| States of Brazil | 0 | - | 4.97 | 87,131 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 53,368 |
| Brazil States Map Quiz | 0 | - | 4.85 | 47,651 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,289 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,719 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,254 |
| South American Geography Quiz #1 | 0 | - | 4.73 | 32,515 |
| States of Mexico | 0 | - | 4.95 | 174,632 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,742 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,511 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,418 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,405 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,671 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,743 |
| Flags of North and South America | 0 | - | 4.99 | 370,076 |
| South American Physical Geography | 0 | - | 4.58 | 18,308 |
| South America Capitals Quiz | 0 | - | 5.00 | 479,141 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,314 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,200 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 320,682 |
| The Only American Country ... | 0 | - | 4.92 | 121,161 |
| Uruguay Country Quiz | 0 | - | 4.83 | 31,443 |
| US States Quiz | 0 | - | 5.00 | 16,777,199 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,114 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,321 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,671 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,452 |
| Mexico States Map Quiz | 0 | - | 4.84 | 104,177 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 104,531 |
| South America A-Z | 0 | - | 4.13 | 10,873 |
| Word Chain - South America | 0 | - | 4.51 | 23,829 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,275 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,472 |
| Chile Country Quiz | 0 | - | 4.75 | 39,883 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,731 |
| Peru Country Quiz | 0 | - | 4.54 | 48,470 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,556 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 745,145 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,023 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 242,225 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,752 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,679 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 65,895 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,740 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 275,696 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 166,064 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,993 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 109,283 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 96,028 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,190 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,832 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 129,889 |
| Which South American Country? | 0 | - | 4.69 | 51,822 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,941 |
| Pixelated United States Map | 0 | - | 4.89 | 93,806 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,989 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,237 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,812 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,121 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,764 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,337 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,914 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,907 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,341 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,575 |
| U.S. States By Population | 0 | - | 4.92 | 152,780 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,880 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,160 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,073 |
| US States with an Empty Map | 0 | - | 5.00 | 621,309 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,949 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,973 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,252 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,399 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,197 |
| Most-Visited Countries by Canadians | 0 | - | 4.82 | 39,175 |
| Countries Closest to Canada | 0 | - | 4.90 | 197,717 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,311 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,268 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,493 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,485 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 274,168 |
| Famous People from South America | 0 | - | 4.15 | 21,871 |
| Guyana Country Quiz | 0 | - | 4.49 | 22,699 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,206 |
| Venezuela Country Quiz | 0 | - | 4.50 | 30,502 |
| Paraguay Country Quiz | 0 | - | 4.53 | 25,182 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,151 |
| Suriname Country Quiz | 0 | - | 4.60 | 19,732 |
| California Groups of Things | 0 | - | 4.25 | 45,337 |
| New York Groups of Things | 0 | - | 4.38 | 60,020 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,336 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,660 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,213 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,079 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,505 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,686 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,741 |
| Famous People from Africa | 0 | - | 4.45 | 10,923 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 32,901 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,361 |
| Word Chain - Africa | 0 | - | 4.47 | 31,542 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,009 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,921 |
| Belize Country Quiz | 0 | - | 4.85 | 20,877 |
| Famous Caribbean People | 0 | - | 4.37 | 12,592 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,169 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,693 |
| African-American Historical Figures | 0 | - | 4.18 | 17,157 |
| Europe Map Quiz | 0 | - | 5.00 | 4,745,431 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,126 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,770 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,077 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,118 |
| German Groups of Things | 0 | - | 4.46 | 38,380 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,399 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,424 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,191 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,140 |
| Astronomy Decoder | 0 | - | 4.50 | 37,928 |
| Africa Map Quiz | 0 | - | 5.00 | 2,110,483 |
| Oceania Map Quiz | 0 | - | 4.98 | 638,471 |
| Australian Capitals | 0 | - | 4.92 | 62,657 |
| Word Chain - Australia | 0 | - | 4.37 | 38,073 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,760 |
| South American Cities on the Map | 0 | - | 4.56 | 35,307 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,285 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,385 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,516 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,126 |
| United States Country Quiz | 0 | - | 4.43 | 101,025 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,722 |
| Canada Country Quiz | 0 | - | 4.54 | 132,069 |
| Canada Cities Map Quiz | 0 | - | 4.63 | 123,863 |
| Canada A-Z | 0 | - | 4.73 | 32,717 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,845 |
| Official European Union Languages | 0 | - | 4.97 | 237,636 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,304 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 426,520 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,443,865 |
| Asia Map Quiz | 0 | - | 4.99 | 910,821 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 59,786 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,603,658 |
| Countries of Africa | 0 | - | 5.00 | 2,521,046 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,247 |
| African East Coast | 0 | - | 4.96 | 95,510 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,354 |
| Canada or Africa by Area | 0 | - | 4.77 | 18,191 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,014 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,190 |
| Australia Map Quiz | 0 | - | 4.94 | 343,250 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,970 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,459 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,184 |
| Mexico Cities Map Quiz | 0 | - | 4.77 | 33,376 |
| History of Mexico | 0 | - | 4.58 | 15,260 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,645 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,040 |
| Cuba Country Quiz | 0 | - | 4.69 | 51,319 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,640 |
| Jamaica Country Quiz | 0 | - | 4.58 | 34,956 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,456 |
| Top U.S. Universities | 0 | - | 4.15 | 144,507 |
| Largest United States Airlines | 0 | - | 4.39 | 54,923 |
| United States Map Quiz | 0 | - | 4.98 | 4,148,281 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 208,436 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,845 |
| U.S. States by Governor | 0 | - | 4.43 | 18,015 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,620 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,604 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.42 | 59,723 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,787 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,246 |
| New England States | 0 | - | 4.51 | 59,755 |
| U.S. License Plates Picture Quiz | 0 | - | 4.59 | 52,773 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,589 |
| U.S. States by Land Area | 0 | - | 4.61 | 52,630 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 37,948 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,362 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,103 |
| Add a Letter - Make a U.S. State | 0 | - | 4.72 | 82,556 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 55,816 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 40,787 |
| U.S. States by Borders | 0 | - | 4.63 | 35,189 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 34,976 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,360 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 101,809 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,694 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,585 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,079 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,819 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,438 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,703 |
| U.S. States with the Fewest Borders | 0 | - | 4.77 | 113,236 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,264 |
| O Canada Lyrics | 0 | - | 4.47 | 50,875 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,270 |
| NHL Hockey Teams in Canada | 0 | - | 4.35 | 34,714 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,053 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,464 |
