| 19th Century A-Z | 0 | - | 4.73 | 36,176 |
| 18th Century A-Z | 0 | - | 4.60 | 33,015 |
| 16th Century A-Z | 0 | - | 4.57 | 16,462 |
| 15th Century A-Z | 0 | - | 4.45 | 20,696 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 142,659 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 187,211 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 165,551 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 183,191 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 292,784 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 173,320 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 68,880 |
| 17th Century A-Z | 0 | - | 4.62 | 25,279 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 223,626 |
| Name an Official Language A-Z | 0 | - | 4.92 | 142,707 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 111,628 |
| Empires A-Z | 0 | - | 4.49 | 42,432 |
| History by Letter - A | 0 | - | 4.50 | 144,891 |
| History by Letter - B | 0 | - | 4.48 | 163,431 |
| History by Letter - C | 0 | - | 4.68 | 161,582 |
| History by Letter - E | 0 | - | 4.49 | 133,129 |
| History by Letter - G | 0 | - | 4.45 | 115,669 |
| History by Letter - H | 0 | - | 4.44 | 129,496 |
| History by Letter - J | 0 | - | 4.49 | 146,223 |
| History by Letter - N | 0 | - | 4.43 | 98,428 |
| History by Letter - S | 0 | - | 4.46 | 89,212 |
| History by Letter - T | 0 | - | 4.42 | 100,638 |
| History by Letter - W | 0 | - | 4.46 | 103,614 |
| History by Letter - M | 0 | - | 4.53 | 113,787 |
| History by Letter - K | 0 | - | 4.48 | 96,237 |
| History by Letter - L | 0 | - | 4.47 | 106,619 |
| History by Letter - I | 0 | - | 4.46 | 98,884 |
| Geography by Letter - T | 0 | - | 4.84 | 142,866 |
| People in History A-Z #1 | 0 | - | 4.62 | 94,560 |
| People in History A-Z #2 | 0 | - | 4.47 | 52,268 |
| People in History A-Z #3 | 0 | - | 4.48 | 43,910 |
| World Cities A-Z #1 | 0 | - | 4.52 | 60,377 |
| Islands A-Z | 0 | - | 4.47 | 110,985 |
| World Cities A-Z #2 | 0 | - | 4.47 | 52,892 |
| Human Body A-Z | 0 | - | 4.50 | 123,974 |
| Africa A-Z | 0 | - | 4.57 | 44,951 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.65 | 44,959 |
| Name a Valid Year in History | 0 | - | 4.93 | 59,420 |
| History by Letter - D | 0 | - | 4.35 | 131,175 |
| History by Letter - F | 0 | - | 4.20 | 108,644 |
| History by Letter - O | 0 | - | 4.30 | 94,952 |
| History by Letter - P | 0 | - | 4.37 | 102,704 |
| History by Letter - Q | 0 | - | 4.34 | 76,863 |
| History by Letter - R | 0 | - | 4.22 | 116,976 |
| History by Letter - U | 0 | - | 4.18 | 96,001 |
| History by Letter - V | 0 | - | 4.28 | 77,341 |
| History by Letter - Y | 0 | - | 4.24 | 83,653 |
| History by Letter - Z | 0 | - | 4.20 | 74,087 |
| The 3rd and 4th Century | 0 | - | 4.59 | 25,369 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.86 | 75,577 |
| Geography by Letter on the World Map - C | 0 | - | 4.81 | 110,259 |
| Middle East A-Z | 0 | - | 4.46 | 44,343 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.44 | 42,735 |
| Military History A-Z | 0 | - | 4.18 | 20,274 |
| Famous Firsts #1 | 0 | - | 4.42 | 67,032 |
| Time Magazine Person of the Year | 0 | - | 4.55 | 69,577 |
| Invasions | 0 | - | 4.62 | 92,933 |
| Names for Warriors | 0 | - | 4.41 | 35,482 |
| Double Letters A-Z | 0 | - | 4.49 | 26,416 |
| Asian Cities A-Z | 0 | - | 4.51 | 30,786 |
| Animals A-Z #1 | 0 | - | 4.38 | 89,567 |
| Animals A-Z #2 | 0 | - | 4.12 | 64,397 |
| Normandy D-Day Beaches | 0 | - | 4.81 | 38,194 |
| Territory Changes in World War I | 0 | - | 4.88 | 42,901 |
| Same Start and End Letter - History #1 | 0 | - | 4.15 | 24,062 |
| Same Start and End Letter - History #2 | 0 | - | 4.09 | 24,545 |
| People Depicted in Paintings | 0 | - | 4.55 | 42,777 |
| WWII A-Z #1 | 0 | - | 4.79 | 97,880 |
| WWII A-Z #2 | 0 | - | 4.43 | 52,056 |
| Famous Empires in History | 0 | - | 4.81 | 112,709 |
| People in History A-Z #5 | 0 | - | 4.04 | 30,621 |
| People in History A-Z #4 | 0 | - | 4.10 | 21,833 |
| Brand Logos That Start with A | 0 | - | 4.54 | 62,871 |
| Brand Logos That Start With B | 0 | - | 4.45 | 53,960 |
| Brand Logos That Start With M | 0 | - | 4.42 | 55,328 |
| NATO Military Alphabet | 0 | - | 4.98 | 524,552 |
| Disney A-Z | 0 | - | 4.41 | 81,851 |
| Religion A-Z #2 | 0 | - | 4.44 | 35,473 |
| Geography by Letter - A | 0 | - | 4.70 | 201,927 |
| Geography by Letter - B | 0 | - | 4.55 | 175,340 |
| Geography by Letter - H | 0 | - | 4.75 | 142,679 |
| Geography by Letter - C | 0 | - | 4.50 | 150,735 |
| Geography by Letter - D | 0 | - | 4.48 | 143,290 |
| Geography by Letter - E | 0 | - | 4.41 | 140,373 |
| Geography by Letter - I | 0 | - | 4.44 | 116,332 |
| Geography by Letter - K | 0 | - | 4.54 | 112,257 |
| Geography by Letter - L | 0 | - | 4.45 | 141,623 |
| Geography by Letter - M | 0 | - | 4.48 | 112,246 |
| Geography by Letter - N | 0 | - | 4.51 | 121,180 |
| Geography by Letter - P | 0 | - | 4.47 | 169,281 |
| Geography by Letter - R | 0 | - | 4.42 | 122,591 |
| Geography by Letter - S #1 | 0 | - | 4.75 | 132,355 |
| Geography by Letter - U | 0 | - | 4.52 | 135,005 |
| Geography by Letter - W | 0 | - | 4.41 | 109,768 |
| Asian Geography By Letter - K | 0 | - | 4.77 | 56,778 |
| American Football A-Z | 0 | - | 4.21 | 14,099 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 16,553 |
| A to Z: Musical Terms | 0 | - | 4.43 | 39,131 |
| Geography A-Z #2 | 0 | - | 4.46 | 50,932 |
| Switzerland A-Z | 0 | - | 4.44 | 19,197 |
| Canada A-Z | 0 | - | 4.69 | 31,551 |
| Geography A-Z #5 | 0 | - | 4.46 | 35,932 |
| Geography A-Z #1 | 0 | - | 4.55 | 67,541 |
| Movies that Start with G | 0 | - | 4.49 | 66,411 |
| Movies that Start with I | 0 | - | 4.41 | 63,184 |
| Former Countries by Territory Map | 0 | - | 4.96 | 92,782 |
| Empires by Maps | 0 | - | 4.99 | 105,385 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 99,639 |
| Art Works Picture Quiz #2 | 0 | - | 4.48 | 88,834 |
| Art Works Picture Quiz #3 | 0 | - | 4.41 | 42,830 |
| Ultimate 20th Century History Quiz | 0 | - | 4.83 | 49,575 |
| Famous Battles Quiz | 0 | - | 4.26 | 47,511 |
| Name the War Quiz | 0 | - | 4.38 | 195,373 |
| Famous U.S. Generals | 0 | - | 4.26 | 37,581 |
| Religions by Country of Origin Quiz | 0 | - | 4.30 | 74,442 |
| Famous Families #1 | 0 | - | 4.27 | 81,555 |
| The 7 Wonders of the Ancient World | 0 | - | 4.81 | 67,020 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.41 | 43,006 |
| Countries by Military Spending | 0 | - | 4.93 | 167,156 |
| Classic Novels by Plot #2 | 0 | - | 4.83 | 33,765 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.91 | 103,637 |
| Animals that Start with L | 0 | - | 4.45 | 97,297 |
| Animals that Start with P | 0 | - | 4.44 | 82,650 |
| Animals that Start with S | 0 | - | 4.49 | 83,608 |
| Geography by Letter on the World Map - B | 0 | - | 4.50 | 84,310 |
| Geography by Letter on the World Map - A | 0 | - | 4.78 | 99,958 |
| Ethnic Groups A-Z | 0 | - | 4.54 | 40,272 |
| Space Exploration Trivia | 0 | - | 4.37 | 34,194 |
| Brand Logos That Start With D | 0 | - | 4.33 | 55,280 |
| Brand Logos That Start With C | 0 | - | 4.13 | 44,935 |
| Brand Logos That Start With L | 0 | - | 4.40 | 53,801 |
| Brand Logos That Start With S | 0 | - | 4.39 | 51,011 |
| 100 Most Common English Words | 0 | - | 4.89 | 1,235,115 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.41 | 14,443 |
| Companies A-Z | 0 | - | 4.30 | 41,977 |
| Religion A-Z #1 | 0 | - | 4.31 | 60,482 |
| Geography by Letter - G | 0 | - | 4.34 | 120,130 |
| Geography by Letter - F | 0 | - | 4.28 | 131,170 |
| Geography by Letter - J | 0 | - | 4.37 | 117,053 |
| Geography by Letter - O | 0 | - | 4.38 | 123,844 |
| Geography by Letter - V | 0 | - | 4.38 | 114,165 |
| Geography by Letter - Y | 0 | - | 4.37 | 105,895 |
| Geography by Letter - Z | 0 | - | 4.09 | 77,027 |
| Geography by Letter - Q | 0 | - | 4.38 | 65,028 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.17 | 34,219 |
| Video Games A-Z | 0 | - | 4.03 | 36,763 |
| Geography A-Z #3 | 0 | - | 4.22 | 37,844 |
| South America A-Z | 0 | - | 4.13 | 10,419 |
| Movies that Start with A | 0 | - | 4.11 | 59,991 |
| Movies that Start with C | 0 | - | 4.29 | 59,674 |
| Movies that Start with B | 0 | - | 4.36 | 82,714 |
| Movies that Start with D | 0 | - | 4.35 | 66,816 |
| Movies that Start with E | 0 | - | 4.15 | 66,721 |
| Movies that Start with J | 0 | - | 4.22 | 74,196 |
| Movies that Start with L | 0 | - | 4.18 | 58,941 |
| Movies that Start with M | 0 | - | 4.28 | 47,023 |
| Movies that Start with N | 0 | - | 4.03 | 40,178 |
| Movies that Start with P | 0 | - | 4.25 | 52,940 |
| Movies that Start with R | 0 | - | 4.16 | 45,092 |
| Movies that Start with W | 0 | - | 4.06 | 43,279 |
| Movies that Start with T | 0 | - | 4.34 | 47,897 |
| Movies that Start with S | 0 | - | 4.36 | 55,024 |
| Movies that Start with F | 0 | - | 4.15 | 67,212 |
| Music by Letter - F | 0 | - | 4.47 | 25,749 |
| Music by Letter - P | 0 | - | 4.43 | 18,662 |
| Music by Letter - A | 0 | - | 4.61 | 29,966 |
| Google What's the Difference? - History | 0 | - | 4.21 | 44,751 |
| Metals of Antiquity | 0 | - | 4.94 | 89,054 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 42,759 |
| Mythical Creatures Quiz #1 | 0 | - | 4.91 | 683,656 |
| Notable People of WWII | 0 | - | 4.53 | 83,039 |
| WWII Trivia #2 | 0 | - | 4.51 | 99,038 |
| World War I Quiz | 0 | - | 4.78 | 96,076 |
| WWI A-Z | 0 | - | 4.49 | 36,686 |
| Oldest Things | 0 | - | 3.96 | 65,118 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,461 |
| Famous Firsts #2 | 0 | - | 4.00 | 79,583 |
| Famous Firsts #3 - The United States | 0 | - | 4.17 | 13,712 |
| 2013 Year in Review | 0 | - | 4.30 | 40,221 |
| 2014 Year in Review | 0 | - | 4.43 | 31,358 |
| 1970s Decade Quiz | 0 | - | 4.17 | 50,381 |
| 2000s Decade Quiz | 0 | - | 4.22 | 105,077 |
| 1980s Decade Quiz | 0 | - | 4.35 | 73,322 |
| 1990s Decade Quiz | 0 | - | 4.01 | 51,752 |
| Years in History #1 - Multiple Choice | 0 | - | 4.82 | 66,401 |
| Star Wars A-Z | 0 | - | 4.45 | 83,297 |
| Most Common English Verbs - Extreme | 0 | - | 4.95 | 146,540 |
| Top Five Exporting Partners by Country | 0 | - | 4.84 | 64,408 |
| Musical Acts by Letter - J | 0 | - | 4.22 | 75,183 |
| Musical Acts by Letter - M | 0 | - | 4.14 | 89,511 |
| Musical Acts by Letter - N | 0 | - | 4.17 | 66,375 |
| Musical Acts by Letter - P | 0 | - | 4.22 | 63,378 |
| Musical Acts by Letter - R | 0 | - | 4.32 | 80,752 |
| Musical Acts by Letter - T | 0 | - | 4.11 | 64,777 |
| Musical Acts by Letter - A | 0 | - | 4.27 | 79,224 |
| Musical Acts by Letter - B | 0 | - | 4.32 | 70,113 |
