| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,363 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,639 |
| United States Map Quiz | 0 | - | 4.98 | 4,153,829 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,670 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,426 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,320 |
| US States Quiz | 0 | - | 5.00 | 16,830,402 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,355 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,574 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,116 |
| Most-Visited U.S. Cities | 0 | - | 4.85 | 93,480 |
| Every U.S. Metro Area on a Map | 0 | - | 4.97 | 81,530 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,313 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,710 |
| Vietnam War Countries | 0 | - | 4.83 | 94,069 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,185 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,557 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,145 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,337 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,506 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,604 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,782 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,040 |
| Pixelated United States Map | 0 | - | 4.87 | 94,064 |
| US States with an Empty Map | 0 | - | 5.00 | 623,221 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,635 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,157 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,199 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,684 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,955 |
| U.S. States By Population | 0 | - | 4.92 | 152,998 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,180 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,313 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,373 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,100 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,455 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,765 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,505 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,041 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,419 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,110 |
| Top 10 Least Populous U.S. States | 0 | - | 4.94 | 191,319 |
| Top 10 Most Populous U.S. States | 0 | - | 4.97 | 174,783 |
| Most Guessed U.S. Cities | 0 | - | 4.89 | 105,746 |
| U.S. Cities with the Biggest Economies | 0 | - | 4.83 | 72,660 |
| US State Capitals Quiz - No Hints | 0 | - | 4.98 | 95,011 |
| U.S. State Capitals Map Quiz | 0 | - | 4.93 | 143,609 |
| 10 Westernmost U.S. State Capitals | 0 | - | 4.90 | 48,069 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,168 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,474 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,131 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,156 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,097 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,097 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,969 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,529 |
| Europe Map Quiz | 0 | - | 5.00 | 4,755,289 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,595 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,098 |
| Rivers of the United States | 0 | - | 4.93 | 66,068 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,335 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 505,420 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,718 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,375 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,416 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,884 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,475 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,391 |
| U.S. States with the Lowest Population Density | 0 | - | 4.92 | 93,823 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,795 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,833 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,000 |
| Random State Capital to U.S. State | 0 | - | 4.84 | 88,812 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,536 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,751 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,243 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,977 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,446,461 |
| Oceania Map Quiz | 0 | - | 4.98 | 640,541 |
| Africa Map Quiz | 0 | - | 5.00 | 2,114,558 |
| Asia Map Quiz | 0 | - | 4.99 | 914,393 |
| Random U.S. States on a Map | 0 | - | 4.96 | 625,006 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,006 |
| U.S. State Flags | 0 | - | 4.89 | 169,707 |
| Hawaiian Islands | 0 | - | 4.83 | 42,651 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,480 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,326 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,268 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,741 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,317 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,829 |
| Flags of Europe Quiz | 0 | - | 4.99 | 1,239,858 |
| Flags of Asia Quiz | 0 | - | 4.99 | 611,378 |
| Countries of Europe by Population | 0 | - | 4.98 | 180,116 |
| Most Populous Countries by Year | 0 | - | 4.83 | 110,362 |
| Biggest Cities in Europe in 1700 | 0 | - | 4.93 | 70,772 |
| Biggest European Cities by Century | 0 | - | 4.99 | 145,230 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 135,087 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.88 | 76,065 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.98 | 92,398 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 67,151 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,427 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 97,067 |
| Cities in European History #1 | 0 | - | 4.63 | 133,789 |
| Southernmost Major Cities in the U.S. | 0 | - | 4.43 | 36,560 |
| 15 Largest Cities in Africa With a Map | 0 | - | 4.95 | 110,392 |
| Most-Visited Cities in Europe | 0 | - | 4.83 | 74,807 |
| Cities in U.S. History #1 | 0 | - | 4.31 | 45,384 |
| Africa Capitals Quiz | 0 | - | 4.99 | 735,776 |
| Former Capitals | 0 | - | 4.88 | 71,376 |
| Asia Capitals Quiz | 0 | - | 4.98 | 690,944 |
| Europe Capital to Country | 0 | - | 4.99 | 249,544 |
| Asia Capital to Country | 0 | - | 4.96 | 126,465 |
| EU Capitals with No Hints | 0 | - | 4.96 | 145,564 |
| European Capitals by Map | 0 | - | 4.99 | 138,532 |
| African Capitals by Map | 0 | - | 4.99 | 133,345 |
| South America Capitals Quiz | 0 | - | 5.00 | 480,389 |
| Asian Capitals by Map | 0 | - | 4.98 | 62,067 |
| 10 Westernmost Capital Cities in Europe | 0 | - | 4.88 | 91,868 |
| 10 Northernmost Capital Cities in Europe | 0 | - | 4.96 | 84,225 |
| European Coastal Capitals | 0 | - | 4.95 | 90,371 |
| 10 Easternmost Capital Cities in Asia | 0 | - | 4.89 | 52,495 |
| Capitals of Oceania Quiz | 0 | - | 4.99 | 269,128 |
| Europe by Capitals and Borders in 30 Seconds | 0 | - | 4.88 | 223,535 |
| Capitals of Mediterranean Countries | 0 | - | 4.95 | 81,738 |
| Random U.S. State Capitals on a Map | 0 | - | 4.92 | 103,827 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,525 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,167 |
| Countries of Europe - One Minute Sprint | 0 | - | 4.94 | 1,326,166 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,254 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,595 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 114,817 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 218,154 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,905 |
| Countries of the Middle East | 0 | - | 4.96 | 200,728 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,995 |
| The Only European Country ... | 0 | - | 4.91 | 215,970 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 211,724 |
| Slavic Countries | 0 | - | 4.96 | 111,486 |
| African Island Countries | 0 | - | 4.96 | 101,415 |
| European Countries NOT in NATO | 0 | - | 4.90 | 60,764 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 72,023 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,577 |
| Straight Shot to Antarctica | 0 | - | 4.94 | 42,787 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 125,558 |
| Countries of Europe After World War II | 0 | - | 4.99 | 188,037 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 156,236 |
| Countries of Africa | 0 | - | 5.00 | 2,529,906 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,020,477 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 126,650 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 107,270 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,153 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,635 |
| 10 Biggest European Countries by Area | 0 | - | 4.99 | 192,418 |
| 10 Biggest Asian Countries by Area | 0 | - | 4.97 | 153,519 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,509 |
| Top 10 Most Populous American Countries | 0 | - | 4.97 | 144,082 |
| 10 Westernmost Countries in Europe | 0 | - | 4.96 | 150,962 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 116,380 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,990 |
| 10 Southernmost Countries in Asia | 0 | - | 4.97 | 98,966 |
| 10 Easternmost Countries in Asia | 0 | - | 4.99 | 107,801 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,071 |
| Canada Provinces Map Quiz | 0 | - | 4.99 | 639,123 |
| Middle East Map Quiz | 0 | - | 4.99 | 1,380,787 |
| Central America and Caribbean Map Quiz | 0 | - | 4.89 | 901,472 |
| South America Map Quiz | 0 | - | 5.00 | 1,547,251 |
| Latin American Countries Map Quiz | 0 | - | 4.97 | 129,274 |
| European Landmarks Map Quiz | 0 | - | 4.97 | 86,977 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,449 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,716 |
| North America Map Quiz | 0 | - | 4.98 | 247,634 |
| South and Central Asia Map Quiz | 0 | - | 4.94 | 98,622 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,601 |
| Australia Map Quiz | 0 | - | 4.95 | 343,816 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 363,934 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,864 |
| East Asia Cities Map Quiz | 0 | - | 4.96 | 110,080 |
| UK Cities Map Quiz | 0 | - | 4.96 | 464,011 |
| Flags of Africa Quiz | 0 | - | 5.00 | 469,218 |
| Flags of North and South America | 0 | - | 4.99 | 371,855 |
| Australian States and Territories | 0 | - | 4.96 | 141,690 |
| Canada Provinces and Territories | 0 | - | 5.00 | 341,310 |
| Territories of the United States | 0 | - | 4.79 | 52,332 |
| Counties of England | 0 | - | 4.97 | 794,766 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 170,592 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.81 | 55,867 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,229 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,571 |
| African East Coast | 0 | - | 4.96 | 95,820 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,244 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,666 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 309,957 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 243,049 |
| Countries of Asia with an Empty Map | 0 | - | 4.98 | 229,997 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,533,589 |
| Confederate States of the U.S. Civil War | 0 | - | 4.90 | 129,124 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,424 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,217 |
| U.S. Senators by State | 0 | - | 4.45 | 39,905 |
