0 | - | 4.82 | 67,008 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,367 |
| Top 10 European Countries by Coastline | 0 | - | 4.86 | 138,760 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,626 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,708 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,976 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.91 | 116,482 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,972 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,410 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,495 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,646 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.98 | 110,032 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,611 |
| African Physical Geography | 0 | - | 4.51 | 31,824 |
| Asian Physical Geography | 0 | - | 4.61 | 35,625 |
| Rivers of the United States | 0 | - | 4.93 | 66,712 |
| Countries with Glaciers | 0 | - | 4.97 | 105,828 |
| Countries with the Most Forest | 0 | - | 4.87 | 148,075 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,986 |
| Countries with the Most Sheep | 0 | - | 4.93 | 103,678 |
| Countries With The Most Bird Species | 0 | - | 4.93 | 33,230 |
| Landforms by Country | 0 | - | 4.52 | 52,024 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,213 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,946 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,961 |
| Capitals by River | 0 | - | 4.55 | 48,391 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 113,171 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,642 |
| Geological Extremes | 0 | - | 4.34 | 40,116 |
| European Physical Geography | 0 | - | 4.26 | 33,601 |
| Name the Constellations - With a Map | 0 | - | 4.91 | 36,234 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,888 |
| South China Sea Countries | 0 | - | 4.78 | 57,862 |
| Boundary Waters | 0 | - | 4.92 | 88,785 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.88 | 35,428 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,741 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,908,198 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,540 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 55,185 |
| Animal Populations of Countries | 0 | - | 4.52 | 44,071 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,564 |
| Top 15 Countries with the Most Cows | 0 | - | 4.74 | 107,505 |
| Bodies of Water by Satellite Image #1 | 0 | - | 4.19 | 72,554 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,738 |
| South American Physical Geography | 0 | - | 4.58 | 18,407 |
| Seas of Europe | 0 | - | 4.37 | 84,935 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,114 |
| World Capitals Quiz | 0 | - | 5.00 | 5,108,551 |
| Landlocked Countries | 0 | - | 4.99 | 426,318 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,672 |
| Least-Forested Countries | 0 | - | 4.53 | 65,431 |
| Top 10 African Countries by Coastline | 0 | - | 4.29 | 48,005 |
| Bay of Bengal Countries With an Empty Map | 0 | - | 4.67 | 75,753 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,355 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,739 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,875 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,806,880 |
| Countries with More Cows than People | 0 | - | 4.46 | 61,682 |
| Countries Closest to the Aegean Sea | 0 | - | 4.75 | 67,040 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 53,469 |
| Sea in the Answers | 0 | - | 4.08 | 49,165 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,196 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,944 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 167,042 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 125,056 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,782 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,600,370 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,791 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,914 |
| Island Countries | 0 | - | 4.99 | 712,702 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,468 |
| Himalayan Countries | 0 | - | 4.93 | 140,416 |
| Andean Countries | 0 | - | 4.94 | 85,561 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,712 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,157 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,276 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,515 |
| Danube Countries | 0 | - | 4.97 | 72,453 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,661 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,885 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,224 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,697 |
| European Landlocked Countries | 0 | - | 4.99 | 147,646 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,366 |
| Countries with the Most Species | 0 | - | 4.99 | 103,593 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,471 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,788 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,903 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,866 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,604 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,052 |
| Countries in the Alps | 0 | - | 4.87 | 118,833 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,739 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,957 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,993 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,069 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,008 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,296 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,454 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,901 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,452 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,216 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,904 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,767 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,590 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,832 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,924 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,935 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,645 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 74,968 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,721 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,880 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,247 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,542 |
| Largest Countries By Category | 0 | - | 4.97 | 158,924 |
| Countries by Countries | 0 | - | 4.96 | 63,685 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,394,857 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,308 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,420 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,792 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,586 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,132 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,179 |
| Northernmost Countries | 0 | - | 4.99 | 364,202 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.63 | 37,956 |
| Countries of South America | 0 | - | 5.00 | 933,206 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,141 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,890,505 |
| "Land" Countries | 0 | - | 4.98 | 338,498 |
| Top 10 Countries with the Most Horses | 0 | - | 4.49 | 69,279 |
| Europe Map Quiz | 0 | - | 5.00 | 4,789,553 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 146,500 |
| Western Europe Map Quiz | 0 | - | 4.85 | 93,993 |
| All Country Flags of the World | 0 | - | 5.00 | 3,717,048 |
| Bodies of Water by Satellite Image #2 | 0 | - | 4.36 | 19,812 |
| Top World Languages | 0 | - | 4.92 | 830,277 |
| Tourist Attraction by Negative Review | 0 | - | 4.85 | 82,825 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,626 |
| Longest Rivers in the UK | 0 | - | 4.42 | 13,842 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 210,194 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 128,591 |
| Longest International Borders | 0 | - | 4.99 | 265,873 |
| Countries with Three Borders | 0 | - | 4.96 | 36,791 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 42,377 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 48,512 |
| Demonym of Every Country | 0 | - | 4.90 | 61,528 |
| Where Do Musk Oxen Live? | 0 | - | 4.63 | 15,353 |
| Elements Named for Countries | 0 | - | 4.52 | 24,984 |
| Analogies of Countries #1 | 0 | - | 4.89 | 68,741 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 105,021 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,724 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,645 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,273 |
| Countries with Megacities | 0 | - | 4.99 | 267,351 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,948 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,206 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,265 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,310 |
| Biggest Cities in the World | 0 | - | 4.91 | 806,016 |
| Global Cities on a World Map | 0 | - | 4.93 | 137,368 |
| Northernmost Capital Cities | 0 | - | 4.98 | 111,419 |
| Most Remote Capital Cities | 0 | - | 4.92 | 54,009 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 46,253 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 110,286 |
| Same Letter Country and Capital | 0 | - | 4.99 | 158,209 |
| Countries by Capital City | 0 | - | 5.00 | 69,467 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 77,903 |
| Capitals of the Largest Countries by Area | 0 | - | 4.96 | 115,265 |
| World Capitals by Proximity | 0 | - | 4.91 | 334,039 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 84,849 |
| Moved Capital Cities | 0 | - | 4.96 | 74,678 |
| Countries by Official Language | 0 | - | 4.95 | 196,077 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,732 |
| Countries in their Native Language | 0 | - | 4.99 | 199,804 |
| Independence from Whom | 0 | - | 4.99 | 213,176 |
| Subdivisions by Country | 0 | - | 4.87 | 50,635 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,528 |
| Megadiverse Countries | 0 | - | 4.96 | 138,581 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,002 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,552 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,735 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,234 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,328 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,878 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,160 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,583 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,102 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,268 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,612 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,404 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,457 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,165 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,599 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,900 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,461 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,602 |
| World Map Quiz | 0 | - | 4.81 | 65,796 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,465 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,742 |
