| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,082 |
| Rivers of the United States | 0 | - | 4.93 | 66,039 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 334,496 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,210 |
| World Currency Quiz | 0 | - | 4.91 | 301,645 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 123,094 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,297 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,604 |
| Cities with the Biggest Economies | 0 | - | 4.90 | 130,618 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,108 |
| US States Quiz | 0 | - | 5.00 | 16,822,645 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,363 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,818 |
| Countries with the Most Exports | 0 | - | 4.96 | 155,019 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 189,330 |
| Countries by Oil Consumption | 0 | - | 4.96 | 120,242 |
| Richest Island Countries | 0 | - | 4.84 | 100,244 |
| Largest Economies in 2050 | 0 | - | 4.90 | 111,215 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 269,972 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 103,969 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.89 | 84,316 |
| African Great Lakes | 0 | - | 4.82 | 65,977 |
| Top 10 American Countries by Coastline | 0 | - | 4.96 | 88,313 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 69,194 |
| U.S. Geography by Letter - S | 0 | - | 4.55 | 52,679 |
| Mexico Cities Map Quiz | 0 | - | 4.83 | 38,193 |
| Colombia Country Quiz | 0 | - | 4.90 | 40,605 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 746,050 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 330,820 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,456 |
| Countries That Touch the Adriatic Sea | 0 | - | 4.96 | 71,021 |
| Top 10 European Countries by Coastline | 0 | - | 4.87 | 138,255 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,309 |
| Top 10 Asian Countries by Coastline | 0 | - | 4.92 | 96,368 |
| Japanese Companies | 0 | - | 4.28 | 34,181 |
| Richest Countries A-Z | 0 | - | 4.91 | 102,664 |
| Large Countries with Small Economies | 0 | - | 4.95 | 80,726 |
| Richest Countries Bordering Each Other | 0 | - | 4.99 | 153,887 |
| Bordering Countries with the Largest GDPs | 0 | - | 4.97 | 76,308 |
| African Great Lake Countries with an Empty Map | 0 | - | 4.97 | 60,664 |
| Countries Bordering Brazil | 0 | - | 4.96 | 131,417 |
| Countries That Visit Brazil The Most | 0 | - | 4.95 | 49,491 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,090 |
| US States with an Empty Map | 0 | - | 5.00 | 623,009 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,544 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,649 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,825 |
| African Physical Geography | 0 | - | 4.51 | 31,647 |
| Africa A-Z | 0 | - | 4.57 | 46,559 |
| Animals of Australia | 0 | - | 4.52 | 42,277 |
| U.S. Geography by Letter - C | 0 | - | 4.27 | 73,918 |
| U.S. Geography by Letter - A | 0 | - | 4.37 | 62,895 |
| U.S. Geography by Letter - D | 0 | - | 4.09 | 56,909 |
| U.S. Geography by Letter - T | 0 | - | 4.29 | 49,581 |
| U.S. Geography by Letter - P | 0 | - | 4.38 | 51,981 |
| U.S. Geography by Letter - M | 0 | - | 4.14 | 53,138 |
| U.S. Geography by Letter - L | 0 | - | 4.04 | 40,963 |
| U.S. Geography by Letter - G | 0 | - | 4.13 | 39,124 |
| U.S. Geography By Letter - H | 0 | - | 4.35 | 39,935 |
| Biggest Trading Partners - Colombia | 0 | - | 4.88 | 40,215 |
| Biggest U.S. Car Insurance Companies | 0 | - | 4.26 | 6,124 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,060 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,942 |
| People on Money - United States | 0 | - | 4.31 | 63,315 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,226 |
| U.S. States With Palm Trees | 0 | - | 4.52 | 45,748 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,435 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,344 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,763 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,816 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,989 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 528,533 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,368 |
| Asian Physical Geography | 0 | - | 4.60 | 35,472 |
| World's Biggest Airlines | 0 | - | 4.42 | 124,766 |
| Countries Richer Than Their Neighbors | 0 | - | 4.46 | 72,505 |
| Oil Export Dependent Countries | 0 | - | 4.56 | 49,784 |
| Cities With the Most Billionaires | 0 | - | 4.77 | 102,307 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 267,784 |
| "Big Five" African Game Animals | 0 | - | 4.22 | 47,334 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,057 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,532,639 |
| European Geography By Letter - A | 0 | - | 4.51 | 144,261 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 112,462 |
| European Geography By Letter - C | 0 | - | 4.46 | 113,220 |
| European Geography By Letter - D | 0 | - | 4.50 | 107,971 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,050 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,021 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,155 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,489 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,181 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,746 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,058 |
| Europe Map Quiz | 0 | - | 5.00 | 4,753,718 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,294 |
| Famous Germans | 0 | - | 4.50 | 55,119 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,217 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 71,047 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,600 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,339 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,805 |
| Asian Geography by Letter - T | 0 | - | 4.51 | 57,273 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 278,556 |
| Bodies of Water around the Arabian Peninsula | 0 | - | 4.74 | 36,019 |
| Middle East A-Z | 0 | - | 4.47 | 45,965 |
| Busiest Container Ports | 0 | - | 4.11 | 37,370 |
| Most Valuable Sports Teams | 0 | - | 4.33 | 116,327 |
| Countries with the Highest Taxes | 0 | - | 4.38 | 87,493 |
| Countries with the Largest Merchant Navies | 0 | - | 4.56 | 22,884 |
| Top Net Food-Exporting Countries | 0 | - | 4.42 | 33,401 |
| Countries with the Most Exports per Capita | 0 | - | 4.56 | 38,828 |
| Top 10 Countries by Per Capita Crude Oil Production | 0 | - | 4.74 | 57,061 |
| Top 10 Geothermal Countries | 0 | - | 4.56 | 32,091 |
| Five Richest Countries by Continent | 0 | - | 4.69 | 207,006 |
| Countries with the Biggest Economies by GDP | 0 | - | 4.54 | 289,611 |
| Countries with the Most Billionaires per Capita | 0 | - | 4.69 | 93,575 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,313,202 |
| Africa Map Quiz | 0 | - | 5.00 | 2,113,979 |
| Oceania Map Quiz | 0 | - | 4.98 | 640,140 |
| Australian Capitals | 0 | - | 4.92 | 62,689 |
| U.S. Geography by Letter - N | 0 | - | 3.80 | 52,626 |
| U.S. Geography by Letter - E | 0 | - | 3.75 | 48,644 |
| U.S. Geography by Letter - F | 0 | - | 3.87 | 44,884 |
| U.S. Geography by Letter - O | 0 | - | 3.52 | 41,350 |
| U.S. Geography by Letter - R | 0 | - | 4.18 | 30,819 |
| Mexico Country Quiz | 0 | - | 4.49 | 72,306 |
| South American Geography Quiz #2 | 0 | - | 4.61 | 39,299 |
| South American Geography Quiz #1 | 0 | - | 4.62 | 32,548 |
| Argentina Country Quiz | 0 | - | 4.53 | 57,379 |
| Brazil Country Quiz | 0 | - | 4.52 | 101,593 |
| Brazil Cities Map Quiz | 0 | - | 4.62 | 36,548 |
| Chile Country Quiz | 0 | - | 4.75 | 39,966 |
| Ecuador Country Quiz | 0 | - | 4.60 | 31,797 |
| Peru Country Quiz | 0 | - | 4.54 | 48,559 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,416 |
| United States Map Quiz | 0 | - | 4.98 | 4,152,778 |
| Lakes in the United States by Clue | 0 | - | 4.31 | 19,212 |
| U.S. Federal Agency Acronyms | 0 | - | 4.50 | 79,914 |
| California Cities A-Z | 0 | - | 4.06 | 17,173 |
| 10 Closest Megacities to New York City | 0 | - | 4.52 | 67,287 |
| Texas A-Z | 0 | - | 4.18 | 16,354 |
| U.S. History A-Z #1 | 0 | - | 4.36 | 29,927 |
| U.S. States by First Two Letters in 30 Seconds | 0 | - | 4.69 | 1,388,498 |
| US States by Borders in 30 Seconds | 0 | - | 4.67 | 2,676,011 |
| Canadian Prime Ministers | 0 | - | 4.63 | 57,406 |
| Canada A-Z | 0 | - | 4.73 | 32,764 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,970 |
| Official European Union Languages | 0 | - | 4.97 | 238,029 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,564 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,155 |
| European Geography By Letter - F | 0 | - | 4.17 | 92,501 |
| European Geography By Letter - H | 0 | - | 4.30 | 95,673 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,324 |
| European Geography By Letter - I | 0 | - | 4.10 | 95,175 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,840 |
| European Geography By Letter - O | 0 | - | 4.28 | 62,444 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,700 |
| European Physical Geography | 0 | - | 4.26 | 33,454 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,960 |
| European Geography A-Z | 0 | - | 4.29 | 49,180 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 427,319 |
| Famous French People | 0 | - | 4.06 | 34,310 |
| United Kingdom A-Z | 0 | - | 4.51 | 87,541 |
| Asian Geography By Letter - S | 0 | - | 4.17 | 56,038 |
| Asian Geography by Letter - D | 0 | - | 4.27 | 51,859 |
| Asian Geography by Letter - G | 0 | - | 4.35 | 51,145 |
| Asian Geography by Letter - I | 0 | - | 4.36 | 67,699 |
| Asian Geography by Letter - C | 0 | - | 4.32 | 64,659 |
| Asian Geography by Letter - N | 0 | - | 4.33 | 50,164 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,446,184 |
| Asia Map Quiz | 0 | - | 4.99 | 913,954 |
| South China Sea Countries | 0 | - | 4.78 | 57,642 |
| Asian Last Names in the United States | 0 | - | 4.43 | 46,698 |
| A Quiz About Islam | 0 | - | 4.31 | 48,380 |
| Countries That Don't Recognize Israel | 0 | - | 4.67 | 34,729 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,748 |
| Countries of Africa | 0 | - | 5.00 | 2,528,552 |
| Africa Cities Map Quiz | 0 | - | 4.97 | 98,845 |
| Flags of Africa Quiz | 0 | - | 5.00 | 468,776 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,527 |
| Largest Land Animals of Africa | 0 | - | 4.36 | 12,738 |
| Top 10 Biggest African Countries by Area | 0 | - | 4.99 | 216,576 |
| 10 Southernmost Countries in Africa | 0 | - | 4.98 | 116,341 |
| 10 Northernmost Countries in Africa | 0 | - | 4.98 | 160,940 |
| Top 10 Smallest African Countries by Area | 0 | - | 4.96 | 33,020 |
| African East Coast | 0 | - | 4.96 | 95,753 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,089 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,566 |
| Top African Languages on a Map | 0 | - | 4.92 | 73,570 |
| African Island Countries | 0 | - | 4.96 | 101,368 |
| Top 10 African Countries by Coastline | 0 | - | 4.27 | 47,898 |
| Countries of Africa with an Empty Map | 0 | - | 5.00 | 242,966 |
| Oceania Physical Geography | 0 | - | 4.30 | 12,668 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,419 |
| Australian States and Territories | 0 | - | 4.96 | 141,612 |
| Famous Australians by Description | 0 | - | 4.23 | 27,858 |
| Australian Immigration by Country | 0 | - | 4.81 | 77,217 |
| Australia Map Quiz | 0 | - | 4.95 | 343,712 |
| Flags of North and South America | 0 | - | 4.99 | 371,602 |
| 10 Biggest American Countries by Area | 0 | - | 4.95 | 112,491 |
