| 19th Century A-Z | 0 | - | 4.77 | 46,707 |
| 18th Century A-Z | 0 | - | 4.54 | 42,619 |
| 15th Century A-Z | 0 | - | 4.49 | 23,381 |
| 17th Century A-Z | 0 | - | 4.78 | 34,152 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 152,667 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 193,835 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,333 |
| Biggest Countries by Area A-Z | 0 | - | 4.95 | 190,645 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 299,294 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 179,304 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 72,087 |
| 14th Century A-Z | 0 | - | 4.40 | 23,657 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 234,648 |
| Name an Official Language A-Z | 0 | - | 4.90 | 174,640 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 124,859 |
| Empires A-Z | 0 | - | 4.51 | 44,781 |
| History by Letter - A | 0 | - | 4.51 | 152,039 |
| History by Letter - B | 0 | - | 4.45 | 171,178 |
| History by Letter - C | 0 | - | 4.69 | 170,205 |
| History by Letter - E | 0 | - | 4.51 | 139,770 |
| History by Letter - G | 0 | - | 4.45 | 121,385 |
| History by Letter - H | 0 | - | 4.45 | 135,810 |
| History by Letter - J | 0 | - | 4.51 | 153,161 |
| History by Letter - N | 0 | - | 4.44 | 103,346 |
| History by Letter - S | 0 | - | 4.47 | 93,631 |
| History by Letter - W | 0 | - | 4.45 | 108,674 |
| History by Letter - M | 0 | - | 4.54 | 119,043 |
| History by Letter - K | 0 | - | 4.50 | 100,781 |
| History by Letter - L | 0 | - | 4.49 | 111,453 |
| History by Letter - I | 0 | - | 4.46 | 103,630 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 128,519 |
| Geography by Letter - T | 0 | - | 4.84 | 152,249 |
| People in History A-Z #1 | 0 | - | 4.63 | 98,547 |
| People in History A-Z #2 | 0 | - | 4.47 | 54,781 |
| People in History A-Z #3 | 0 | - | 4.44 | 45,936 |
| World Cities A-Z by Clue #1 | 0 | - | 4.54 | 65,401 |
| Islands A-Z | 0 | - | 4.46 | 116,688 |
| World Cities A-Z by Clue #2 | 0 | - | 4.44 | 56,951 |
| Human Body A-Z | 0 | - | 4.51 | 128,231 |
| Asian Cities A-Z by Clue | 0 | - | 4.53 | 33,792 |
| Animals A-Z #1 | 0 | - | 4.41 | 92,773 |
| Africa A-Z | 0 | - | 4.57 | 46,354 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.60 | 47,456 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,315 |
| History by Letter - D | 0 | - | 4.39 | 136,829 |
| History by Letter - F | 0 | - | 4.18 | 113,646 |
| History by Letter - O | 0 | - | 4.31 | 99,006 |
| History by Letter - P | 0 | - | 4.38 | 107,290 |
| History by Letter - Q | 0 | - | 4.34 | 79,941 |
| History by Letter - R | 0 | - | 4.26 | 121,599 |
| History by Letter - T | 0 | - | 4.39 | 104,830 |
| History by Letter - U | 0 | - | 4.19 | 100,190 |
| History by Letter - V | 0 | - | 4.27 | 80,329 |
| History by Letter - Y | 0 | - | 4.27 | 86,903 |
| History by Letter - Z | 0 | - | 4.18 | 76,710 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,103 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 81,194 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 106,823 |
| Middle East A-Z | 0 | - | 4.47 | 45,756 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,132 |
| Military History A-Z | 0 | - | 4.20 | 21,032 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,508 |
| Countries That Were Invaded | 0 | - | 4.54 | 96,879 |
| People in History A-Z #5 | 0 | - | 4.09 | 31,782 |
| Double Letters A-Z | 0 | - | 4.51 | 27,060 |
| Animals A-Z #2 | 0 | - | 4.11 | 66,026 |
| Canada A-Z | 0 | - | 4.73 | 32,634 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,085 |
| Territory Changes in World War I | 0 | - | 4.86 | 46,190 |
| Same Start and End Letter - History #1 | 0 | - | 4.16 | 24,656 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,521 |
| People Depicted in Paintings | 0 | - | 4.54 | 44,373 |
| WWII A-Z #1 | 0 | - | 4.80 | 102,327 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,294 |
| People in History A-Z #4 | 0 | - | 4.10 | 22,903 |
| NATO Military Alphabet | 0 | - | 4.98 | 553,735 |
| 12 x 12 Multiplication Table in 2 Minutes | 0 | - | 4.81 | 797,594 |
| Geography by Letter - A | 0 | - | 4.74 | 209,959 |
| Geography by Letter - B | 0 | - | 4.56 | 183,131 |
| Geography by Letter - H | 0 | - | 4.69 | 149,186 |
| Geography by Letter - C | 0 | - | 4.47 | 157,449 |
| Geography by Letter - D | 0 | - | 4.50 | 149,386 |
| Geography by Letter - E | 0 | - | 4.42 | 146,557 |
| Geography by Letter - I | 0 | - | 4.42 | 121,112 |
| Geography by Letter - K | 0 | - | 4.53 | 117,245 |
| Geography by Letter - L | 0 | - | 4.43 | 147,523 |
| Geography by Letter - M | 0 | - | 4.49 | 117,532 |
| Geography by Letter - N | 0 | - | 4.51 | 126,156 |
| Geography by Letter - P | 0 | - | 4.47 | 175,047 |
| Geography by Letter - R | 0 | - | 4.43 | 130,216 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 139,328 |
| Geography by Letter - U | 0 | - | 4.54 | 141,955 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 57,952 |
| American Football A-Z | 0 | - | 4.26 | 14,471 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 16,985 |
| A to Z: Musical Terms | 0 | - | 4.43 | 40,991 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,667 |
| Switzerland A-Z | 0 | - | 4.45 | 25,497 |
| Geography A-Z #5 | 0 | - | 4.47 | 37,174 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,311 |
| Movies that Start with G | 0 | - | 4.48 | 68,224 |
| Movies that Start with I | 0 | - | 4.41 | 64,865 |
| Brand Logos That Start with A | 0 | - | 4.51 | 69,168 |
| Brand Logos That Start With B | 0 | - | 4.41 | 59,127 |
| Brand Logos That Start With M | 0 | - | 4.45 | 61,683 |
| Former Countries by Territory Map | 0 | - | 4.96 | 101,391 |
| Empires by Maps | 0 | - | 4.98 | 118,267 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,421 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,590 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,522 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,167 |
| WWI... or WWII? | 0 | - | 4.85 | 140,524 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,790 |
| Name the War | 0 | - | 4.37 | 200,693 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,398 |
| Famous Firsts #1 | 0 | - | 4.40 | 68,812 |
| Famous Families #1 | 0 | - | 4.20 | 83,380 |
| Names for Warriors | 0 | - | 4.40 | 36,782 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,056 |
| 2010s Decade Quiz | 0 | - | 4.53 | 100,832 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,188 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,318 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,576 |
| Countries by Military Spending | 0 | - | 4.93 | 176,317 |
| Classic Novels by Plot #2 | 0 | - | 4.87 | 37,459 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 119,620 |
| Animals that Start with L | 0 | - | 4.47 | 101,213 |
| Animals that Start with P | 0 | - | 4.45 | 85,607 |
| Animals that Start with S | 0 | - | 4.49 | 86,771 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 89,571 |
| Geography by Letter on the World Map - C | 0 | - | 4.78 | 116,519 |
| Ethnic Groups A-Z | 0 | - | 4.50 | 42,027 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,161 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,304,006 |
| Disney A-Z | 0 | - | 4.37 | 86,085 |
| Literature by Letter - A | 0 | - | 4.23 | 31,746 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,062 |
| Companies A-Z | 0 | - | 4.30 | 42,602 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,467 |
| Religion A-Z #2 | 0 | - | 4.40 | 36,795 |
| Geography by Letter - G | 0 | - | 4.35 | 125,389 |
| Geography by Letter - F | 0 | - | 4.27 | 136,959 |
| Geography by Letter - J | 0 | - | 4.34 | 122,082 |
| Geography by Letter - O | 0 | - | 4.37 | 128,904 |
| Geography by Letter - V | 0 | - | 4.39 | 120,552 |
| Geography by Letter - W | 0 | - | 4.39 | 114,106 |
| Geography by Letter - Y | 0 | - | 4.39 | 110,576 |
| Geography by Letter - Z | 0 | - | 4.11 | 80,953 |
| Geography by Letter - Q | 0 | - | 4.38 | 68,797 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.18 | 35,101 |
| Video Games A-Z | 0 | - | 4.08 | 38,661 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,060 |
| South America A-Z | 0 | - | 4.13 | 10,835 |
| Movies that Start with A | 0 | - | 4.13 | 61,613 |
| Movies that Start with C | 0 | - | 4.30 | 61,553 |
| Movies that Start with B | 0 | - | 4.35 | 84,881 |
| Movies that Start with D | 0 | - | 4.34 | 68,204 |
| Movies that Start with E | 0 | - | 4.13 | 68,151 |
| Movies that Start with J | 0 | - | 4.18 | 75,896 |
| Movies that Start with L | 0 | - | 4.16 | 60,205 |
| Movies that Start with M | 0 | - | 4.28 | 48,041 |
| Movies that Start with N | 0 | - | 4.02 | 41,092 |
| Movies that Start with P | 0 | - | 4.25 | 53,977 |
| Movies that Start with R | 0 | - | 4.17 | 46,421 |
| Movies that Start with W | 0 | - | 4.07 | 44,114 |
| Movies that Start with T | 0 | - | 4.33 | 49,091 |
| Movies that Start with S | 0 | - | 4.35 | 56,241 |
| Movies that Start with F | 0 | - | 4.13 | 68,620 |
| Music by Letter - F | 0 | - | 4.48 | 26,786 |
| Music by Letter - A | 0 | - | 4.61 | 31,159 |
| Brand Logos That Start With D | 0 | - | 4.37 | 60,594 |
| Brand Logos That Start With C | 0 | - | 4.17 | 48,971 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,123 |
| Brand Logos That Start With S | 0 | - | 4.37 | 56,610 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,003 |
| Metals of Antiquity | 0 | - | 4.94 | 92,842 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,112 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 704,103 |
| Notable People of WWII | 0 | - | 4.53 | 85,299 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,385 |
| World War I Quiz | 0 | - | 4.78 | 100,199 |
| WWI A-Z | 0 | - | 4.50 | 38,005 |
| Oldest Things | 0 | - | 3.92 | 65,585 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,757 |
| Famous Firsts #2 | 0 | - | 4.00 | 80,834 |
| Famous Firsts #3 - The United States | 0 | - | 4.17 | 14,484 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,309 |
| 2000s Decade Quiz | 0 | - | 4.23 | 118,365 |
| 1980s Decade Quiz | 0 | - | 4.38 | 76,320 |
| 1990s Decade Quiz | 0 | - | 4.01 | 54,521 |
| 1850s Decade Quiz | 0 | - | 4.42 | 34,956 |
| 1790s Decade Quiz | 0 | - | 4.55 | 33,402 |
| 1800s Decade Quiz | 0 | - | 4.47 | 31,678 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 69,627 |
| Star Wars A-Z | 0 | - | 4.46 | 87,103 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,705 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 66,822 |
| Musical Acts by Letter - J | 0 | - | 4.20 | 77,139 |
| Musical Acts by Letter - M | 0 | - | 4.14 | 92,902 |
| Musical Acts by Letter - N | 0 | - | 4.17 | 68,050 |
