| States of Brazil | 0 | - | 4.97 | 87,042 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,335 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,612 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,271 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,705 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,243 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,512 |
| States of Mexico | 0 | - | 4.95 | 174,476 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,701 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,494 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,381 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,396 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,666 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,730 |
| Flags of North and South America | 0 | - | 4.99 | 369,829 |
| South American Physical Geography | 0 | - | 4.58 | 18,303 |
| South America Capitals Quiz | 0 | - | 5.00 | 478,939 |
| California Groups of Things | 0 | - | 4.25 | 45,333 |
| New York Groups of Things | 0 | - | 4.38 | 60,015 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,331 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,312 |
| German Groups of Things | 0 | - | 4.46 | 38,373 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,182 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 320,601 |
| The Only American Country ... | 0 | - | 4.92 | 121,135 |
| Uruguay Country Quiz | 0 | - | 4.83 | 31,435 |
| US States Quiz | 0 | - | 5.00 | 16,770,951 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,066 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,268 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,534 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,412 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,147 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,496 |
| South America A-Z | 0 | - | 4.13 | 10,871 |
| Word Chain - South America | 0 | - | 4.51 | 23,822 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,258 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,456 |
| Chile Country Quiz | 0 | - | 4.75 | 39,868 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,721 |
| Peru Country Quiz | 0 | - | 4.54 | 48,453 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,529 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,033 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,976 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,098 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,579 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,665 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,873 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,630 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,635 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,980 |
| British Groups of Things | 0 | - | 4.25 | 82,758 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,232 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,181 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,570 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 129,852 |
| Which South American Country? | 0 | - | 4.69 | 51,813 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,926 |
| Pixelated United States Map | 0 | - | 4.89 | 93,780 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,940 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,203 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,780 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,086 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,700 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,293 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,873 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,872 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,296 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,533 |
| U.S. States By Population | 0 | - | 4.92 | 152,750 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,849 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,147 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,044 |
| US States with an Empty Map | 0 | - | 5.00 | 621,113 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,909 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,963 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,227 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,373 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,178 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,162 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,683 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,253 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,247 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,451 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,458 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 274,103 |
| Famous People from South America | 0 | - | 4.15 | 21,863 |
| Guyana Country Quiz | 0 | - | 4.49 | 22,690 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,174 |
| Venezuela Country Quiz | 0 | - | 4.50 | 30,493 |
| Paraguay Country Quiz | 0 | - | 4.53 | 25,175 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,142 |
| Suriname Country Quiz | 0 | - | 4.60 | 19,722 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,523 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,188 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,046 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,471 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,679 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,568 |
| Famous People from Africa | 0 | - | 4.45 | 10,921 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,883 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,306 |
| Word Chain - Africa | 0 | - | 4.47 | 31,533 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,003 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,919 |
| Belize Country Quiz | 0 | - | 4.85 | 20,869 |
| Famous Caribbean People | 0 | - | 4.37 | 12,591 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,169 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,677 |
| African-American Historical Figures | 0 | - | 4.18 | 17,154 |
| Europe Map Quiz | 0 | - | 5.00 | 4,744,045 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,108 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,750 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,059 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,100 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,393 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,418 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,189 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,082 |
| Groups of Things - The Bible | 0 | - | 4.43 | 55,088 |
| Africa Map Quiz | 0 | - | 5.00 | 2,109,974 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,172 |
| Australian Capitals | 0 | - | 4.92 | 62,648 |
| Word Chain - Australia | 0 | - | 4.37 | 38,069 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,760 |
| South American Cities on the Map | 0 | - | 4.56 | 35,302 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,284 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,378 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,514 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,120 |
| United States Country Quiz | 0 | - | 4.43 | 100,989 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,715 |
| Canada Country Quiz | 0 | - | 4.55 | 132,045 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,836 |
| Canada A-Z | 0 | - | 4.73 | 32,716 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,830 |
| Official European Union Languages | 0 | - | 4.97 | 237,580 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,266 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,387 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,667 |
| Asia Map Quiz | 0 | - | 4.99 | 910,456 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,779 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,602,259 |
| Famous Duos #2 | 0 | - | 4.21 | 116,668 |
| Famous Duos Quiz #1 | 0 | - | 4.15 | 83,863 |
| Countries of Africa | 0 | - | 5.00 | 2,519,614 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,211 |
| African East Coast | 0 | - | 4.96 | 95,463 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,322 |
| Canada or Africa by Area | 0 | - | 4.77 | 18,180 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,010 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,152 |
| Australia Map Quiz | 0 | - | 4.94 | 343,171 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,958 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,446 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,166 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,373 |
| History of Mexico | 0 | - | 4.58 | 15,256 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,640 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,024 |
| Cuba Country Quiz | 0 | - | 4.69 | 51,307 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,635 |
| Jamaica Country Quiz | 0 | - | 4.58 | 34,946 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,447 |
| Top U.S. Universities | 0 | - | 4.15 | 144,471 |
| Largest United States Airlines | 0 | - | 4.39 | 54,914 |
| United States Map Quiz | 0 | - | 4.98 | 4,147,639 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,388 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,840 |
| U.S. States by Governor | 0 | - | 4.43 | 18,012 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,615 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,600 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,712 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,786 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,243 |
| New England States | 0 | - | 4.51 | 59,752 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,763 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,570 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,620 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,942 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,359 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,101 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,540 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,806 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,776 |
| U.S. States by Borders | 0 | - | 4.63 | 35,181 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,354 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,792 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,687 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,563 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,075 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,813 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,430 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,700 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,223 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,263 |
| O Canada Lyrics | 0 | - | 4.47 | 50,868 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,253 |
| NHL Hockey Teams in Canada | 0 | - | 4.35 | 34,708 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,973 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,438 |
