| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,823 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,125 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,421 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.88 | 87,428 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,801 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 43,070 |
| "Big Five" African Game Animals | 0 | - | 4.22 | 47,455 |
| Countries with the Most Sheep | 0 | - | 4.93 | 103,514 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,832 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,432 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 112,863 |
| Largest Land Animals of the Americas | 0 | - | 4.39 | 20,301 |
| American Countries With No Atlantic Coastline | 0 | - | 4.94 | 92,680 |
| African Great Lakes | 0 | - | 4.82 | 66,765 |
| Largest Land Animals of Africa | 0 | - | 4.36 | 12,791 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 531,640 |
| Countries with the Most Wild Elephants | 0 | - | 4.63 | 55,097 |
| Animal Populations of Countries | 0 | - | 4.52 | 44,002 |
| North American Cat-Named Sports Teams | 0 | - | 4.43 | 33,777 |
| Animals by Close-up Image | 0 | - | 4.42 | 218,816 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 45,892 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,410 |
| Mammals by Picture #1 | 0 | - | 4.70 | 92,229 |
| Top 15 Countries with the Most Cows | 0 | - | 4.74 | 107,421 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,539 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,766 |
| Name that Bug | 0 | - | 4.12 | 45,609 |
| Animals of Australia | 0 | - | 4.52 | 42,435 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,324 |
| Asian Physical Geography | 0 | - | 4.61 | 35,591 |
| Asian Countries by First 2 Letters | 0 | - | 4.92 | 280,263 |
| African Physical Geography | 0 | - | 4.51 | 31,781 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 269,011 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,894 |
| Countries with More Cows than People | 0 | - | 4.46 | 61,567 |
| Fish by Picture #1 | 0 | - | 4.41 | 108,744 |
| North American Bird-Named Teams | 0 | - | 4.44 | 67,965 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,642 |
| Australian Capitals | 0 | - | 4.92 | 62,802 |
| Rivers of the United States | 0 | - | 4.93 | 66,531 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,551 |
| Official European Union Languages | 0 | - | 4.97 | 239,400 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,417 |
| Europe Map Quiz | 0 | - | 5.00 | 4,779,862 |
| Largest Land Animals of Asia | 0 | - | 3.64 | 8,333 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,161 |
| Extinct Animals | 0 | - | 4.16 | 27,555 |
| Reptile Picture Quiz | 0 | - | 4.32 | 14,349 |
| Earliest Domestication of Animals | 0 | - | 4.34 | 28,289 |
| Animals in the News | 0 | - | 4.37 | 26,820 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,502 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,731 |
| Mammals by Picture #3 | 0 | - | 4.39 | 62,390 |
| Mammals by Picture #4 | 0 | - | 4.03 | 34,250 |
| Mammals by Picture #2 | 0 | - | 4.28 | 58,440 |
| Top 10 Countries with the Most Horses | 0 | - | 4.49 | 69,186 |
| Where Do Musk Oxen Live? | 0 | - | 4.63 | 15,338 |
| Megadiverse Countries | 0 | - | 4.96 | 135,159 |
| Oceania Map Quiz | 0 | - | 4.98 | 657,744 |
| Australian Animals By Picture | 0 | - | 4.45 | 31,734 |
| European Physical Geography | 0 | - | 4.26 | 33,571 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 430,107 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,990 |
| Asia Map Quiz | 0 | - | 4.99 | 922,807 |
| Africa Map Quiz | 0 | - | 5.00 | 2,125,689 |
| Top Countries for Shark Attacks | 0 | - | 4.47 | 45,901 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,224 |
| Australia Map Quiz | 0 | - | 4.95 | 345,719 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,396 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,380 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,221 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,667 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,211 |
| 10 Easternmost Countries in Europe | 0 | - | 4.87 | 116,683 |
| The Only European Country ... | 0 | - | 4.91 | 218,275 |
| European Countries NOT in NATO | 0 | - | 4.90 | 62,106 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,992 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 99,665 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,386,128 |
| Countries of Africa | 0 | - | 5.00 | 2,552,256 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 47,593 |
| African East Coast | 0 | - | 4.96 | 96,529 |
| Western Africa Map Quiz | 0 | - | 4.97 | 74,400 |
| Sea Creatures by Picture | 0 | - | 4.27 | 17,785 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,982 |
| Countries with Fjords | 0 | - | 4.94 | 101,195 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,466 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,714 |
| Australian States and Territories | 0 | - | 4.96 | 142,583 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,440 |
| Australia True or False | 0 | - | 4.87 | 57,060 |
| Flags of North and South America | 0 | - | 4.99 | 375,756 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,854 |
| Top 10 Most Populous American Countries | 0 | - | 4.96 | 144,624 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 130,377 |
| South America Map Quiz | 0 | - | 5.00 | 1,553,968 |
| South American Physical Geography | 0 | - | 4.58 | 18,385 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,705 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,028,660 |
| North America Map Quiz | 0 | - | 4.98 | 250,598 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,915 |
| Canada Provinces and Territories | 0 | - | 5.00 | 345,053 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 643,037 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 55,447 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,253,340 |
| Celtic Nations | 0 | - | 4.61 | 47,058 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,333,430 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 193,259 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 151,809 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 220,159 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 87,592 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,868 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 312,124 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.99 | 174,803 |
| Seas of Europe | 0 | - | 4.37 | 84,828 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,043 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 89,909 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 128,626 |
| Slavic Countries | 0 | - | 4.96 | 112,156 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,605 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,328 |
| Counties of England | 0 | - | 4.97 | 801,065 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 359,953 |
| Flags of Asia Quiz | 0 | - | 4.99 | 618,035 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,596 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 154,330 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 99,692 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 108,968 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 127,552 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 108,088 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,868 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 231,228 |
| All First-Level Subdivisions of Asia on a Map | 0 | - | 4.91 | 50,387 |
| Countries of the Middle East | 0 | - | 4.96 | 202,221 |
| Countries where Arabic is an Official Language | 0 | - | 4.85 | 72,674 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 99,386 |
| Flags of Africa Quiz | 0 | - | 5.00 | 475,545 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 218,027 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 117,284 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 162,057 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,948 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 154,284 |
| Top African Languages on a Map | 0 | - | 4.94 | 74,894 |
| African Island Countries | 0 | - | 4.96 | 102,217 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 244,277 |
| Countries With The Most Bird Species | 0 | - | 4.93 | 33,130 |
| Fish by Picture #2 | 0 | - | 4.09 | 18,662 |
| Flags of Oceania | 0 | - | 5.00 | 261,747 |
| All First-Level Subdivisions of Oceania on a Map | 0 | - | 4.97 | 27,526 |
| Australia Cities Map Quiz | 0 | - | 4.82 | 146,271 |
| Australia Country Quiz | 0 | - | 4.43 | 69,771 |
| Australia... or New Zealand? | 0 | - | 4.83 | 61,872 |
| Regions of New Zealand | 0 | - | 4.84 | 28,661 |
| The Only American Country ... | 0 | - | 4.92 | 122,038 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,490 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 904,133 |
| North American Capitals - Map Quiz | 0 | - | 4.88 | 58,548 |
| Countries of North America with an Empty Map | 0 | - | 4.99 | 95,014 |
| All First-Level Subdivisions of North America on a Map | 0 | - | 4.97 | 64,662 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,756 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,572 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,793 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,751 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,167 |
| US States Quiz | 0 | - | 5.00 | 16,959,060 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,360 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,535 |
| European Diaspora - Top 11 Countries | 0 | - | 4.90 | 96,299 |
| 10 European Countries with the Most Tourists | 0 | - | 4.98 | 138,217 |
| Three Band Flags of Europe | 0 | - | 4.98 | 194,161 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,589 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,682 |
| Pixelated Europe Map | 0 | - | 4.88 | 123,260 |
| Monarchies of Europe | 0 | - | 4.90 | 98,611 |
| European Countries with One Border | 0 | - | 4.97 | 183,476 |
| European Countries with the Fewest Borders | 0 | - | 4.97 | 180,221 |
| European Geography By Letter - B #2 | 0 | - | 4.87 | 88,221 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,051 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,818 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 125,307 |
| Regions of France Map Quiz | 0 | - | 4.97 | 145,326 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,502 |
| States of Germany | 0 | - | 4.95 | 153,929 |
| Germany Immigration by Country | 0 | - | 4.86 | 81,509 |
| Regions of Italy | 0 | - | 4.92 | 76,645 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,636 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,974 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,590 |
| UK Cities Map Quiz | 0 | - | 4.96 | 465,860 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,356 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,643 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,803 |
| Champions League Winners | 0 | - | 4.92 | 1,012,798 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,867 |
| 10 Asian Countries with the Most Tourists | 0 | - | 4.89 | 106,582 |
| Asian Countries with the Shortest Names | 0 | - | 4.97 | 135,857 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 136,990 |
| Pixelated Asia Map | 0 | - | 4.90 | 73,625 |
| Monarchies of Asia | 0 | - | 4.97 | 71,372 |
| Asian Country Superlatives | 0 | - | 4.84 | 81,168 |
