| 19th Century A-Z | 0 | - | 4.77 | 47,189 |
| 18th Century A-Z | 0 | - | 4.54 | 43,078 |
| 16th Century A-Z | 0 | - | 4.58 | 24,826 |
| 15th Century A-Z | 0 | - | 4.49 | 23,865 |
| 14th Century A-Z | 0 | - | 4.41 | 24,288 |
| 17th Century A-Z | 0 | - | 4.78 | 34,566 |
| Southernmost Countries A-Z | 0 | - | 4.94 | 153,172 |
| Northernmost Countries A-Z | 0 | - | 4.99 | 195,059 |
| Least Populous Countries A-Z | 0 | - | 4.99 | 169,836 |
| Biggest Countries by Area A-Z | 0 | - | 4.96 | 191,676 |
| Most Populous Countries A-Z | 0 | - | 4.98 | 300,161 |
| Countries A-Z by Neighbor | 0 | - | 5.00 | 179,946 |
| Countries with the Greatest Elevation A-Z | 0 | - | 4.83 | 72,577 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 236,217 |
| Name an Official Language A-Z | 0 | - | 4.91 | 175,631 |
| Countries with the Most Borders A-Z | 0 | - | 4.98 | 125,125 |
| Empires A-Z | 0 | - | 4.51 | 45,081 |
| History by Letter - A | 0 | - | 4.51 | 152,776 |
| History by Letter - B | 0 | - | 4.45 | 172,004 |
| History by Letter - C | 0 | - | 4.70 | 171,283 |
| History by Letter - E | 0 | - | 4.51 | 140,461 |
| History by Letter - G | 0 | - | 4.46 | 121,970 |
| History by Letter - H | 0 | - | 4.45 | 136,428 |
| History by Letter - J | 0 | - | 4.51 | 153,881 |
| History by Letter - N | 0 | - | 4.45 | 103,988 |
| History by Letter - S | 0 | - | 4.47 | 94,283 |
| History by Letter - W | 0 | - | 4.45 | 109,227 |
| History by Letter - M | 0 | - | 4.54 | 119,742 |
| History by Letter - K | 0 | - | 4.50 | 101,267 |
| History by Letter - L | 0 | - | 4.50 | 111,997 |
| History by Letter - I | 0 | - | 4.46 | 104,116 |
| Countries that Start with a Vowel | 0 | - | 4.99 | 129,895 |
| Geography by Letter - T | 0 | - | 4.84 | 153,578 |
| People in History A-Z #1 | 0 | - | 4.61 | 98,914 |
| People in History A-Z #2 | 0 | - | 4.47 | 55,040 |
| People in History A-Z #3 | 0 | - | 4.44 | 46,129 |
| World Cities A-Z by Clue #1 | 0 | - | 4.50 | 67,852 |
| Islands A-Z | 0 | - | 4.46 | 119,299 |
| Human Body A-Z | 0 | - | 4.51 | 129,006 |
| Asian Cities A-Z by Clue | 0 | - | 4.52 | 35,365 |
| Animals A-Z #1 | 0 | - | 4.41 | 93,151 |
| Africa A-Z | 0 | - | 4.57 | 46,559 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.68 | 57,526 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,976 |
| History by Letter - D | 0 | - | 4.39 | 137,436 |
| History by Letter - F | 0 | - | 4.18 | 114,137 |
| History by Letter - O | 0 | - | 4.32 | 99,432 |
| History by Letter - P | 0 | - | 4.39 | 107,769 |
| History by Letter - Q | 0 | - | 4.34 | 80,271 |
| History by Letter - R | 0 | - | 4.26 | 122,101 |
| History by Letter - T | 0 | - | 4.39 | 105,203 |
| History by Letter - U | 0 | - | 4.19 | 100,720 |
| History by Letter - V | 0 | - | 4.27 | 80,702 |
| History by Letter - Y | 0 | - | 4.27 | 87,213 |
| History by Letter - Z | 0 | - | 4.20 | 76,987 |
| The 3rd and 4th Century | 0 | - | 4.60 | 27,211 |
| Geography by Letter on the World Map - A-Z | 0 | - | 4.89 | 81,998 |
| Geography by Letter on the World Map - A | 0 | - | 4.81 | 107,697 |
| Middle East A-Z | 0 | - | 4.47 | 45,964 |
| World Cities Based on Location A-Z - #1 | 0 | - | 4.45 | 44,294 |
| Military History A-Z | 0 | - | 4.20 | 21,127 |
| Time Magazine Person of the Year | 0 | - | 4.53 | 73,951 |
| Countries That Were Invaded | 0 | - | 4.55 | 97,289 |
| People in History A-Z #5 | 0 | - | 4.09 | 31,911 |
| Double Letters A-Z | 0 | - | 4.51 | 27,133 |
| World Cities A-Z by Clue #2 | 0 | - | 4.40 | 58,822 |
| Animals A-Z #2 | 0 | - | 4.12 | 66,229 |
| Canada A-Z | 0 | - | 4.73 | 32,761 |
| Normandy D-Day Beaches | 0 | - | 4.83 | 40,353 |
| Territory Changes in World War I | 0 | - | 4.87 | 46,625 |
| Same Start and End Letter - History #1 | 0 | - | 4.17 | 24,722 |
| Same Start and End Letter - History #2 | 0 | - | 4.13 | 25,636 |
| People Depicted in Paintings | 0 | - | 4.54 | 44,570 |
| WWII A-Z #1 | 0 | - | 4.78 | 102,820 |
| WWII A-Z #2 | 0 | - | 4.44 | 54,572 |
| People in History A-Z #4 | 0 | - | 4.10 | 23,001 |
| NATO Military Alphabet | 0 | - | 4.98 | 558,084 |
| 12 x 12 Multiplication Table in 2 Minutes | 0 | - | 4.81 | 801,050 |
| Religion A-Z #2 | 0 | - | 4.41 | 36,963 |
| Geography by Letter - A | 0 | - | 4.74 | 211,352 |
| Geography by Letter - B | 0 | - | 4.56 | 184,405 |
| Geography by Letter - H | 0 | - | 4.69 | 150,137 |
| Geography by Letter - C | 0 | - | 4.47 | 158,499 |
| Geography by Letter - D | 0 | - | 4.50 | 150,363 |
| Geography by Letter - E | 0 | - | 4.42 | 147,440 |
| Geography by Letter - I | 0 | - | 4.42 | 121,863 |
| Geography by Letter - K | 0 | - | 4.53 | 117,973 |
| Geography by Letter - L | 0 | - | 4.43 | 148,350 |
| Geography by Letter - M | 0 | - | 4.49 | 118,484 |
| Geography by Letter - N | 0 | - | 4.51 | 126,912 |
| Geography by Letter - P | 0 | - | 4.47 | 175,871 |
| Geography by Letter - R | 0 | - | 4.43 | 131,424 |
| Geography by Letter - S #1 | 0 | - | 4.74 | 140,385 |
| Geography by Letter - U | 0 | - | 4.53 | 142,883 |
| Asian Geography By Letter - K | 0 | - | 4.74 | 58,105 |
| Geography Containing the Letter X | 0 | - | 4.42 | 34,599 |
| American Football A-Z | 0 | - | 4.26 | 14,501 |
| MLB Baseball A-Z #2 | 0 | - | 4.11 | 17,078 |
| A to Z: Musical Terms | 0 | - | 4.43 | 41,272 |
| Geography A-Z #2 | 0 | - | 4.46 | 52,851 |
| Switzerland A-Z | 0 | - | 4.45 | 25,612 |
| Geography A-Z #5 | 0 | - | 4.47 | 37,313 |
| Geography A-Z #1 | 0 | - | 4.56 | 69,520 |
| Movies that Start with G | 0 | - | 4.49 | 68,459 |
| Movies that Start with I | 0 | - | 4.41 | 65,099 |
| Brand Logos That Start with A | 0 | - | 4.52 | 70,011 |
| Brand Logos That Start With M | 0 | - | 4.45 | 62,482 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,470 |
| Empires by Maps | 0 | - | 4.98 | 119,859 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,902 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 105,120 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,676 |
| Ultimate 20th Century History Quiz | 0 | - | 4.86 | 53,570 |
| WWI... or WWII? | 0 | - | 4.85 | 141,798 |
| Famous Battles Quiz | 0 | - | 4.21 | 48,948 |
| Name the War | 0 | - | 4.37 | 201,406 |
| Famous U.S. Generals | 0 | - | 4.27 | 38,507 |
| Famous Firsts #1 | 0 | - | 4.40 | 68,994 |
| Famous Families #1 | 0 | - | 4.20 | 83,550 |
| Names for Warriors | 0 | - | 4.40 | 36,895 |
| Famous Firsts #2 | 0 | - | 4.01 | 80,984 |
| The 7 Wonders of the Ancient World | 0 | - | 4.85 | 82,312 |
| 2010s Decade Quiz | 0 | - | 4.53 | 102,158 |
| People in History by Wikipedia Descriptions #1 | 0 | - | 4.42 | 44,327 |
| People in History by Wikipedia Descriptions #2 | 0 | - | 4.42 | 39,444 |
| People in History by Wikipedia Descriptions #3 | 0 | - | 4.50 | 36,663 |
| Countries by Military Spending | 0 | - | 4.93 | 177,285 |
| Classic Novels by Plot #2 | 0 | - | 4.87 | 37,854 |
| 12x12 Multiplication - The Whopper | 0 | - | 4.92 | 120,348 |
| Animals that Start with L | 0 | - | 4.47 | 101,765 |
| Animals that Start with P | 0 | - | 4.45 | 86,005 |
| Animals that Start with S | 0 | - | 4.49 | 87,210 |
| Geography by Letter on the World Map - B | 0 | - | 4.52 | 90,205 |
| Geography by Letter on the World Map - C | 0 | - | 4.78 | 117,280 |
| Ethnic Groups A-Z | 0 | - | 4.51 | 42,213 |
| Space Exploration Trivia | 0 | - | 4.38 | 35,318 |
| Famous Generals - Non U.S. | 0 | - | 4.59 | 15,114 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,313,130 |
| Disney A-Z | 0 | - | 4.37 | 86,943 |
| Literature by Letter - A | 0 | - | 4.23 | 31,902 |
| Literature by Letter - Q, X, Y, and Z | 0 | - | 4.42 | 15,152 |
| Companies A-Z | 0 | - | 4.30 | 42,678 |
| Religion A-Z #1 | 0 | - | 4.32 | 61,595 |
| Geography by Letter - G | 0 | - | 4.35 | 126,143 |
| Geography by Letter - F | 0 | - | 4.27 | 137,707 |
| Geography by Letter - J | 0 | - | 4.34 | 122,768 |
| Geography by Letter - O | 0 | - | 4.37 | 129,611 |
| Geography by Letter - V | 0 | - | 4.39 | 121,584 |
| Geography by Letter - W | 0 | - | 4.39 | 114,721 |
| Geography by Letter - Y | 0 | - | 4.39 | 111,214 |
| Geography by Letter - Z | 0 | - | 4.11 | 81,523 |
| Geography by Letter - Q | 0 | - | 4.38 | 69,365 |
| Same Start and End Letter - Geography #1 | 0 | - | 4.15 | 35,220 |
| Video Games A-Z | 0 | - | 4.08 | 38,910 |
| Geography A-Z #3 | 0 | - | 4.22 | 39,201 |
| South America A-Z | 0 | - | 4.13 | 10,888 |
| Movies that Start with A | 0 | - | 4.13 | 61,817 |
| Movies that Start with C | 0 | - | 4.30 | 61,782 |
| Movies that Start with B | 0 | - | 4.36 | 85,141 |
| Movies that Start with D | 0 | - | 4.34 | 68,385 |
| Movies that Start with E | 0 | - | 4.13 | 68,313 |
| Movies that Start with J | 0 | - | 4.18 | 76,096 |
| Movies that Start with L | 0 | - | 4.16 | 60,369 |
| Movies that Start with M | 0 | - | 4.28 | 48,183 |
| Movies that Start with N | 0 | - | 4.02 | 41,218 |
| Movies that Start with P | 0 | - | 4.25 | 54,118 |
| Movies that Start with R | 0 | - | 4.17 | 46,594 |
| Movies that Start with W | 0 | - | 4.07 | 44,230 |
| Movies that Start with T | 0 | - | 4.34 | 49,250 |
| Movies that Start with S | 0 | - | 4.35 | 56,420 |
| Movies that Start with F | 0 | - | 4.13 | 68,794 |
| Music by Letter - F | 0 | - | 4.48 | 26,960 |
| Music by Letter - A | 0 | - | 4.61 | 31,331 |
| Brand Logos That Start With B | 0 | - | 4.38 | 59,779 |
| Brand Logos That Start With D | 0 | - | 4.37 | 61,322 |
| Brand Logos That Start With C | 0 | - | 4.17 | 49,477 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,877 |
| Brand Logos That Start With S | 0 | - | 4.37 | 57,353 |
| Google What's the Difference? - History | 0 | - | 4.20 | 46,182 |
| Metals of Antiquity | 0 | - | 4.94 | 93,269 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 46,552 |
| Mythical Creatures Quiz #1 | 0 | - | 4.92 | 706,466 |
| Notable People of WWII | 0 | - | 4.53 | 85,572 |
| WWII Trivia #2 | 0 | - | 4.52 | 103,841 |
| World War I Quiz | 0 | - | 4.78 | 101,112 |
| WWI A-Z | 0 | - | 4.50 | 38,244 |
| Oldest Things | 0 | - | 3.92 | 65,638 |
| Famous Homes - Who Lived There? | 0 | - | 4.09 | 26,808 |
| Famous Firsts #3 - The United States | 0 | - | 4.19 | 14,622 |
| 1970s Decade Quiz | 0 | - | 4.20 | 52,827 |
| 2000s Decade Quiz | 0 | - | 4.23 | 121,310 |
| 1980s Decade Quiz | 0 | - | 4.38 | 77,055 |
| 1850s Decade Quiz | 0 | - | 4.42 | 35,139 |
| 1790s Decade Quiz | 0 | - | 4.55 | 33,585 |
| 1800s Decade Quiz | 0 | - | 4.47 | 31,881 |
| Years in History #1 - Multiple Choice | 0 | - | 4.85 | 70,161 |
| Star Wars A-Z | 0 | - | 4.46 | 87,993 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 156,739 |
| Top Five Exporting Partners by Country | 0 | - | 4.87 | 67,055 |
| Musical Acts by Letter - J | 0 | - | 4.17 | 77,389 |
