| Capital Cities by Body of Water | 0 | - | 4.85 | 57,661 |
| African Great Lakes | 0 | - | 4.82 | 66,241 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,104 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,379 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,404 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,443 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,437 |
| Name a Valid Country Bordering Each Sea | 0 | - | 4.90 | 115,714 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,752 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,173 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,798 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,161 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,712 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,184 |
| African Physical Geography | 0 | - | 4.51 | 31,700 |
| Asian Physical Geography | 0 | - | 4.61 | 35,521 |
| Rivers of the United States | 0 | - | 4.93 | 66,190 |
| Countries with Glaciers | 0 | - | 4.97 | 105,414 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,546 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,648 |
| Countries with the Most Sheep | 0 | - | 4.92 | 103,253 |
| Countries With The Most Bird Species | 0 | - | 4.93 | 32,946 |
| Landforms by Country | 0 | - | 4.52 | 51,970 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,072 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,266 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,820 |
| Capitals by River | 0 | - | 4.55 | 48,312 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 112,493 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,067 |
| Geological Extremes | 0 | - | 4.34 | 40,023 |
| European Physical Geography | 0 | - | 4.26 | 33,509 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,934 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,759 |
| South China Sea Countries | 0 | - | 4.78 | 57,698 |
| Boundary Waters | 0 | - | 4.92 | 88,457 |
| Countries Along the Afro-Eurasia Coast | 0 | - | 4.85 | 35,159 |
| The Same Suffixes - Geography | 0 | - | 4.98 | 96,072 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,446,594 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,447 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 54,969 |
| Animal Populations of Countries | 0 | - | 4.52 | 43,873 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,286 |
| Top 15 Countries with the Most Cows | 0 | - | 4.73 | 106,828 |
| Bodies of Water by Satellite Image #1 | 0 | - | 4.20 | 71,962 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,683 |
| South American Physical Geography | 0 | - | 4.58 | 18,346 |
| Seas of Europe | 0 | - | 4.37 | 84,643 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,530 |
| World Capitals Quiz | 0 | - | 5.00 | 5,072,729 |
| Landlocked Countries | 0 | - | 4.99 | 420,323 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,582 |
| Least-Forested Countries | 0 | - | 4.53 | 65,203 |
| Top 10 African Countries by Coastline | 0 | - | 4.27 | 47,924 |
| Bay of Bengal Countries With an Empty Map | 0 | - | 4.64 | 75,501 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,077 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,626 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,524 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,766,562 |
| Countries with More Cows than People | 0 | - | 4.45 | 61,313 |
| Countries Closest to the Aegean Sea | 0 | - | 4.75 | 66,865 |
| Mekong River Countries Empty Map Quiz | 0 | - | 4.80 | 53,250 |
| Sea in the Answers | 0 | - | 4.10 | 48,926 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,146 |
| World Geography on a Map #1 | 0 | - | 4.94 | 73,590 |
| Countries With More Than 100 Million People | 0 | - | 4.99 | 165,937 |
| Five Most Populated Countries by Hemisphere | 0 | - | 4.97 | 124,164 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,159 |
| Europe Capitals Quiz | 0 | - | 5.00 | 1,586,082 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,002 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,146 |
| Island Countries | 0 | - | 4.99 | 710,321 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,635 |
| Himalayan Countries | 0 | - | 4.95 | 138,034 |
| Andean Countries | 0 | - | 4.95 | 84,232 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,455 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,268 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,095 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,534 |
| Danube Countries | 0 | - | 4.97 | 71,811 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,755 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,200 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,936 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,371 |
| European Landlocked Countries | 0 | - | 4.99 | 146,947 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,345 |
| Countries with the Most Species | 0 | - | 4.99 | 103,073 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,508 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,493 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,651 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,431 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,112 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,496 |
| Countries in the Alps | 0 | - | 4.87 | 117,940 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,062 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,664 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,539 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,434 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,282 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,826 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,454 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,324 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,065 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,693 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,559 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,415 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,055 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,337 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,350 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,491 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,163 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,674 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,786 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,087 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,623 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,093 |
| Largest Countries By Category | 0 | - | 4.97 | 157,900 |
| Countries by Countries | 0 | - | 4.97 | 62,996 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,379,262 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,440 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,212 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,645 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,315 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,493 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,679 |
| Northernmost Countries | 0 | - | 4.99 | 361,160 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,813 |
| Countries of South America | 0 | - | 5.00 | 924,888 |
| Countries of Oceania | 0 | - | 5.00 | 1,053,738 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,871,422 |
| "Land" Countries | 0 | - | 4.98 | 336,156 |
| Top 10 Countries with the Most Horses | 0 | - | 4.49 | 69,026 |
| Europe Map Quiz | 0 | - | 5.00 | 4,762,595 |
| 50 Largest Countries on the World Map Quiz | 0 | - | 4.98 | 145,551 |
| Western Europe Map Quiz | 0 | - | 4.86 | 93,791 |
| All Country Flags of the World | 0 | - | 5.00 | 3,663,136 |
| Bodies of Water by Satellite Image #2 | 0 | - | 4.36 | 19,696 |
| Top World Languages | 0 | - | 4.92 | 822,042 |
| Tourist Attraction by Negative Review | 0 | - | 4.86 | 82,345 |
| Who Controls It? #1 | 0 | - | 4.83 | 48,438 |
| Longest Rivers in the UK | 0 | - | 4.42 | 13,803 |
| Border Crossings Quiz #1 | 0 | - | 4.99 | 208,549 |
| Border Crossings Quiz #2 | 0 | - | 4.99 | 128,173 |
| Longest International Borders | 0 | - | 4.99 | 264,917 |
| Countries with Three Borders | 0 | - | 4.96 | 36,522 |
| Country Connect by Northernmost Point | 0 | - | 4.96 | 42,007 |
| Largest Cities for each Latitude Degree | 0 | - | 4.99 | 48,120 |
| Demonym of Every Country | 0 | - | 4.91 | 59,941 |
| Where Do Musk Oxen Live? | 0 | - | 4.63 | 15,309 |
| Elements Named for Countries | 0 | - | 4.53 | 24,699 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,392 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,341 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,476 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,281 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,429 |
| Countries with Megacities | 0 | - | 4.99 | 263,241 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,263 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,225 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,561 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,262 |
| Biggest Cities in the World | 0 | - | 4.91 | 798,647 |
| Global Cities on a World Map | 0 | - | 4.93 | 136,102 |
| Northernmost Capital Cities | 0 | - | 4.98 | 110,228 |
| Most Remote Capital Cities | 0 | - | 4.92 | 53,390 |
| Capital Cities: Ports and Saints | 0 | - | 4.96 | 45,473 |
| Capitals with the Shortest Names | 0 | - | 4.97 | 109,202 |
| Same Letter Country and Capital | 0 | - | 4.99 | 156,959 |
| Countries by Capital City | 0 | - | 5.00 | 68,240 |
| Capital Cities Based on First Two Letters | 0 | - | 4.85 | 77,149 |
| Capitals of the Largest Countries by Area | 0 | - | 4.97 | 114,635 |
| World Capitals by Proximity | 0 | - | 4.91 | 331,362 |
| Divided Capital Name Puzzle #1 | 0 | - | 4.99 | 84,179 |
| Moved Capital Cities | 0 | - | 4.96 | 74,199 |
| Countries by Official Language | 0 | - | 4.95 | 194,909 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,913 |
| Countries in their Native Language | 0 | - | 4.99 | 198,436 |
| Independence from Whom | 0 | - | 4.99 | 211,678 |
| Subdivisions by Country | 0 | - | 4.86 | 50,354 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,953 |
| Megadiverse Countries | 0 | - | 4.96 | 134,869 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,768 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,252 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,840 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,057 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,894 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,470 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,193 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,928 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,556 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,033 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,320 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,786 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,086 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,858 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,249 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,408 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,611 |
| Which Country of the United Kingdom? | 0 | - | 4.58 | 39,330 |
| World Map Quiz | 0 | - | 4.81 | 64,842 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,340 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,178 |
