| 19th Century A-Z | 0 | - | 4.82 | 34,644 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 140,431 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 182,619 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 162,716 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 177,798 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 288,314 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 168,802 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.82 | 66,288 |
| People in History A-Z #1 | 0 | - | 4.65 | 91,359 |
| People in History A-Z #2 | 0 | - | 4.46 | 50,449 |
| People in History A-Z #3 | 0 | - | 4.47 | 42,505 |
| Name an Official Language A-Z | 0 | - | 4.92 | 136,301 |
| 20th Century A-Z | 0 | - | 4.48 | 38,950 |
| 18th Century A-Z | 0 | - | 4.60 | 31,755 |
| History by Letter - A | 0 | - | 4.50 | 139,558 |
| History by Letter - B | 0 | - | 4.48 | 157,225 |
| History by Letter - C | 0 | - | 4.70 | 154,899 |
| History by Letter - E | 0 | - | 4.49 | 128,220 |
| History by Letter - G | 0 | - | 4.48 | 111,381 |
| History by Letter - H | 0 | - | 4.42 | 124,356 |
| History by Letter - J | 0 | - | 4.49 | 141,020 |
| History by Letter - N | 0 | - | 4.44 | 94,859 |
| History by Letter - S | 0 | - | 4.46 | 85,608 |
| History by Letter - W | 0 | - | 4.45 | 99,320 |
| History by Letter - M | 0 | - | 4.54 | 109,841 |
| History by Letter - K | 0 | - | 4.48 | 92,763 |
| History by Letter - L | 0 | - | 4.47 | 102,967 |
| History by Letter - I | 0 | - | 4.48 | 95,589 |
| A to Z: Musical Terms | 0 | - | 4.44 | 37,910 |
| Geography A-Z #2 | 0 | - | 4.46 | 49,595 |
| Geography A-Z #5 | 0 | - | 4.42 | 34,953 |
| Geography A-Z #1 | 0 | - | 4.55 | 66,153 |
| Countries that Start with a Vowel | 0 | - | 4.98 | 109,190 |
| Geography by Letter - T | 0 | - | 4.82 | 124,721 |
| 16th Century A-Z | 0 | - | 4.54 | 15,951 |
| History by Letter - D | 0 | - | 4.34 | 126,592 |
| History by Letter - F | 0 | - | 4.18 | 104,818 |
| History by Letter - O | 0 | - | 4.30 | 91,820 |
| History by Letter - P | 0 | - | 4.37 | 99,053 |
| History by Letter - Q | 0 | - | 4.35 | 74,444 |
| History by Letter - R | 0 | - | 4.22 | 113,369 |
| History by Letter - T | 0 | - | 4.40 | 97,115 |
| History by Letter - U | 0 | - | 4.19 | 92,999 |
| History by Letter - V | 0 | - | 4.27 | 75,029 |
| History by Letter - Y | 0 | - | 4.28 | 81,336 |
| History by Letter - Z | 0 | - | 4.20 | 72,078 |
| The 3rd and 4th Century | 0 | - | 4.53 | 20,250 |
| Disney A-Z | 0 | - | 4.40 | 78,997 |
| Companies A-Z | 0 | - | 4.32 | 41,507 |
| Religion A-Z #1 | 0 | - | 4.31 | 58,910 |
| Religion A-Z #2 | 0 | - | 4.50 | 26,484 |
| World Cities A-Z #1 | 0 | - | 4.54 | 59,183 |
| Islands A-Z | 0 | - | 4.46 | 106,511 |
| World Cities A-Z #2 | 0 | - | 4.46 | 51,829 |
| Human Body A-Z | 0 | - | 4.49 | 109,193 |
| Video Games A-Z | 0 | - | 4.04 | 35,579 |
| Geography A-Z #3 | 0 | - | 4.21 | 36,884 |
| Africa A-Z | 0 | - | 4.54 | 43,951 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.66 | 42,973 |
| Ethnic Groups A-Z | 0 | - | 4.58 | 38,519 |
| People in History A-Z #5 | 0 | - | 4.08 | 30,077 |
| People in History A-Z #4 | 0 | - | 4.13 | 21,416 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.87 | 70,195 |
| Geography by Letter on the World Map - A | 0 | - | 4.82 | 93,501 |
| Geography by Letter on the World Map - C | 0 | - | 4.81 | 104,173 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.44 | 41,613 |
| Famous Empires in History | 0 | - | 4.83 | 105,294 |
| Famous Firsts #1 | 0 | - | 4.42 | 65,997 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 66,877 |
| Invasions | 0 | - | 4.70 | 90,160 |
| 15th Century A-Z | 0 | - | 4.35 | 15,112 |
| 14th Century A-Z | 0 | - | 4.32 | 15,436 |
| Military History A-Z | 0 | - | 4.21 | 19,688 |
| Double Letters A-Z | 0 | - | 4.49 | 25,939 |
| Asian Cities A-Z | 0 | - | 4.51 | 30,299 |
| Animals A-Z #1 | 0 | - | 4.37 | 86,953 |
| Animals A-Z #2 | 0 | - | 4.12 | 63,246 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 216,076 |
| Same Start and End Letter - History #1 | 0 | - | 4.12 | 23,509 |
| Same Start and End Letter - History #2 | 0 | - | 4.08 | 23,486 |
| A to Z: Musical Terms #2 | 0 | - | 4.12 | 9,877 |
| Geography A-Z #4 | 0 | - | 4.36 | 24,097 |
| People Depicted in Paintings | 0 | - | 4.56 | 41,448 |
| Normandy D-Day Beaches | 0 | - | 4.81 | 37,000 |
| Territory Changes in World War I | 0 | - | 4.87 | 40,799 |
| Brand Logos That Start with A | 0 | - | 4.52 | 57,517 |
| Brand Logos That Start With B | 0 | - | 4.47 | 49,442 |
| Brand Logos That Start With M | 0 | - | 4.42 | 50,085 |
| NATO Military Alphabet | 0 | - | 4.98 | 505,297 |
| Geography by Letter - A | 0 | - | 4.66 | 194,074 |
| Geography by Letter - B | 0 | - | 4.55 | 167,049 |
| Geography by Letter - H | 0 | - | 4.75 | 135,410 |
| Geography by Letter - C | 0 | - | 4.50 | 143,460 |
| Geography by Letter - D | 0 | - | 4.47 | 136,881 |
| Geography by Letter - I | 0 | - | 4.43 | 111,261 |
| Geography by Letter - K | 0 | - | 4.54 | 106,967 |
| Geography by Letter - L | 0 | - | 4.45 | 136,017 |
| Geography by Letter - M | 0 | - | 4.48 | 106,478 |
| Geography by Letter - N | 0 | - | 4.53 | 115,729 |
| Geography by Letter - P | 0 | - | 4.46 | 163,060 |
| Geography by Letter - S #1 | 0 | - | 4.79 | 116,766 |
| Geography by Letter - U | 0 | - | 4.54 | 119,045 |
| Geography by Letter - W | 0 | - | 4.42 | 97,201 |
| Asian Geography By Letter - K | 0 | - | 4.77 | 55,738 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 109,789 |
| Movies that Start with G | 0 | - | 4.48 | 64,890 |
| Movies that Start with I | 0 | - | 4.41 | 61,826 |
| Former Countries by Territory Map | 0 | - | 4.96 | 86,963 |
| Empires by Maps | 0 | - | 4.98 | 96,382 |
| Ultimate 20th Century History Quiz | 0 | - | 4.87 | 46,937 |
| Famous Battles Quiz | 0 | - | 4.25 | 46,829 |
| Name the War Quiz | 0 | - | 4.39 | 191,132 |
| Famous U.S. Generals | 0 | - | 4.25 | 37,069 |
| Religions by Country of Origin Quiz | 0 | - | 4.29 | 72,969 |
| Famous Families #1 | 0 | - | 4.27 | 79,987 |
| Names for Warriors | 0 | - | 4.40 | 34,720 |
| Famous Firsts #2 | 0 | - | 4.01 | 78,737 |
| Countries by Military Spending | 0 | - | 4.93 | 161,176 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.90 | 98,652 |
| American Football A-Z | 0 | - | 4.27 | 13,814 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 16,249 |
| Art Works Picture Quiz #1 | 0 | - | 4.50 | 97,216 |
| Art Works Picture Quiz #2 | 0 | - | 4.46 | 86,657 |
| WWII A-Z #1 | 0 | - | 4.79 | 94,407 |
| WWII A-Z #2 | 0 | - | 4.47 | 50,430 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.46 | 32,472 |
| 100 Most Common English Words | 0 | - | 4.90 | 1,183,443 |
| Animals that Start with L | 0 | - | 4.44 | 94,965 |
| Animals that Start with P | 0 | - | 4.42 | 80,414 |
| Animals that Start with S | 0 | - | 4.49 | 81,079 |
| Geography by Letter on the World Map - B | 0 | - | 4.49 | 79,517 |
| Canada A-Z | 0 | - | 4.70 | 30,763 |
| Space Exploration Trivia | 0 | - | 4.36 | 33,623 |
| 17th Century A-Z | 0 | - | 4.61 | 24,234 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 13,587 |
| Brand Logos That Start With D | 0 | - | 4.35 | 50,720 |
| Brand Logos That Start With C | 0 | - | 4.14 | 41,460 |
| Brand Logos That Start With L | 0 | - | 4.36 | 48,808 |
| Brand Logos That Start With S | 0 | - | 4.37 | 46,212 |
| Classic Novels by Plot #2 | 0 | - | 4.81 | 31,399 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.41 | 14,020 |
| Geography by Letter - E | 0 | - | 4.40 | 134,582 |
| Geography by Letter - G | 0 | - | 4.36 | 114,546 |
| Geography by Letter - F | 0 | - | 4.27 | 125,241 |
| Geography by Letter - J | 0 | - | 4.36 | 111,848 |
| Geography by Letter - O | 0 | - | 4.38 | 117,926 |
| Geography by Letter - R | 0 | - | 4.40 | 106,187 |
| Geography by Letter - V | 0 | - | 4.38 | 97,071 |
| Geography by Letter - Y | 0 | - | 4.37 | 92,351 |
| Geography by Letter - Z | 0 | - | 4.04 | 64,041 |
| Geography by Letter - Q | 0 | - | 4.34 | 57,999 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.20 | 33,394 |
| Movies that Start with A | 0 | - | 4.11 | 58,668 |
| Movies that Start with C | 0 | - | 4.30 | 58,092 |
| Movies that Start with B | 0 | - | 4.36 | 80,839 |
| Movies that Start with D | 0 | - | 4.35 | 65,642 |
| Movies that Start with E | 0 | - | 4.16 | 65,546 |
| Movies that Start with J | 0 | - | 4.22 | 72,758 |
| Movies that Start with L | 0 | - | 4.17 | 57,907 |
| Movies that Start with M | 0 | - | 4.27 | 46,152 |
| Movies that Start with N | 0 | - | 4.06 | 39,365 |
| Movies that Start with P | 0 | - | 4.25 | 52,080 |
| Movies that Start with R | 0 | - | 4.13 | 43,959 |
| Movies that Start with W | 0 | - | 4.06 | 42,579 |
| Movies that Start with T | 0 | - | 4.37 | 46,954 |
| Movies that Start with S | 0 | - | 4.37 | 53,951 |
| Movies that Start with F | 0 | - | 4.15 | 66,052 |
| Music by Letter - F | 0 | - | 4.45 | 24,954 |
| Music by Letter - P | 0 | - | 4.41 | 18,005 |
| Music by Letter - A | 0 | - | 4.60 | 28,978 |
| Metals of Antiquity | 0 | - | 4.93 | 85,986 |
| Cradles of Civilization | 0 | - | 4.41 | 32,832 |
| Materials From History #1 | 0 | - | 4.54 | 45,364 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 40,320 |
| Mythical Creatures Quiz #1 | 0 | - | 4.91 | 660,648 |
| WWI... or WWII? | 0 | - | 4.84 | 125,304 |
| Oldest Things | 0 | - | 3.96 | 64,717 |
| Famous Homes - Who Lived There? | 0 | - | 4.07 | 26,215 |
| Biggest Nations and Empires Ever | 0 | - | 4.55 | 134,800 |
| Famous Explorers | 0 | - | 4.65 | 32,904 |
| Answers by Time Period | 0 | - | 4.50 | 42,934 |
| Territorial Accessions | 0 | - | 4.43 | 32,394 |
| Famous Firsts #3 - The United States | 0 | - | 4.17 | 13,355 |
| Years in History #1 - Multiple Choice | 0 | - | 4.84 | 63,636 |
| Most Common English Verbs - Extreme | 0 | - | 4.95 | 138,748 |
| Top Five Exporting Partners by Country | 0 | - | 4.85 | 62,514 |
| The Americas Geography by Letter - B | 0 | - | 4.51 | 49,079 |
| The Americas Geography by Letter - S | 0 | - | 4.56 | 41,695 |
| Middle East A-Z | 0 | - | 4.46 | 43,333 |
| South America A-Z | 0 | - | 4.11 | 10,091 |
| Google What's the Difference? - History | 0 | - | 4.21 | 43,749 |
| Art Works Picture Quiz #3 | 0 | - | 4.39 | 41,469 |
| Notable People of WWII | 0 | - | 4.52 | 80,645 |
| WWII Trivia #2 | 0 | - | 4.53 | 96,166 |
| World War I Quiz | 0 | - | 4.79 | 93,609 |
| WWI A-Z | 0 | - | 4.48 | 35,669 |
| Most Important People in History | 0 | - | 3.97 | 46,765 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.53 | 27,477 |
| People in History by Wikipedia Descriptions #4 | 0 | - | 4.50 | 24,145 |
| Top Arms Exporting Countries | 0 | - | 4.95 | 77,244 |
