| States of Brazil | 0 | - | 4.97 | 88,671 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,204 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,261 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,930 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,293 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,794 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,613 |
| States of Mexico | 0 | - | 4.96 | 176,837 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,888 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,810 |
| Brazil Country Quiz | 0 | - | 4.52 | 102,000 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,673 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,794 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,120 |
| Flags of North and South America | 0 | - | 4.99 | 374,448 |
| South American Physical Geography | 0 | - | 4.58 | 18,368 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,643 |
| South America Capitals Quiz | 0 | - | 5.00 | 482,702 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,433 |
| The Only American Country ... | 0 | - | 4.92 | 121,836 |
| US States Quiz | 0 | - | 5.00 | 16,921,710 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,846 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,342 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,399 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 323,260 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,394 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,159 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 105,125 |
| South America A-Z | 0 | - | 4.13 | 10,924 |
| Word Chain - South America | 0 | - | 4.51 | 23,935 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,600 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,717 |
| Chile Country Quiz | 0 | - | 4.75 | 40,136 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,908 |
| Peru Country Quiz | 0 | - | 4.54 | 48,763 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,127 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,103 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,892 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,912 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,232 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,944 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,414 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,973 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,415 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,680 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,059 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,367 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,110 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,621 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,473 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,491 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,690 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 130,799 |
| Which South American Country? | 0 | - | 4.69 | 52,005 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,246 |
| Pixelated United States Map | 0 | - | 4.88 | 94,488 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,964 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,009 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,715 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,851 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,199 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,139 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,735 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,686 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,362 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,677 |
| U.S. States By Population | 0 | - | 4.92 | 153,756 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,739 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,606 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,859 |
| US States with an Empty Map | 0 | - | 5.00 | 626,115 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,521 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,337 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,803 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,957 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,618 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,453 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,617 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,529 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,403 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,895 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,537 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 109,046 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 275,941 |
| Word Chain - Africa | 0 | - | 4.47 | 31,655 |
| Famous People from South America | 0 | - | 4.15 | 22,023 |
| Guyana Country Quiz | 0 | - | 4.50 | 22,842 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,830 |
| Venezuela Country Quiz | 0 | - | 4.51 | 30,652 |
| Paraguay Country Quiz | 0 | - | 4.54 | 25,339 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,301 |
| Suriname Country Quiz | 0 | - | 4.61 | 19,857 |
| California Groups of Things | 0 | - | 4.25 | 45,530 |
| New York Groups of Things | 0 | - | 4.35 | 63,956 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,508 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,505 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,339 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,976 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,359 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,014 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,691 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,270 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,951 |
| Belize Country Quiz | 0 | - | 4.85 | 21,015 |
| Famous Caribbean People | 0 | - | 4.37 | 12,635 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,210 |
| Name a Valid Answer - United States #1 | 0 | - | 4.63 | 94,146 |
| African-American Historical Figures | 0 | - | 4.18 | 17,238 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,926 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,081 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,361 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,018 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,308 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,302 |
| German Groups of Things | 0 | - | 4.46 | 38,529 |
| Asia Geography Quiz #1 | 0 | - | 4.70 | 53,559 |
| Asia Geography Quiz #2 | 0 | - | 4.56 | 48,611 |
| Asia Geography Quiz #3 | 0 | - | 4.49 | 32,289 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,735 |
| Famous People from Africa | 0 | - | 4.45 | 10,967 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,009 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,630 |
| Four Letter African Geography | 0 | - | 4.67 | 19,489 |
| Astronomy Decoder | 0 | - | 4.49 | 38,114 |
| Oceania Map Quiz | 0 | - | 4.98 | 653,973 |
| Australian Capitals | 0 | - | 4.92 | 62,759 |
| Word Chain - Australia | 0 | - | 4.38 | 38,173 |
| Islands of the Galápagos | 0 | - | 4.54 | 4,785 |
| South American Cities on the Map | 0 | - | 4.53 | 35,474 |
| Largest Virgin Islands | 0 | - | 4.24 | 5,306 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,601 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,618 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,218 |
| United States Country Quiz | 0 | - | 4.43 | 101,741 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,971 |
| Canada Country Quiz | 0 | - | 4.54 | 132,687 |
| Canada Cities Map Quiz | 0 | - | 4.64 | 124,374 |
| Canada A-Z | 0 | - | 4.73 | 32,893 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,343 |
| Official European Union Languages | 0 | - | 4.97 | 238,962 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,156 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,139 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,813 |
| Asia Map Quiz | 0 | - | 4.99 | 919,922 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,068 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,119 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,634,028 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,078 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,960 |
| Australia Map Quiz | 0 | - | 4.95 | 345,238 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,679 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,115 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,529 |
| History of Mexico | 0 | - | 4.58 | 15,336 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,734 |
| El Salvador Country Quiz | 0 | - | 4.63 | 31,774 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,238 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,588 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,770 |
| Jamaica Country Quiz | 0 | - | 4.58 | 35,154 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,673 |
| Top U.S. Universities | 0 | - | 4.15 | 145,388 |
| Largest United States Airlines | 0 | - | 4.39 | 55,076 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,862 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,864 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 80,040 |
| U.S. States by Governor | 0 | - | 4.43 | 18,079 |
| U.S. Political Parties in History | 0 | - | 4.44 | 27,717 |
| U.S. Government Agencies | 0 | - | 4.44 | 19,712 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,962 |
| Florida Pro Sport Teams | 0 | - | 4.61 | 11,865 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,399 |
| Events in U.S. History | 0 | - | 4.41 | 28,718 |
| New England States | 0 | - | 4.51 | 59,837 |
| U.S. License Plates Picture Quiz | 0 | - | 4.61 | 52,996 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,904 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,901 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,040 |
| U.S. States with the Highest Percentage of Farmland | 0 | - | 4.80 | 65,539 |
| U.S. States with the Lowest Percentage of Farmland | 0 | - | 4.74 | 55,251 |
| Add a Letter - Make a U.S. State | 0 | - | 4.70 | 82,926 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,122 |
| Top 10 Tallest U.S. States North to South | 0 | - | 4.74 | 41,011 |
| U.S. States by Borders | 0 | - | 4.61 | 35,381 |
| Walking Across U.S. State Borders with Hints | 0 | - | 4.74 | 35,073 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,548 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,149 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,851 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,936 |
| 50 States, 50 Cities - Hard Version | 0 | - | 4.46 | 44,277 |
| Top 10 U.S. States with the Highest Elevation | 0 | - | 4.51 | 67,912 |
| U.S. States with the Lowest Average Elevation | 0 | - | 4.55 | 38,527 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,795 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,994 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,324 |
| O Canada Lyrics | 0 | - | 4.47 | 50,987 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,652 |
| NHL Hockey Teams in Canada | 0 | - | 4.35 | 35,081 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,857 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,745 |
