| States of Brazil | 0 | - | 4.97 | 88,682 |
| All First-Level Subdivisions of South America on a Map | 0 | - | 4.92 | 54,210 |
| Brazil States Map Quiz | 0 | - | 4.86 | 48,263 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,937 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,297 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 40,069 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,622 |
| States of Mexico | 0 | - | 4.96 | 176,845 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,892 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,812 |
| Brazil Country Quiz | 0 | - | 4.52 | 102,005 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,674 |
| Hispanic Last Names in the U.S. | 0 | - | 4.31 | 54,795 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,121 |
| Flags of North and South America | 0 | - | 4.99 | 374,465 |
| South American Physical Geography | 0 | - | 4.58 | 18,368 |
| Uruguay Country Quiz | 0 | - | 4.84 | 31,644 |
| South America Capitals Quiz | 0 | - | 5.00 | 482,716 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,434 |
| The Only American Country ... | 0 | - | 4.92 | 121,837 |
| US States Quiz | 0 | - | 5.00 | 16,922,243 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,850 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,348 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,401 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 323,268 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 92,399 |
| Mexico States Map Quiz | 0 | - | 4.84 | 105,172 |
| Countries of South America with an Empty Map | 0 | - | 4.94 | 105,129 |
| South America A-Z | 0 | - | 4.13 | 10,924 |
| Word Chain - South America | 0 | - | 4.51 | 23,936 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,601 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,719 |
| Chile Country Quiz | 0 | - | 4.75 | 40,136 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,909 |
| Peru Country Quiz | 0 | - | 4.54 | 48,763 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,130 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 748,119 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,893 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,921 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,251 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,945 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,416 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,982 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,425 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,693 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,059 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,370 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,113 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,624 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,473 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 84,497 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,691 |
| South American Capitals - Map Quiz | 0 | - | 4.98 | 130,804 |
| Which South American Country? | 0 | - | 4.69 | 52,006 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,247 |
| Pixelated United States Map | 0 | - | 4.88 | 94,491 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,965 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,013 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,716 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,853 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,220 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,144 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,738 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,688 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,364 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,683 |
| U.S. States By Population | 0 | - | 4.92 | 153,758 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,742 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,608 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,860 |
| US States with an Empty Map | 0 | - | 5.00 | 626,133 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,528 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,339 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,805 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,958 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,618 |
| Most-Visited Countries by Canadians | 0 | - | 4.83 | 39,455 |
| Countries Closest to Canada | 0 | - | 4.91 | 198,619 |
| Countries that Beat Canada | 0 | - | 4.91 | 98,532 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,407 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,895 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,540 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 109,046 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 275,956 |
| Word Chain - Africa | 0 | - | 4.47 | 31,656 |
| Famous People from South America | 0 | - | 4.15 | 22,023 |
| Guyana Country Quiz | 0 | - | 4.50 | 22,844 |
| Countries that Beat Brazil | 0 | - | 4.49 | 68,836 |
| Venezuela Country Quiz | 0 | - | 4.51 | 30,653 |
| Paraguay Country Quiz | 0 | - | 4.54 | 25,340 |
| Bolivia Country Quiz | 0 | - | 4.63 | 26,302 |
| 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 | 63,961 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,509 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,513 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,341 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,979 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,362 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 62,019 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 530,718 |
| Random Sequential Oceanic Countries on a Map | 0 | - | 4.97 | 27,272 |
| Famous Mexicans and Mexican-Americans | 0 | - | 4.15 | 16,951 |
| Belize Country Quiz | 0 | - | 4.85 | 21,015 |
| Famous Caribbean People | 0 | - | 4.37 | 12,636 |
| Fictional Characters from the Midwest by Picture | 0 | - | 4.04 | 19,211 |
| Name a Valid Answer - United States #1 | 0 | - | 4.63 | 94,147 |
| African-American Historical Figures | 0 | - | 4.18 | 17,240 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,927 |
| Europe Map Quiz | 0 | - | 5.00 | 4,772,218 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,361 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,021 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,311 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,304 |
| 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 | 32,290 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,740 |
| Famous People from Africa | 0 | - | 4.45 | 10,968 |
| Africa Geography Quiz #2 | 0 | - | 4.59 | 33,010 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,634 |
| Four Letter African Geography | 0 | - | 4.67 | 19,491 |
| Astronomy Decoder | 0 | - | 4.49 | 38,115 |
| Oceania Map Quiz | 0 | - | 4.98 | 654,105 |
| 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 | 101,745 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 76,971 |
| Canada Country Quiz | 0 | - | 4.54 | 132,689 |
| 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 | 69,344 |
| Official European Union Languages | 0 | - | 4.97 | 238,968 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,157 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,152 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,449,820 |
| Asia Map Quiz | 0 | - | 4.99 | 919,950 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.75 | 60,069 |
| Africa Map Quiz | 0 | - | 5.00 | 2,122,168 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,634,266 |
| Oceania Geography Quiz | 0 | - | 4.55 | 22,079 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,964 |
| Australia Map Quiz | 0 | - | 4.95 | 345,244 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,687 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 53,123 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,530 |
| History of Mexico | 0 | - | 4.58 | 15,339 |
| Paraguay... or Uruguay? | 0 | - | 4.55 | 26,734 |
| El Salvador Country Quiz | 0 | - | 4.63 | 31,776 |
| Costa Rica Country Quiz | 0 | - | 4.75 | 32,238 |
| Cuba Country Quiz | 0 | - | 4.70 | 51,590 |
| Haiti... or Dominican Republic? | 0 | - | 4.70 | 40,771 |
| Jamaica Country Quiz | 0 | - | 4.58 | 35,156 |
| Haiti Country Quiz | 0 | - | 4.79 | 32,674 |
| Top U.S. Universities | 0 | - | 4.15 | 145,391 |
| Largest United States Airlines | 0 | - | 4.39 | 55,076 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,900 |
| Countries Closest to the U. S. | 0 | - | 4.41 | 209,868 |
| 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 | 59,966 |
| 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 | 52,997 |
| U.S. States with the Fewest Immigrants | 0 | - | 4.63 | 65,904 |
| U.S. States by Land Area | 0 | - | 4.63 | 52,903 |
| Top 10 U.S. States by Inland Water Area | 0 | - | 4.53 | 38,041 |
| 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 | 82,927 |
| Top 10 Widest U.S. States East to West | 0 | - | 4.70 | 56,124 |
| 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 | 35,075 |
| 10 Easternmost U.S. States | 0 | - | 4.53 | 56,549 |
| The Only U.S. State ... #1 | 0 | - | 4.52 | 102,150 |
| U.S. States with the Longest International Borders | 0 | - | 4.78 | 45,853 |
| Longest U.S. State Borders | 0 | - | 4.67 | 39,939 |
| 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 | 38,529 |
| U.S. States With the Highest Average Elevation | 0 | - | 4.61 | 32,796 |
| U.S. States with the Fewest Borders | 0 | - | 4.78 | 113,995 |
| U.S. States with the Most Borders | 0 | - | 4.53 | 62,327 |
| O Canada Lyrics | 0 | - | 4.47 | 50,987 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,653 |
| NHL Hockey Teams in Canada | 0 | - | 4.35 | 35,083 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,862 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,746 |
