| States of Brazil | 0 | - | 4.97 | 86,939 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,295 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,591 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,253 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,385 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,660 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,242 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,508 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 320,410 |
| States of Mexico | 0 | - | 4.95 | 174,341 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,643 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,474 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,600,282 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,351 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,449 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 273,596 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,660 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,710 |
| Flags of North and South America | 0 | - | 4.99 | 369,526 |
| South American Physical Geography | 0 | - | 4.58 | 18,297 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 715,208 |
| South America Capitals Quiz | 0 | - | 5.00 | 478,750 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,143 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,300 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,161 |
| The Only American Country ... | 0 | - | 4.92 | 121,095 |
| Uruguay Country Quiz | 0 | - | 4.83 | 31,427 |
| US States Quiz | 0 | - | 5.00 | 16,762,065 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,962 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,217 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,371 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,106 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,460 |
| South America A-Z | 0 | - | 4.13 | 10,863 |
| Word Chain - South America | 0 | - | 4.51 | 23,813 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,244 |
| Chile Country Quiz | 0 | - | 4.75 | 39,856 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,718 |
| Peru Country Quiz | 0 | - | 4.54 | 48,439 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,494 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 744,761 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,943 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,965 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,356 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,642 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,847 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,508 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,484 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,897 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,174 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,174 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,256 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 129,807 |
| Which South American Country? | 0 | - | 4.69 | 51,801 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,911 |
| Pixelated United States Map | 0 | - | 4.89 | 93,745 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,893 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,168 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,740 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,033 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,647 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,227 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,816 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,813 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,222 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,466 |
| U.S. States By Population | 0 | - | 4.92 | 152,700 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,791 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,102 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,985 |
| US States with an Empty Map | 0 | - | 5.00 | 620,871 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,876 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,940 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,187 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,331 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,139 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,154 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,637 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,196 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,211 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,383 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,426 |
| Countries of the World - One Minute Sprint | 0 | - | 4.35 | 965,937 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 278,082 |
| Famous People from South America | 0 | - | 4.15 | 21,854 |
| Guyana Country Quiz | 0 | - | 4.49 | 22,678 |
| Venezuela Country Quiz | 0 | - | 4.50 | 30,484 |
| Paraguay Country Quiz | 0 | - | 4.53 | 25,171 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,134 |
| Suriname Country Quiz | 0 | - | 4.60 | 19,716 |
| California Groups of Things | 0 | - | 4.25 | 45,328 |
| New York Groups of Things | 0 | - | 4.38 | 60,012 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,322 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,415 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,147 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,000 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,428 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,667 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,366 |
| Countries by Borders, Bordering Sea, Capital Proximity, Official Language or Currency in 30 Seconds | 0 | - | 4.95 | 237,776 |
| NBA Teams - One Minute Sprint | 0 | - | 4.54 | 154,147 |
| Famous People from Africa | 0 | - | 4.45 | 10,917 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,872 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,207 |
| Word Chain - Africa | 0 | - | 4.47 | 31,521 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 26,987 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,915 |
| Belize Country Quiz | 0 | - | 4.85 | 20,862 |
| Famous Caribbean People | 0 | - | 4.37 | 12,583 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,167 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,650 |
| African-American Historical Figures | 0 | - | 4.18 | 17,148 |
| Europe Map Quiz | 0 | - | 5.00 | 4,742,407 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,097 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,740 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,043 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,088 |
| German Groups of Things | 0 | - | 4.46 | 38,368 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,389 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,406 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,186 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,002 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,319 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,773 |
| Australian Capitals | 0 | - | 4.92 | 62,642 |
| Word Chain - Australia | 0 | - | 4.37 | 38,058 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,759 |
| South American Cities on the Map | 0 | - | 4.56 | 35,294 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,283 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,368 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,507 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,118 |
| United States Country Quiz | 0 | - | 4.43 | 100,941 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,705 |
| Canada Country Quiz | 0 | - | 4.55 | 132,002 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,815 |
| Canada A-Z | 0 | - | 4.73 | 32,707 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,801 |
| Official European Union Languages | 0 | - | 4.97 | 237,500 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,223 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,227 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,348 |
| Asia Map Quiz | 0 | - | 4.99 | 909,987 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,762 |
| World Capitals - One Minute Sprint | 0 | - | 4.21 | 234,075 |
| Countries of Africa | 0 | - | 5.00 | 2,517,901 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,164 |
| African East Coast | 0 | - | 4.96 | 95,418 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,285 |
| Canada or Africa by Area | 0 | - | 4.77 | 18,170 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,007 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,114 |
| Australia Map Quiz | 0 | - | 4.94 | 343,079 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,944 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,428 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,147 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,361 |
| History of Mexico | 0 | - | 4.58 | 15,252 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,633 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,008 |
| Cuba Country Quiz | 0 | - | 4.69 | 51,295 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,627 |
| Jamaica Country Quiz | 0 | - | 4.58 | 34,937 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,441 |
| Top U.S. Universities | 0 | - | 4.15 | 144,429 |
| Largest United States Airlines | 0 | - | 4.39 | 54,905 |
| United States Map Quiz | 0 | - | 4.98 | 4,146,917 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,327 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,824 |
| U.S. States by Governor | 0 | - | 4.43 | 18,006 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,609 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,590 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,701 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,782 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,236 |
| New England States | 0 | - | 4.51 | 59,738 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,740 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,556 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,604 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,936 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,351 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,090 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,520 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,791 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,764 |
| U.S. States by Borders | 0 | - | 4.63 | 35,168 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,340 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,736 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,667 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,545 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,063 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,811 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,428 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,698 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,209 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,257 |
| O Canada Lyrics | 0 | - | 4.47 | 50,860 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,238 |
| NHL Hockey Teams in Canada | 0 | - | 4.35 | 34,692 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,872 |
